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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

T#:30397424

Part#: 11531730470KT2

In Stock

Sale - Save 10% $ 174.99

This product was last offered at the strikethrough price on
04-21-2026

$ 158.06 USD

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Sale - Save 10%

$ 174.99

This product was last offered at the strikethrough price on
04-21-2026

$ 158.06 USD

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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

T#:41897490

Part#: E30M20HSTKT

Back Ordered

Sale - Save 2% $ 338.99

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

$ 332.77 USD

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Sale - Save 2%

$ 338.99

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

$ 332.77 USD

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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 Pump & Thermostat Kit - BMW M42

T#:30198008

Part#: 11537511580KT5

Ships on Sep 29, 2026

Sale - Save 3% $ 118.99

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

$ 115.90 USD

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Sale - Save 3%

$ 118.99

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

$ 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

T#:41289770

Part#: 11531730470TKT

Ships in 3 Business Days

Sale - Save 22% $ 93.99

This product was last offered at the strikethrough price on
06-08-2026

$ 73.38 USD

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Sale - Save 22%

$ 93.99

This product was last offered at the strikethrough price on
06-08-2026

$ 73.38 USD

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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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Race German Coolant Temperature Sender Adapter - M12x1.5

T#:6827887

Part#: RGCTSAM12

Ships in 2 Business Days

$ 35.99 USD

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$ 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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Race German Coolant Temperature Sender Adapter - 1/8NPT

T#:6827888

Part#: RGCTSA1/8NPT

In Stock

$ 35.99 USD

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$ 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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Race German Rethreaded Coolant Sensor

T#:2602235

Part#: 001-08-00-00-09

Ships in 1 Business Day

$ 50.00 USD

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$ 50.00 USD

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Often overlooked item for your 24V E30 swap, this sensor is the best option for a plug and play solution to have a working temperature gauge when doing a engine swap.

Radiator Fan Switch Plug - E30, E34, E36, E23, E32

T#:23947130

Part#: E30RADFANSP

In Stock

$ 17.99 USD

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$ 17.99 USD

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Thanks to its brittle plastic construction, this radiator fan switch plug is a common failure point. Race German offers this high-quality replacement to remedy this issue and get your car back to perfect operation.

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Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

T#:640208

Part#: 17117639022

In Stock

Sale - Save 15% $ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

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Sale - Save 15%

$ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Race German Water Pump Stud Kit

T#:2602237

Part#: M20WPUMPSTUDKIT

Ships in 1 Business Day

$ 11.99 USD

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$ 11.99 USD

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Replaces the factory bolts with studs and nuts to make changing water pumps a breeze Features 3 Class 45H Allen Head Studs 3 Copper Flange Nuts

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