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BMW Thermostats

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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Thermostat Installation Kit with Thermostat - N54, N55, S55
Thermostat Installation Kit with Thermostat - N54, N55, S55
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:55353595
Part#: OTN54.T85KT3
In Stock
New Item
$ 390.23 USD
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$ 390.23 USD
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High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.
N52 ECS Cooling System Refresh Kit - E8x E9x
N52 ECS Cooling System Refresh Kit - E8x E9x
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:59440849
Part#: TWTRPMPPIEBRPRKT
In Stock
New Item
$ 665.99 USD
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$ 665.99 USD
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Be sure your cooling system is up to the task
Water Pump And Thermostat Kit with Coolant
Water Pump And Thermostat Kit with Coolant
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:55965857
Part#: 11517604027KT3
Ships on Nov 11, 2026
New Item
$ 493.39 USD
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$ 493.39 USD
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Engineered to OE standards, this comprehensive cooling system package integrates the water pump, aluminum thermostat assembly, critical replacement hardware, and factory specified fluid into a single kit.
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Automatic Transmission Thermostat Kit
Automatic Transmission Thermostat Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:57122955
Part#: 17111438819KT2
Back Ordered
New Item
Sale - Save 2% $ 93.99

This product was last offered at the strikethrough price on
10-19-2026

$ 91.86 USD
Free Shipping on orders $49 and up
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Sale - Save 2%
$ 93.99

This product was last offered at the strikethrough price on
10-19-2026

$ 91.86 USD
Free Shipping on orders $49 and up
Add to Wish List
Keeping your E53 X5 automatic transmission cool is essential for longevity and peak performance. The factory transmission thermostat circuit relies on plastic housings and o-ring seals that deteriorate over time. When the transmission thermostat fails or it's mounting assembly cracks, coolant loss follows putting your transmission at risk of overheating under load.
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Coolant Thermostat
Coolant Thermostat
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:55785651
Part#: 17112249366
In Stock
New Item
$ 25.99 USD
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$ 25.99 USD
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The URO Parts replacement coolant thermostat is a cost-effective, high-quality solution to get your cooling system back to factory-spec operational standards.
Rein Thermostat Assembly - F Chassis, G-Chassis - B48
Rein Thermostat Assembly - F Chassis, G-Chassis - B48
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891628
Part#: 11537644811
Ships in 3 Business Days
New Item
$ 322.99

This product was last offered at the strikethrough price on
06-10-2026

$ 288.99 USD
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$ 288.99 USD
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Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.
Rein Thermostat Assembly - F22 F87 F23 F30 F34 F32 F33 F36 F15 F16 - N55
Rein Thermostat Assembly - F22 F87 F23 F30 F34 F32 F33 F36 F15 F16 - ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55965849
Part#: 11537598865
Ships in 3 Business Days
New Item
$ 79.99 USD
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$ 79.99 USD
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A malfunctioning or lazy thermostat can lead to poor fuel trim efficiency, sluggish performance, and destructive overheating. This Rein thermostat assembly is engineered as a robust direct replacement for your worn factory unit, ensuring proper coolant regulation through the radiator under heavy loads.
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Rein Junction Heat Hose - F3x F22 G30 G12 G01 G02 B58
Rein Junction Heat Hose - F3x F22 G30 G12 G01 G02 B58
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58563047
Part#: 11538606278
Ships in 3 Business Days
New Item
$ 38.99 USD
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$ 38.99 USD
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Protect your engine against thermal degradation and maintain precise cooling system pressure with a Rein Heat Exchanger Return Hose. Engineered as a direct fit replacement for failure prone factory coolant lines, this hose routes coolant through the heat exchanger assembly to prevent thermal spikes under heavy load. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure surges, oil exposure, and cracking across high output 3.0L inline six engine bays.
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Engine Coolant Thermostat - F25 F26 - N55
Engine Coolant Thermostat - F25 F26 - N55
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55965845
Part#: 11537586784
Ships in 3 Business Days
New Item
$ 85.99 USD
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$ 85.99 USD
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Maintain exact control over your N55’s operating temperatures under demanding street and track conditions with this Rein replacement thermostat unit. Engineered to match factory standards, this complete housing and thermostat assembly ensures your cooling system handles thermal loads flawlessly to prevent heat soak or dangerous overheating.
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Thermostat With Housing
Thermostat With Housing
Febi - Corporate Logo
T#:56001956
Part#: 11538635689
Special Order: No Guaranteed ETA
New Item
$ 126.99 USD
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$ 126.99 USD
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This Febi Bilstein thermostat assembly is the perfect solution for maintaining correct cooling system pressures and temperatures on the street or the track.
Thermostat Housing With Sealing Ring
Thermostat Housing With Sealing Ring
Febi - Corporate Logo
T#:56616332
Part#: 1151860136X
Special Order: No Guaranteed ETA
New Item
$ 64.99 USD
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$ 64.99 USD
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Maintain consistent temperatures both on the street or pushing your vehicle on the track with this OEM-quality thermostat housing from Febi Bilstein.
Thermostat With Housing, Seal And Temp Sensor
Thermostat With Housing, Seal And Temp Sensor
Febi - Corporate Logo
T#:56291021
Part#: 11537647305
Special Order: No Guaranteed ETA
New Item
$ 132.99 USD
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$ 132.99 USD
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This Febi Bilstein Thermostat Assembly provides OE-level thermal precision to keep your cooling system operating exactly as it should.
Thermostat With Housing & Gasket
Thermostat With Housing & Gasket
Febi - Corporate Logo
T#:56544033
Part#: 11537586885
Special Order: No Guaranteed ETA
New Item
$ 68.99 USD
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$ 68.99 USD
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This Febi Bilstein electronic coolant thermostat assembly delivers factory-level thermal control to keep coolant temperatures stable across varying engine loads.
Coolant Thermostat
Coolant Thermostat
Febi - Corporate Logo
T#:55857769
Part#: 11537598865
Special Order: No Guaranteed ETA
New Item
$ 68.99 USD
Free Shipping on orders $49 and up
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$ 68.99 USD
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This replacement thermostat from Febi Bilstein ensures your cooling system regulates precisely at the proper factory temperature parameters.

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