BMW Cooling System Parts & Accessories for BMW Z3 (1996-2002)

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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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Packaged by Turner - Corporate Logo
T#:338018
Part#: 17111723520
In Stock at Vendor
$ 97.99

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

Starting at $ 77.22 USD
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Starting at $ 77.22 USD
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This high quality BEHR brand expansion tank is used on M50, M52, S50 and S52 engines, and is a common failure item on all E36 3 series with 6 cylinder engines (325/328/323 and M3) 1992-1999, Z3 with 2.8 liter, MZ3 Roadster/Coupe (S52), and E39 528i from 1997-1998. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be leary of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own BMWs.

If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.

Need a new coolant level sensor too? If your coolant level sender is bad, your on board computer will constantly display a "low coolant" message (unless your coolant is actually low...). If you're replacing your expansion tank, now is a great time to replace this failure prone sensor. If you want a new coolant level sensor, simply choose from the option below. Because there are different sensors for different year/model BMWs, please be as specific as possible when you give us your car info during checkout (model, year, production date). Thanks!


This item fits the following BMWs:
1992-1998 E36 BMW 323ic 325i 325is 325ic 328i 328is 328ic M3
1997-1998 E39 BMW 528i
1997-1998 Z3 BMW Z3 2.8
1998-2000 Z3 BMW M Roadster M Coupe (S52)
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Packaged by Turner - Corporate Logo
T#:339093
Part#: TMS16427
In Stock at Vendor
$ 845.99

This product was last offered at the strikethrough price on
07-15-2026

Starting at $ 725.59 USD
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Starting at $ 725.59 USD
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This is a compete cooling system overhaul kit, which includes all of the common Z3 cooling system failure parts bundled into a complete package.

The Z3 cooling system's primary cooling components are prone to failure within 100k miles (or less in certain cases). 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 radiator & 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 cooling system. Our kit includes one radiator, OE BMW water pump (with composite impeller and O-ring), OEM thermostat and housing (complete with sensor and gasket), radiator cap, expansion tank, and new hoses (as pictured).

Optional items (which can be added below):
- Upgrade the waterpump to a Stewart/EMP High Performance pump
- Original BMW antifreeze
- Aluminum water pump pulley (stock plastic ones are known to crack)
- Cooling fan clutch

Buy as a package and save!!

This cooling system overhaul kit fits the following BMWs:
1999-2002 Z3 2.3 2.5i 2.8 3.0
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Packaged by Turner - Corporate Logo
T#:339091
Part#: TMS16426
Ships in 3 Business Days
Sale - Save 14% $ 628.99

This product was last offered at the strikethrough price on
06-15-2026

Starting at $ 539.49 USD
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Sale - Save 14%
$ 628.99

This product was last offered at the strikethrough price on
06-15-2026

Starting at $ 539.49 USD
Free Shipping
This is a compete cooling system overhaul kit, which includes all of the common Z3 M52 cooling system failure parts bundled into a complete package. This cooling system package is for the 1997-1998 Z3 2.8 Roadster and 1998-2000 MZ3 M Roadster or M Coupe.

The Z3 cooling system's primary cooling components are prone to failure within 60k miles (or less in many cases). 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 radiator & 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 cooling system. Our kit includes one OEM Behr radiator, an Original BMW waterpump (with updated composite impeller and O-ring), thermostat (complete with O-ring), aluminum thermostat housing, profile gasket, radiator cap and new hoses (as pictured).

Optional items (which can be added below):
- Upgrade the waterpump to a Stewart/EMP High Performance pump
- Original BMW antifreeze
- Add a new coolant expansion tank (known for cracking)

Buy as a package and save!!

This cooling system overhaul kit fits the following BMWs:
1997-1998 Z3 2.8 M52 Roadster
1998-2000 Z3 M Roadster, M Coupe
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Packaged by Turner - Corporate Logo
T#:557215
Part#: E36M44BCKT
Ships on Sep 29, 2026
Sale - Save 3% $ 252.99

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

$ 246.54 USD
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Sale - Save 3%
$ 252.99

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

$ 246.54 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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Packaged by Turner - Corporate Logo
T#:554073
Part#: 11537509227KT3
Ships on Jan 13, 2027
$ 101.99 USD
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$ 101.99 USD
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When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

  • Mahle-Behr thermostat with gasket
  • Thermostat mounting hardware
  • 1 liter of coolant

Applications:
1999-2003 E39 528i, 525i, 530i sedan, touring wagon (M52TU engine, M54 engine)
1999-2005 E46 323, 328, 325, 330 sedan, coupe, cabrio, touring wagon (M52TU engine, M54 engine)
2004-2005 E60 525i, 530i sedan, touring wagon (M54 engine)
2001-2006 E53 X5 3.0 (M54 engine)
2004-2006 E83 X3 2.5i X3 3.0i (M54 engine)
1999-2002 Z3 2.3. Z3 2.5i, 2.8 Z3 3.0i (M54 engine)
2003-2005 Z4 2.5i, Z4 3.0 (M54 engine)

 

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Spal - Corporate Logo
T#:598892
Part#: 185FH
In Stock
11% off MSRP $ 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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11% off MSRP
$ 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
Free Shipping
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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Spal - Corporate Logo
T#:583648
Part#: 30100400
In Stock
$ 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.
Spal - Corporate Logo
T#:598821
Part#: 30101516
Ships in 3 Business Days
11% off MSRP $ 168.99

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

$ 149.99 USD
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11% off MSRP
$ 168.99

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

$ 149.99 USD
Free Shipping
1469 CFM. High performance puller fan with straight blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 16.3in x 15.75in x 2.48in Airflow (CFM): 1469
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Spal - Corporate Logo
T#:376582
Part#: 30102049
In Stock
$ 207.99 USD
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$ 207.99 USD
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For BMW owners seeking enhanced airflow or tighter engine compartment clearance, Turner Motorsport presents a Universal Fan. Ideal for applications like aftermarket turbo setups, this fan ensures optimal cooling performance. Please note that this fan is universal and may require modification to fit your specific application. Crafted in Italy, this fan boasts dimensions of 16.30in x 15.75in x 3.47in and provides an airflow of 2024 CFM.

  • Enhanced airflow for improved engine cooling
  • Ideal for applications with tight tolerances, such as aftermarket turbo setups
  • Universal design allows for versatile installation
  • Crafted in Italy for quality assurance
  • Compact size with powerful airflow capacity
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Spal - Corporate Logo
T#:583649
Part#: 30102048
In Stock
$ 207.99 USD
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$ 207.99 USD
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Universal fan that allows increased cooling capacity and shroudless design. 1959 CFM.
Spal - Corporate Logo
T#:598801
Part#: 30100375
In Stock at Vendor
$ 99.99 USD
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$ 99.99 USD
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861 CFM. High performance puller fan with straight blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 13.25in x 12.5in x 2.2in Airflow (CFM): 861
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ACM - Corporate Logo
T#:2069
Part#: 17201728770
Ships in 2 Business Days
$ 207.15

This product was last offered at the strikethrough price on
05-11-2026

$ 201.97 USD
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$ 201.97 USD
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This transmission fluid/oil cooler fits E36 318i 318is 318ti 323i 323is 325i 325is 328i 328is M3, E34 525i 530i 1993-1995 and Z3 1.9 2.3 2.5i 2.8 3.0i with automatic transmission.

This oil cooler fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 323is 325i 325is 328i 328is M3
1993-1995 E34 BMW 525i 525i Wagon
1994-1995 E34 BMW 530i 530i Wagon
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0ibr>
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Spal - Corporate Logo
T#:2181323
Part#: FRH
Special Order: No Guaranteed ETA
12% off MSRP $ 112.99

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

$ 99.99 USD
Free Shipping
12% off MSRP
$ 112.99

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

$ 99.99 USD
Free Shipping
SPAL® electric fan relay wiring kits are designed to automatically turn on your SPAL® electric fan when the air conditioning is turned on. They can also be used when dual electric fans are installed using one switching device. 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 Harness is designed for 12V systems only Does not included thermo-switch
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Spal - Corporate Logo
T#:598818
Part#: 30102113
In Stock at Vendor
$ 257.99 USD
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$ 257.99 USD
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2467 CFM. High performance puller fan with curved blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 16.25in x 15.75in x 3.5in Airflow (CFM): 2467
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Genuine BMW Motorsport - Corporate Logo
T#:1171
Part#: TMS1171
Ships in 9 Business Days
$ 415.45 USD
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$ 415.45 USD
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This is a genuine BMW Motorsport part, designed specifically for BMW racing applications. We use this exact thermostat setup in our Championship-winning E46 330i race car. It is designed to be used on all M54 and M52TU double-VAN0S engines, as used in the 1999-2000 E46 323/328 and 2001-2005 E46 325/330. This 60 degree C (140 defrees F) thermostat comes complete with plastic thermostat housing. It does not use the plug and wiring for the stock DME so this should only be used with an aftermarket engine management system (Motec, Bosch, etc).

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.
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Genuine BMW Motorsport - Corporate Logo
T#:337991
Part#: 11531417215
Back Ordered
Starting at $ 232.98 USD
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Starting at $ 232.98 USD
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E46M3 Motorsport Thermostat 55C (Also fits Euro E36 M3 engine) A Genuine BMW part this thermostat opens at a much lower temperature than stock to keep your S54 engine (or Euro S50/S52 engine) running cooler in race applications.
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Spal - Corporate Logo
T#:598797
Part#: 30102029
In Stock
$ 207.99 USD
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$ 207.99 USD
Free Shipping
1328 CFM. High performance puller fan with curved blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 13.25in x 12.5in x 3.5n Airflow (CFM): 1328
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