BMW Cooling System Parts & Accessories for BMW 3 Series E30 (1984-1991)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Thermostat & Water Pump Kit - E30 325, 325e, 325i
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T#:30397424
Part#: 11531730470KT2
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Over time, the water pump in BMW vehicles becomes a common point of failure, typically requiring replacement around the 60,000-mile mark. To ensure optimal performance of your vehicle's cooling system, it's also advisable to replace the thermostat during this service. Turner aims to make this maintenance task easier with its all-in-one Water Pump & Thermostat Replacement Kit.

This comprehensive kit includes:

Water Pump - OEM Geba (11519071562) 80°C Thermostat - OEM MAHLE (11531713040) Thermostat Housing - URO Parts (11531730470) Thermostat Housing Gasket - Genuine BMW (11531722692) Antifreeze/Coolant, 1 Gallon - Genuine BMW (82141467704) Opt for this premium kit to ensure a thorough and reliable repair, extending the lifespan of your BMW's cooling system.

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Comprehensive Coolant Hose Kit - E30 M20
For vehicles with production date from 09/1987
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T#:41897490
Part#: E30M20HSTKT
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This Comprehensive Coolant Hose Kit – E30 is a must-have for any BMW M20 enthusiast looking to maintain cooling efficiency and avoid future breakdowns. Restore your classic E30’s performance and reliability with a hose kit built to last.
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Water Hose Set - E30 M3
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T#:3449
Part#: 11531309667KIT
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$ 167.05 USD
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This pacakge of six rubber cooling hoses for the E30 M3 includes most of the commonly replaced coolant lines on the S14. Set includes -
  • upper radiator hose from the large metal coolant pipe, #23 in the diagram
  • top thermostat hose to the large metal coolant pipe, #15 in the diagram
  • middle thermostat hose (T-shaped) to the small metal coolant pipe and to the water pump, #13 in the diagram
  • lower thermostat hose to the bottom of radiator, #22 in the diagram
  • lower radiator hose to coolant pipe, #24 in the diagram
  • expansion tank hose to the small metal coolant pipe, #17 in the diagram
    We use a mix if OE BMW and aftermarket hoses that we trust. This is the original E30 M3 Cooling Hose kit that we have been selling for 20 years. Looking for hose clamps too? We have OEM-style clamps for these too, select this in the options list below.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Turner OEM Water Hose Set - E30 M3
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    T#:338252
    Part#: 11531309667KIT
    Ships in 4 Business Days
    Sale - Save 3% $ 212.99

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    This pacakge of six rubber cooling hoses for the E30 M3 includes most of the commonly replaced coolant lines on the S14. Set includes -
  • upper radiator hose from the large metal coolant pipe, #23 in the diagram
  • top thermostat hose to the large metal coolant pipe, #15 in the diagram
  • middle thermostat hose (T-shaped) to the small metal coolant pipe and to the water pump, #13 in the diagram
  • lower thermostat hose to the bottom of radiator, #22 in the diagram
  • lower radiator hose to coolant pipe, #24 in the diagram
  • expansion tank hose to the small metal coolant pipe, #17 in the diagram
    We use a mix if OE BMW and aftermarket hoses that we trust. This is the original E30 M3 Cooling Hose kit that we have been selling for 20 years. Looking for hose clamps too? We have OEM-style clamps for these too, select this in the options list below.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Complete Cooling System Overhaul Package - 1988-1991 E30 M3
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    Packaged by Turner - Corporate Logo
    T#:338650
    Part#: TMS16418
    Ships in 3 Business Days
    Starting at $ 713.99 USD
    Starting at $ 713.99 USD
    This cooling package for the E30 M3 consists of all of the major components on the S14's cooling system. There are no major weak points to the E30's cooling system, unless you count skipped maintenance. The entire system is serviceable in individual components so you don't need to buy a complete package of parts. Many of the indivdual parts are on our site but we have setup this package to cover all or most of what you would need to perform a major overhaul. This overhaul package consists of an Genuine BMW radiator and then you build the package from there. Add hoses, sensors, water pumps, thermostats, gaskets, hose clamps, and more. We also sell the Original BMW antifreeze to finish off the job.

    Any problems with the cooling system are likely electrical. Sensors become corroded and fail over time which will send the incorrect signal to the corresponding unit, including the engine computer. Diagnosis of electrical type problems is easy and repair with the OEM Bosch or OE BMW sensors is not too expensive for a car like this. Electrical connections, particularly solder joints, can also become brittle and fail. These are not helped by the intense vibrations of the S14.

    Top Turner Tip for a healthy S14!
    E30 M3s always seem to have cooling problems at the most inconvenient time. If the temp gauge starts rising in the summer months first check and make sure your auxiliary cooling fan is working if it's not it's most likely the switch or the wiring going to the switch. Also remember that the E30 instrument conductor plate can make the gauge read whacky try tapping the gauge if it seems like it's acting up. When it's time to do a water pump (which weeps through a hole on the bottom before it goes completely) take a good look at the radiator too its not expensive and you have to remove it to install the pump anyway.

    Use the options below to build your package.

    This cooling package fits the following BMWs:
    1988-1991 E30 BMW M3
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    Water Pump & Thermostat Kit - BMW M42
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    T#:30198008
    Part#: 11537511580KT5
    Ships on Sep 29, 2026
    Sale - Save 3% $ 118.99

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    $ 115.90 USD
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    Regular maintenance is key to keeping your BMW running smoothly, and the water pump is a critical component that should be serviced every 60,000 miles. To ensure the overall efficiency of your cooling system, it's also recommended to replace the thermostat at the same time. Turner Motorsport has created a streamlined solution with their Water Pump & Thermostat Replacement Kit, making your cooling system upgrade simple and effective.

    Kit Includes:

    Meyle Water Pump with Metal Impeller (11510393338) VEMO Thermostat - 88°C (11537511580) Elring Thermostat Housing Flange Gasket (11531721172) Genuine BMW Coolant/Antifreeze (82141467704) Benefits:

    Enhanced Cooling Efficiency: Earlier opening thermostat improves temperature control under performance conditions. Reliable Components: Includes high-quality parts from Meyle and VEMO, known for their durability and reliability. Complete Solution: All necessary components for a comprehensive cooling system refresh in one convenient kit. Performance-Driven Design: Ideal for those looking to maintain and enhance the cooling capabilities of their S55 engine.

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    Thermostat Replacement Kit - E28, E30, E34 M20B25/27
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    T#:41289770
    Part#: 11531730470TKT
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    This BMW Thermostat Replacement Kit is the go-to choice for preserving the performance and reliability of your classic M20-powered BMW—keeping your engine running cool and smooth mile after mile.
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    Cooling System overhaul Kit - E30 325i/is/ix/e From 1988
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    T#:554135
    Part#: 11531722218KT3
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    This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the E30 325 with the M20 engine. 

    A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts. 

    This water pump fits the following BMWs: 
    1998-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix 

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    Basic Cooling System Service Kit - E30 M20 2.5L 2.7L (up to 09/1987) ...
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    T#:557223
    Part#: E30M20BCKT
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    $ 409.99 USD
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    Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

    To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

    See kit contents below for all included components.

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    Stock Replacement Radiator - E30 M3
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    Packaged by Turner - Corporate Logo
    T#:338019
    Part#: 17112225592
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    Starting at $ 347.99 USD
    Starting at $ 347.99 USD
    This is a new stock E30 M3 Radiator. We offer both Genuine BMW or Nissens brand radaitors. The Genuine BMW radiator is the highest quality radiator available. The Nissens is a high quality aftermarket radatior.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Water Pump - E30 M3
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    Packaged by Turner - Corporate Logo
    T#:337980
    Part#: 11511315211
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    Starting at $ 299.99 USD
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    Starting at $ 299.99 USD
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    This is the stock replacement water pump for the E30 M3. This is the Genuine BMW pump and includes a new OE BMW gasket. It's always a good idea to have one as a spare. Even if it sits on your shelf for awhile it's going to be used at some point (and prices for Genuine E30 M3 parts aren't getting any lower). Aftermarket pumps have been in short supply and the quality hasn't been as good as the Original BMW pump so we have decided to stop offering aftermarket brands like Laso or Saleri. This is the Genuine BMW part, straight from BMW.

    This item fits the following BMWs:
    1987-1991 E30 BMW M3
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    Complete Cooling System Overhaul Package - 1988-1992 E30 325i/is/ic ...
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:339938
    Part#: TMS16415
    In Stock
    Sale - Save 12% $ 314.99

    This product was last offered at the strikethrough price on
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    Starting at $ 275.98 USD
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    $ 314.99

    This product was last offered at the strikethrough price on
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    Starting at $ 275.98 USD
    This Cooling Kit for the 1988-1992 E30 325i covers all of the major replacement parts for the original cooling system. We start with an OEM Behr radiator and then you choose the additional parts you need to replace next. Add hoses, sensors, water pumps, thermostats, gaskets, hose clamps, and more. We also sell the correct Original BMW antifreeze to finish off the job.

    Of the systems in your E30, the cooling system is not where you want to let slide or skip maintenance. Almost nothing will ruin your day more than an overheating engine and it's usually at the absolute worse time. Maintaining the cooling system is easy and you can do most or all of the work yourself with ordinary tools. There's no reason not to address a leaky or out of date cooling system right away.

    To save you time and money, we recommend replacing major components with related parts.
    Radiator (manual: 17112241912; automatic: 17112241913)
    Upper (#11531722218) and lower (#11531718980) hoses to thermostat.
    Thermostat with o-ring and housing gasket (#11531713040).
    Water pump with timing belt and tensioner (#09-9320-000).
    Associated hoses with each of the above.
    V-belts with any of the above.

    Use the options below to build your package.

    This cooling package fits the following BMWs:
    1988-1992 E30 BMW 325i 325ic 325is
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    OEM Style Hose Clamps
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    Turner Motorsport - Corporate Logo
    T#:338927
    Part#: HOSE-CLAMPS
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    Starting at $ 3.87 USD
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    Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
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    Basic Cooling System Service Kit - E30 M42 1.8L
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    T#:557225
    Part#: E30M42BCKT
    Ships on Sep 29, 2026
    Sale - Save 2% $ 194.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 191.34 USD
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    $ 194.99

    This product was last offered at the strikethrough price on
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    $ 191.34 USD
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    Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

    To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

    See kit contents below for all included components.

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    Cooling System overhaul Kit - E30 318i 318is
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:554545
    Part#: 17111712835KT5
    Ships on Sep 29, 2026
    Sale - Save 2% $ 356.99

    This product was last offered at the strikethrough price on
    05-03-2026

    $ 349.86 USD
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    $ 356.99

    This product was last offered at the strikethrough price on
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    $ 349.86 USD
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    This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the E30 with the M42 engine. 

    A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts. 

     

    This kit fits the following BMWs:

    318i 318is M42

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    Complete Cooling System Overhaul Package - 1987 E30 325i/is/ic ...
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:340132
    Part#: TMS16413
    Ships on Aug 19, 2026
    $ 283.99

    This product was last offered at the strikethrough price on
    05-17-2026

    Starting at $ 277.98 USD
    Starting at $ 277.98 USD
    This Cooling Kit for the 1987 E30 325i covers all of the major replacement parts for the original cooling system. We start with an OEM Behr radiator and then you choose the additional parts you need to replace next. Add hoses, sensors, water pumps, thermostats, gaskets, hose clamps, and more. We also sell the correct Original BMW antifreeze to finish off the job.

    Of the systems in your E30, the cooling system is not where you want to let slide or skip maintenance. Almost nothing will ruin your day more than an overheating engine and it's usually at the absolute worse time. Maintaining the cooling system is easy and you can do most or all of the work yourself with ordinary tools. There's no reason not to address a leaky or out of date cooling system right away.

    Top Turner Tip!
    On the 1987 325i, pay particular attention to the alternator fan blades and the clearance to the lower radiator hose. As the engine shifts on worn motor mounts, and the alternator twists on worn bushings, the cooling blades can slice right through the hose. Replace the alternator bushings and use our motor mount reinforcements. Or convert the whole system to the 1988+ cooling system which moves the lower hose to the other side of the radiator.

    To save you time and money, we recommend replacing major components with related parts.
    Radiator (manual: #17111468074; automatic: #17111468075)
    Upper (#11531286914) and lower (#11531279895) hoses to thermostat.
    Thermostat with o-ring and housing gasket (#11531713040).
    Water pump (#11519071562)
    Timing belt and tensioner (#09-9320-000).
    Associated hoses with each of the above.
     - hose from water pump to thermostat (#11531287651)
     - hose from expansion tank to water pump (#11531289257)
     - hose from throttle body to thermostat (#13541705568)
    V-belts with any of the above.

    Use the options below to build your package.

    This cooling package fits the following BMWs:
    1987 E30 BMW 325i 325ic 325is
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    Basic Cooling System Service Kit - E30 M20 2.5L 2.7L (09/1987+) ...
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:557228
    Part#: E30M20BCKT2
    Back Ordered
    Sale - Save 9% $ 323.99

    This product was last offered at the strikethrough price on
    06-30-2026

    $ 294.69 USD
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    $ 323.99

    This product was last offered at the strikethrough price on
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    $ 294.69 USD
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    Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

    To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

    See kit contents below for all included components.

    Show More Show Less
    Cooling System overhaul Kit - E30 325i/is/ix/e upto 1988
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:554131
    Part#: 11531286914KT2
    Back Ordered
    $ 957.99

    This product was last offered at the strikethrough price on
    05-17-2026

    $ 937.99 USD
    $ 937.99 USD

    This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the E30 325 with the M20 engine. 

    A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts. 

    This water pump fits the following BMWs: 
    1986-1988 E30 BMW 325e 325es 325i 325ic 325is 325ix 

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    BMW Antifreeze Coolant - 1 Gallon
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    Genuine BMW - Corporate Logo
    T#:1474
    Part#: 82141467704
    In Stock
    6% off MSRP $ 28.29

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 26.63 USD
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    6% off MSRP
    $ 28.29

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 26.63 USD
    Free Shipping on orders $49 and up
    The use of Original BMW Anti-Freeze/Coolant will ensure sufficient cooling in summer and protection against freeze-ups in winter. BMW Antifreeze/Coolant will also guard your vehicle's various engine components against corrosion.
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    ECS Tuning Aluminum Coolant Bleeder Screw
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    ECS - Corporate Logo
    T#:363070
    Part#: 003530ECS01A
    In Stock
    Sale - Save 25% $ 35.99

    This product was last offered at the strikethrough price on
    06-13-2026

    $ 26.99 USD
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    $ 35.99

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    Replace the flimsy plastic bleeder screw used in the coolant expansion tank or in one of the cooling system hoses with this high quality, durable, aluminum bleeder screw. The stock plastic screw can deform over time due to heat or even regular use. We have even seen the head of the screw snap off, leaving the threaded body stuck in the expansion tank. This aluminum screw will help to prevent sudden failure of the bleeder screw, which can result in immediate overheating of the car.

    ECS Tuning's Aluminum Coolant Bleeder Screw replaces Genuine BMW Part Number 17111712788

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    PENTOFROST NF 50/50 Antifreeze / Coolant Prediluted / Premixed - 1 G...
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    Pentosin - Corporate Logo
    T#:34181293
    Part#: 8114308
    In Stock
    $ 20.99 USD
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    Blue G11/G48 Coolant Pre-Mixed 50/50

    OEM Mahle-Behr Thermostat - 80 Degree - E24, E28, E30, E32, E34, E36,...
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    Mahle-Behr - Corporate Logo
    T#:2199
    Part#: 11531713040
    In Stock at Vendor
    $ 36.00

    This product was last offered at the strikethrough price on
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    $ 35.99 USD
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    $ 35.99 USD
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    The thermostat regulates the temperature of your coolant. At a predetermined temperature the thermostat will open to let coolant flow to the radiator and be cooled by airflow or the fan. Over time the thermostat will become stuck open or closed, leading to a variety of issues. A closed thermostat will never allow the coolant to reach the radiator and be cooled. Hot coolant will continue to circulate through the engine and absorb even more heat until boiling and the system overheats. An open thermostat is not as bad but is still not ideal - the coolant is always cool, with the temp needle always reading in the cool range. This tells the ECU to richen the fuel mixture to bring the car up to normal operating temp. So your fuel mileage decreases and the car runs rich.

    Replacing the thermostat is an easy but messy job. This thermostat includes the main o-ring (but a housing gasket may be required). Consider replacing the housing and any associated temp sensors while you're in there. The cooling system will need to be bled after.

    Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 80* thermostat, towards the lower end of the range. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.

    This thermostat fits the following BMWs:
    1977-1983 E21 BMW 323i
    1986-1991 E30 BMW 318is 318ic 325e 325es 325i 325ic 325is 325ix
    1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
    1982-1988 E28 BMW 528e
    1986-1988 E28 BMW 535i
    1989-1995 E34 BMW 525i 535i
    1997-1998 E39 BMW 528i
    1986-1989 E24 BMW 635csi
    1988-1994 E32 BMW 735i 735il
    1997-2000 Z3 BMW Z3 2.8 M Roadster M Coupe
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    BMW Fan Clutch Wrench Set - CTA
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    CTA Tools - Corporate Logo
    T#:640926
    Part#: CTAA886L
    In Stock
    $ 52.17 USD
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    32mm Wrench removes the lock nuts on the thermo-viscous fan, while the other holds the water pump pulley while loosening the radiator fan
    Mishimoto Adjustable Fan Controller Kit
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    Mishimoto - Corporate Logo
    T#:363510
    Part#: MMFANCNTLUPROBE
    In Stock
    9% off MSRP $ 98.00

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    $ 88.99 USD
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    9% off MSRP
    $ 98.00

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 88.99 USD
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    Take Control of Your Engine Cooling Fan with Mishimoto's Manual Fan Controller Kit

    Ensure your engine runs at the perfect temperature by using this versatile manual fan controller system, compatible with all 12v fan-equipped vehicles. With adjustable activation temperature settings ranging from 150°F to 240°F, you have precise control over your engine's cooling fan. The kit includes a probe-style temperature sensor and a generous 7 feet of wire, making it suitable for installation in vehicles of various sizes.

    For added convenience, the system is equipped with a built-in A/C override feature, ensuring your cooling system works seamlessly. It's designed to work with one or two electric fans drawing a combined 25 amps or less. The package includes all the essential wiring connectors and hardware needed for a trouble-free installation.

    With a lifetime warranty from Mishimoto, you can trust in the quality and durability of this manual fan controller kit.

    WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to all companies selling products in California.

    Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warnings, visit www.P65Warnings.ca.gov.

    WARNING! Prog 65 may apply to this product.Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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    Mishimoto Racing Thermostat - 68 Degree - E24, E28, E30, E32, E34, E3...
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    Mishimoto - Corporate Logo
    T#:363172
    Part#: MMTSE3692
    In Stock
    $ 68.99 USD
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    The thermostat regulates the temperature of your coolant. At a predetermined temperature the thermostat will open to let coolant flow to the radiator and be cooled by airflow or the fan. Over time the thermostat will become stuck open or closed, leading to a variety of issues. A closed thermostat will never allow the coolant to reach the radiator and be cooled. Hot coolant will continue to circulate through the engine and absorb even more heat until boiling and the system overheats. An open thermostat is not as bad but is still not ideal - the coolant is always cool, with the temp needle always reading in the cool range. This tells the ECU to richen the fuel mixture to bring the car up to normal operating temp. So your fuel mileage decreases and the car runs rich.  

    Replacing the thermostat is an easy but messy job. This thermostat includes the main o-ring (but a housing gasket may be required). Consider replacing the housing and any associated temp sensors while you're in there. The cooling system will need to be bled after.  

    Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 68*C thermostat, at the bottom of the temperature range. It should only be used in racing situations such as when deleting the engine fan. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.  

    Mishimoto makes coolant tanks, radiators and much more for your Mini/BMW. Established in 2003 their commitment to absolute quality in the aftermarket world is evident through the quality and performance enhancing products they offer.
     

    This thermostat fits the following BMWs:   
    1977-1983  E21 BMW  323i  
    1986-1991  E30 BMW  318is 318ic 325e 325es 325i 325ic 325is 325ix  
    1992-1999  E36 BMW  318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3  
    1982-1988  E28 BMW  528e  
    1986-1988  E28 BMW  535i  
    1989-1995  E34 BMW  525i 535i  
    1997-1998  E39 BMW  528i  
    1986-1989  E24 BMW  635csi  
    1988-1994  E32 BMW  735i 735il  
    1997-2000  Z3 BMW  Z3 2.8 M Roadster M Coupe 

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    Schwaben Coolant Refill/Air Purge Tool
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    Schwaben - Corporate Logo
    T#:362940
    Part#: 003466SCH01
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    $ 87.99 USD
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    When it comes to BMW's we all know the weak point is commonly in the cooling system, many models proving hard to bleed the air pockets out after the refresh. The coolant refill tool solves this problem, ensuring that you get an air pocket free fill. The entire task is as simple as draining the system like normal, reinstalling the drain plugs and hooking the tool up to your refill location. The reason this tool works so well is due to the venturi valve, it converts air pressure from the compressor to vacuum inside the cooling system, then with a twist of a valve sucks coolant right into the system using the vacuum pressure.
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    Coolant Vacuum Purge & Refill Tool Set
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    Schwaben - Corporate Logo
    T#:402498
    Part#: 024948SCH01A
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    $ 86.99 USD
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    The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.
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    Genuine BMW Expansion Tank Cap - E3X / E53 / Z4
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    Genuine BMW - Corporate Logo
    T#:207187
    Part#: 17117639022
    In Stock
    21% off MSRP $ 34.96

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 27.67 USD
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    21% off MSRP
    $ 34.96

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    $ 27.67 USD
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    Genuine BMW Radiator Cap - 2,0Bar
    This item fits the following BMW Chassis:
    E36 M3,E39 M5,E46 M3,E85 Z4M,E53 48IS,E36,E38,E39,E46,E53 X5,E65,E83 X3,E85 Z4,E86 Z4,F06,F10,F12,F13

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    Achilles Motorsport OBD1-to-OBD2 Coolant Hose Adapter - BMW M52 S52 E...
    For models with a OBD2 24v Swap (M5X, S5X engines) only!
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    Achilles Motorsports - Corporate Logo
    T#:1150775
    Part#: 11-AM-CHCAP-OBD1
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    $ 54.99 USD
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    $ 54.99 USD
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    OBD2 to OBD1 Conversion Coolant Hose Adapter for E36 M52 & S52 Engines Replaces the metal pipe from the OBD2 engines with a hose adapter that allows the installation of a normal OBD1 coolant hose. This is useful when converting an OBD2 Engine to OBD1, or when swapping OBD2 engines into a car that is originally OBD1 (like an E30). The simple kit comes complete with the necessary 2 O-rings, extended bolt, Nylon Lock Nut & washers to make this a quick install. No need to wait! It is also completely reversible!
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    Powerflex Street Offset Lower Radiator Mounts
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    Powerflex - Corporate Logo
    T#:21637255
    Part#: PFF5-4652
    In Stock
    $ 42.99 USD
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    Powerflex Offset Lower Radiator Mounts for BMW E30, E36, E46, Z3, and Z4 offer a comprehensive range of benefits, including heightened cooling efficiency, precise radiator alignment, extended durability, noise reduction, compatibility with BMW models, and suitability for performance-oriented driving scenarios. These mounts are the preferred choice for BMW owners seeking to enhance their vehicle's cooling system performance, whether for daily driving or high-performance applications. Powerflex Offset Lower Radiator Mounts for BMW bring a host of advantages, encompassing: Enhanced Cooling Efficiency: Engineered for improved radiator positioning, these mounts enhance airflow, resulting in superior cooling performance. This ensures that the engine maintains an optimal temperature, reducing the risk of overheating during extended use or demanding conditions. Precise Radiator Alignment: These mounts offer precise radiator alignment, securing it firmly in place. This precision minimizes the potential for vibrations or alignment issues that could lead to leaks or inefficient cooling. Improved Durability and Longevity: Powerflex Offset Lower Radiator Mounts are meticulously crafted using durable polyurethane and high-quality materials. This robust construction enhances the mounts' lifespan, ensuring they can withstand the rigors of daily driving and challenging environments. Reduction in Vibrations and Noise: The secure and stable mounting provided by these mounts effectively reduces vibrations and noise stemming from radiator movement. This leads to a quieter and smoother driving experience without compromising cooling efficiency. BMW Model Compatibility: Designed exclusively for BMW vehicles, these mounts seamlessly and effectively integrate with your vehicle. They cater to the needs of BMW enthusiasts seeking to augment cooling performance and preserve their vehicle's reliability. Ideal for Performance Enthusiasts: Powerflex Offset Lower Radiator Mounts hold particular appeal for performance enthusiasts. They present an effective solution for optimizing cooling in high-performance BMW models, ensuring consistent engine performance during spirited drives or track sessions.
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    Spal Electric Fan Harness with Relay - 185 Degree Switch
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    Spal - Corporate Logo
    T#:598892
    Part#: 185FH
    In Stock
    11% off MSRP $ 193.99

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    $ 171.99 USD
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    $ 193.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 171.99 USD
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    SPAL® electric fan wiring harness kits are a must-have when installing electric fans. Designed to safely integrate with OEM wiring, the SPAL kits feature a waterproof relay along with printed wires which aid in installation. The wiring kits also feature stainless steel switches with optional switched override capability, fuse holder, and wiring connectors. Features: Makes installation of your new fan a breeze Designed to safely integrate with OEM wiring Feature a waterproof 10/40 amp relay with printed wires for easy installation Kit features a 3/8” NPT thermos-switch and a 3/8” to ½” NPT adapter Harness is designed for 12V systems only
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    Febi Auxiliary Fan Switch - 82�C - E12, E21, E23, E24, E28, E3, ...
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    Febi - Corporate Logo
    T#:10520
    Part#: 61311364272
    In Stock
    $ 20.99 USD
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    CHASSIS ELECTRICAL TEMPERATURE SWITCH 61311364272

    Meyle Radiator Fan Clutch - E12, E24, E28, E30, E34, E36, Z3 ...
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    Meyle - Corporate Logo
    T#:384584
    Part#: 11521723918
    In Stock
    $ 108.99

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    $ 89.99 USD
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    $ 89.99 USD
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    Quality aftermarket replacement

    Spal Universal 16" Low Profile Electric Fan
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    Spal - Corporate Logo
    T#:583648
    Part#: 30100400
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    $ 111.99 USD
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    $ 111.99 USD
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    Low profile design makes an easy fit when clearance is an issue. 1300 CFM.
    BMW E30 Performance Aluminum Radiator
    For vehicles with production date from 09/1987 with manual transmission
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    ECS - Corporate Logo
    T#:367036
    Part#: 006084ECS01A
    In Stock
    Sale - Save 25% $ 412.99

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    06-13-2026

    $ 309.74 USD
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    ECS Tuning has answered the call, delivering a solution to eliminate these issues once and for all, bidding farewell to cracked plastic end tanks and unsightly coolant stains on driveways.

    Key Features and Benefits:

    • Performance and Durability: This radiator is meticulously crafted with an emphasis on performance, durability, and aesthetics. It represents a comprehensive upgrade for all E30 owners, whether they use their vehicles for daily commuting or weekend adventures.

    • Full Aluminum Construction: The radiator is constructed entirely from aluminum, ensuring superior strength and longevity. Precision TIG welding at all joints not only enhances durability but also imparts a show-car quality appearance.

    • Polished End Tanks: Polished end tanks contribute to the radiator's striking appearance, elevating the overall aesthetics of your BMW E30.

    • Enhanced Design: Weak plastic components, such as the drain plug and fan switch holes, have been replaced with threaded alloy bungs in stock locations. The factory fan shroud's weak plastic tabs have been upgraded to robust aluminum.

    • Drop-In Solution: Designed as a hassle-free drop-in solution, this radiator seamlessly fits into place like a stock replacement, yet it offers remarkable performance and aesthetics at a substantially lower cost than comparable options.

    Upgrade your cooling system today, bid farewell to worries, and do it all with style – choose the ECS Tuning Performance Aluminum Radiator for your BMW E30. Experience superior cooling performance, durability, and aesthetic enhancement in one exceptional radiator upgrade. Don't wait; make the smart choice for your BMW E30 today.

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    OEM Bosch Coolant Temperature Sensor - E36 318i 325i M3 1992-1995, E3...
    For vehicles with production date from 12/1984
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    Bosch - Corporate Logo
    T#:7259
    Part#: 13621709967
    In Stock
    $ 24.23 USD
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    $ 24.23 USD
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    To make sure your temperature readings are as accurate as possible, replace your temperature sensor with a high quality OEM Bosch temperature sensor.

    OEM replacement for BMW part # 13621709967, 13621709966, and 13621284397. Bosch coolant temperature sensor mounted in the cylinder head on models with the M42, M50 and S50 engines.

    Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

    As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


    This item fits the following BMWs:
    1988-1991 E30 BMW 318i 318is 318ic M3
    1992-1995 E36 BMW 318i 318is 318ti 318ic 325i 325is 325ic M3
    3/1987-1988 E28 BMW 528e
    1985-1988 E28 BMW535i 535is M5
    1989-1995 E34 BMW 525i 535i M5
    1985-1989 E24 BMW 635csi M6
    1984-1987 E23 BMW 735i
    1988-1992 E32 BMW 735i 735il

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    URO Coolant Expansion Tank - E30 325e 325i 88-91
    For vehicles with production date from 09/1987
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    URO - Corporate Logo
    T#:2453609
    Part#: 17111712641
    In Stock
    $ 46.99 USD
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    $ 46.99 USD
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    This coolant reservoir is for the E30 325i 1988-1991. We have found that the expansion tanks should be replaced based on age as well as condition. This item fits the following BMWs: 1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
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    Genuine BMW Heater Hose - E30 M20 2.5L 2.7L
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    Genuine BMW - Corporate Logo
    T#:368716
    Part#: 64211380527
    In Stock
    4% off MSRP $ 46.22

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    $ 44.58 USD
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    4% off MSRP
    $ 46.22

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    $ 44.58 USD
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    Genuine BMW Thermostat - 88ºC
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    Genuine BMW - Corporate Logo
    T#:360691
    Part#: 11537511580
    In Stock
    3% off MSRP $ 59.99

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    $ 57.99 USD
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    3% off MSRP
    $ 59.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 57.99 USD
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    Mahle-Behr Coolant Expansion Tank - E30
    For vehicles with production date from 09/1987
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    Mahle-Behr - Corporate Logo
    T#:399336
    Part#: 17111712641
    In Stock at Vendor
    $ 56.99 USD
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    $ 56.99 USD
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    Replace your cracked or faded expansion tank.

    Radiator Fan Switch
    For vehicles with production date from 09/1987
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    URO - Corporate Logo
    T#:361996
    Part#: 61311378073
    In Stock
    $ 26.44 USD
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    $ 26.44 USD
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    Measures radiator air temperature enabling the fan to turn off or on
    Universal Black 16" Electric Fan
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    Mishimoto - Corporate Logo
    T#:363170
    Part#: MMFAN16
    In Stock
    $ 115.99 USD
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    $ 115.99 USD
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    Bav Auto Spill-Proof Coolant / Antifreeze Funnel
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    Bav Auto Tools - Corporate Logo
    T#:580395
    Part#: B8800082
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    Sale - Save 15% $ 32.99

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    $ 28.04 USD
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    Multiple adapters include to fit a variety of vehicles.
    Race German Coolant Temperature Sender Adapter - M12x1.5
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    Race German - Corporate Logo
    T#:6827887
    Part#: RGCTSAM12
    In Stock
    $ 35.99 USD
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    Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
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    Schwaben Water Pump Pulley Holder for Removal of Fan Clutch
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    Schwaben - Corporate Logo
    T#:362357
    Part#: 001170SCH01A
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    $ 32.99 USD
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    Replacing the fan clutch on most BMW models requires holding the water pump pulley while removing the fan clutch lock nut. With less than 1 1/2" clearance on some models this project can easily turn into a mechanical nightmare. Using our special slim line fan clutch wrench in conjunction with the appropriate pulley spanner, the removal and installation required only a few moments.
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    Bav Auto Fan Clutch Wrench - 32mm
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    Bav Auto Tools - Corporate Logo
    T#:580348
    Part#: B8800019
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    $ 23.99 USD
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    Used to remove your fan clutch
    Schwaben Locking Hose Clamp Pliers
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    Schwaben - Corporate Logo
    T#:377131
    Part#: 004170SCH01A
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    Sale - Save 55% $ 63.99

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    $ 28.79 USD
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    These pliers feature a spring loaded clamp with a 24" cable and will lock onto the clamp and hold open for easy removal. These pliers are designed to remove metal or plastic self-tightening hose clamps with diameters from 11/16" to 2-1/2" ( 18 to 54mm).
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    Race German Coolant Temperature Sender Adapter - 1/8NPT
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    Race German - Corporate Logo
    T#:6827888
    Part#: RGCTSA1/8NPT
    Back Ordered
    $ 35.99 USD
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    Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor
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    Heater Hose
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    URO - Corporate Logo
    T#:363331
    Part#: 64218367790
    In Stock
    $ 34.99 USD
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    Used to connect to the inline thermostat
    Coolant Hose E30 E34 M20 2.5L
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    Genuine BMW - Corporate Logo
    T#:367835
    Part#: 13541719967
    In Stock
    3% off MSRP $ 36.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 35.99 USD
    Free Shipping on orders $49 and up
    3% off MSRP
    $ 36.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 35.99 USD
    Free Shipping on orders $49 and up

    Upgrade your BMW E30 or E34 M20 2.5L engine with this Genuine BMW Coolant Hose. Crafted to exacting standards, this hose ensures optimal performance and durability for your vehicle. Say goodbye to leaks and overheating issues with this high-quality replacement part. Keep your BMW running smoothly and efficiently with this essential component.

    • Genuine BMW part for perfect fit and function
    • Crafted to exacting standards for durability
    • Prevents leaks and overheating
    • Ensures optimal engine performance
    • Compatible with BMW E30 and E34 M20 2.5L engines
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