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Wahler BMW Cooling System Parts & Accessories

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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OEM Wahler Thermostat With Housing - E46 E53 E60 E83 M54

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T#:341054

Part#: 11537509227

In Stock

$ 69.99 USD

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$ 69.99 USD

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Stop leaks before they start with this new Thermostat With Housing from Wahler. Despite the fact that most BMW models are brilliant, most have common issues that can plague you during your ownership of the car. This part is one of those issues, as they are known to crack over time. This replacement part is perfect stop a crack and possibly a leak before it starts.

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Wahler Thermostat Assembly - BMW N55 3.0L

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T#:39261790

Part#: 11537598865

In Stock

$ 147.93 USD

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$ 147.93 USD

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BMW N55 3.0L Thermostat Assembly is an essential component for maintaining optimal engine temperature in your BMW, ensuring reliable performance and longevity. A common source of cracks and leaks, the thermostat assembly plays a critical role in regulating coolant flow. This high-quality replacement from Turner Motorsport is designed to meet or exceed OEM standards, providing a dependable solution to prevent overheating and maintain your engine's efficiency.

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Thermostat - 80C

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T#:594831

Part#: 11531713040

In Stock at Vendor

$ 49.61 USD

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$ 49.61 USD

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Wahler Thermostat - 105C

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T#:369356

Part#: 11537586885

In Stock

$ 72.99 USD

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$ 72.99 USD

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Includes housing and sealing o-ring

Wahler Thermostat - 88ï¿½C - E30, E34, E36, Z3

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T#:369466

Part#: 11537511580

In Stock

$ 52.99

This product was last offered at the strikethrough price on
06-19-2026

$ 51.99 USD

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$ 51.99 USD

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Common point of failure in the cooling system.

Thermostat - MINI Cooper S R52 R53

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:2257

Part#: 11531485847

In Stock

52% off MSRP $ 43.68

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

$ 20.99 USD

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52% off MSRP

$ 43.68

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

$ 20.99 USD

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Don't take chances! Proper maintenance is required to keep your MINI performing at peak levels. The thermostat basically controls when your car will overheat. This thermostat fits MINI Cooper S R52 R53 with supercharged engine.

Manufacturing OE-grade replacement cooling parts is Wahler’s specialty. When you need to replace a component in your vehicle’s water system, high grade, and long-lasting parts from Wahler ensure the job is done properly the first time.

This item fits the following BMWs:
2002-2006 R53 MINI MINI Cooper S
2003-2007 E52 MINI MINI Cooper S Convertible

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Thermostat - 80°C

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T#:375224

Part#: 11531466174

Ships on Aug 3, 2026

$ 30.99 USD

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$ 30.99 USD

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Wahler Thermostat - E31, E32

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T#:579650

Part#: 4516.85

Back Ordered

$ 34.99 USD

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$ 34.99 USD

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Stop your overheating problem.

Wahler Thermostat O-Ring - E46, Z3, Z4

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T#:362366

Part#: 11531318402

Ships in 5 Business Days

$ 6.17 USD

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$ 6.17 USD

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BMW does not include a o-ring with their new thermostats

Wahler Performance Thermostat - 75*C - M42, M50, M52, S50, S52 ...

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T#:54388511

Part#: 11537511580

In Stock at Vendor

$ 59.99 USD

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$ 59.99 USD

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75°C variant is specifically calibrated for track racing, forced-induction builds, or hot-climate competitive environments

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