BMW Thermostats for BMW 3 Series E46 (1999-2005)

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BMW thermostats are known to fail, but luckily they typically fail wide open - meaning that your car can still cool. We offer thermostats from various OE suppliers we trust along with upgraded motorsport specific thermostats where applicable to make sure your BMW stays cool on track.
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Bavarian Autosport - Corporate Logo
T#:12544802
Part#: 11531437040
In Stock
Sale - Save 25% $ 104.99
$ 78.74 USD
Free Shipping on orders $49 and up
Sale - Save 25% $ 104.99
$ 78.74 USD
Free Shipping on orders $49 and up
The plastic thermostat cover in your BMW is a known point of failure. Throughout years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating. Eliminate one of the weak links in your cooling system with a replacement aluminum thermostat housing. By installing this aluminum unit, you have no worries as far as plastic housing cracks go
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Genuine BMW Motorsport - Corporate Logo
T#:3
Part#: 11531417215
Ships Aug 6, 2025
$ 206.99 USD
Free Shipping
$ 206.99 USD
Free Shipping
E46 M3 Motorsport Thermostat, 55*C (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 running cooler in race applications.
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Bremmen Parts - Corporate Logo
T#:26494584
Part#: 11537509227
In Stock
$ 56.99 USD
Free Shipping on orders $49 and up
$ 56.99 USD
Free Shipping on orders $49 and up

Genuine BMW Motorsport - Corporate Logo
T#:1171
Part#: TMS1171
Ships Jul 9, 2025
$ 509.61 USD
Free Shipping
$ 509.61 USD
Free Shipping
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
Ships Aug 5, 2025
Sale - Save 1% $ 232.99
Starting at $ 230.91 USD
Free Shipping
Sale - Save 1% $ 232.99
Starting at $ 230.91 USD
Free Shipping
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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