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BMW M3 Engine Thermostat Parts

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Thermostat Installation Kit with Thermostat

It's no secret that modern turbocharged BMW engines run hot. Whether you're turning laps at the track or sitting in summer traffic, high oil temperatures are the enemy of engine longevity and performance. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481206
Mfg#:
OTN54.T85KT2
Ships in 1-2 days
ON SALE!
$390.23 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mosselman S55 Billet Oil Thermostat - Silver

ES#4446093 - OTS55.T85 - Mosselman S55 Billet Oil Thermostat - Silver - The MSL thermostat ensures a cooler oil temperature which will result in more stable performance - Mosselman Turbosystems - BMW

The MSL thermostat ensures a cooler oil temperature which will result in more stable performance

Brand:
Mosselman Turbosystems - Corporate Logo
ES#:
4446093
Mfg#:
OTS55.T85
Ships in 5 Business Days
$459.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Thermostat - 90C

ES#4158502 - 11537586885 - Performance Thermostat - 90C - Includes housing and sealing o-ring - Bremmen Parts - BMW
ECS Tuning recommends this product.

Includes housing and sealing o-ring 10X Entries For Our 25th Anniversary Sweepstakes!
Low-temp thermostat reduces stresses on engine components and improves performance

Brand:
Bremmen Parts - Corporate Logo
ES#:
4158502
Mfg#:
11537586885
In Stock
ON SALE! SAVE 20%
$93.99

This product was last offered at the strikethrough price on
05-02-2026

$75.06 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Thermostat - 90C

ES#2807159 - 11537586885-90C - Performance Thermostat - 90C - Includes housing and sealing o-ring - Hamburg Tech - BMW

Includes housing and sealing o-ring We Price Match - Give Us A Call or Chat! Low-temp thermostat reduces stresses on engine components and improves performance

Brand:
Hamburg Tech - Corporate Logo
ES#:
2807159
Mfg#:
11537586885-90C
In Stock
$114.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#10939 - 11531318274 - Thermostat - 80C - Restore your cooling performance with a brand new thermostat - Wahler - BMW

Restore your cooling performance with a brand new thermostat

Brand:
Wahler - Corporate Logo
ES#:
10939
Mfg#:
11531318274
In Stock
$105.99

This product was last offered at the strikethrough price on
06-25-2026

$68.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 Low Temp Oil Thermostat Kit - 70c

ES#4817856 - n54n55ltKT - N54/N55 Low Temp Oil Thermostat Kit - 70c - New billet thermostat cover, hardware and gasket. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory. - Assembled By ECS - BMW

New billet thermostat cover, hardware and gasket. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4817856
Mfg#:
N54N55LTKT
Back Ordered
Auto Notify
ON SALE! SAVE 18%
$152.99

This product was last offered at the strikethrough price on
05-02-2026

$125.58 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Water Pump & Thermostat Kit

ES#4818358 - 11517527799KT - Performance Water Pump & Thermostat Kit - Featuring a high-performance Stewart water pump and low-temp Mishimoto thermostat with aluminum housing! - Assembled By ECS - BMW

Featuring a high-performance Stewart water pump and low-temp Mishimoto thermostat with aluminum housing! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4818358
Mfg#:
11517527799KT
In Stock
$357.99

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

$338.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Low Temp Oil Thermostat Kit - N54/N55

ES#4428270 - 090743ECS09 - Low Temp Oil Thermostat Kit - N54/N55 - Control those oil temps with a new thermostat! - ECS - BMW

Control those oil temps with a new thermostat! 10X Entries For Our 25th Anniversary Sweepstakes!
For 2008 and up models only
Recommended for track use only!

Brand:
ECS - Corporate Logo
ES#:
4428270
Mfg#:
090743ECS09
In Stock
ON SALE! SAVE 25%
$79.99

This product was last offered at the strikethrough price on
06-13-2026

$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Racing Thermostat - 68C

ES#2765161 - MMTSE3692 - Racing Thermostat - 68C - Modified thermostat for high performance applications - Mishimoto - BMW

Modified thermostat for high performance applications

Brand:
Mishimoto - Corporate Logo
ES#:
2765161
Mfg#:
MMTSE3692
In Stock
$68.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 88°C

ES#205288 - 11537511580 - Thermostat - 88C - Includes sealing O-ring gasket - Mahle-Behr - BMW
ECS Tuning recommends this product.

Includes sealing O-ring gasket

Brand:
Mahle-Behr - Corporate Logo
ES#:
205288
Mfg#:
11537511580
In Stock
$27.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 79C

ES#3023813 - 11537836155 - Thermostat - 79C - Includes sealing gasket - Mahle-Behr - BMW
ECS Tuning recommends this product.

Includes sealing gasket

Brand:
Mahle-Behr - Corporate Logo
ES#:
3023813
Mfg#:
11537836155
In Stock at Vendor
$74.99

This product was last offered at the strikethrough price on
07-08-2026

$64.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

S50 S52 M50 M52 Thermostat Housing

ES#3673391 - 11531722531 - S50 S52 M50 M52 Thermostat Housing - Upgraded aluminum thermostat housing - Bremmen Parts - BMW

Upgraded aluminum thermostat housing 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
3673391
Mfg#:
11531722531
Ships in 5 Business Days
ON SALE! SAVE 22%
$25.99

This product was last offered at the strikethrough price on
05-02-2026

$20.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Water Pump & Thermostat Replacement Kit

ES#4818073 - 11517846361KT3 - Performance Water Pump & Thermostat Replacement Kit - Featuring a Genuine BMW water pump and HT 90*C thermostat! - Assembled By ECS - BMW

Featuring a Genuine BMW water pump and HT 90*C thermostat! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4818073
Mfg#:
11517846361KT3
Ships in 5 Business Days
$494.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

S65 Exact-Fit Silicone Radiator Hoses

ES#4900242 - 008645LA02 - S65 Exact-Fit Silicone Radiator Hoses - Retain OEM fitment with superior looks and durability! Pre-assembled with factory connectors for easy installation. - ECS - BMW

Retain OEM fitment with superior looks and durability! Pre-assembled with factory connectors for easy installation. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4900242
Mfg#:
008645LA02
In Stock
ON SALE!
$177.99

This product was last offered at the strikethrough price on
06-13-2026

$172.65 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 Low Temp Oil Thermostat Kit - 70c

ES#5456347 - 008731KT - N54/N55 Low Temp Oil Thermostat Kit - 70c - New thermostat and spring. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory. - Assembled By ECS - BMW

New thermostat and spring. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5456347
Mfg#:
008731KT
In Stock
ON SALE! SAVE 20%
$74.99

This product was last offered at the strikethrough price on
05-02-2026

$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Thermostat Parts

Your thermostat helps regulate engine temperatures by allowing the coolant to circulate through the radiator once it opens. If it fails, this might mean it never closes, but worst case, it could mean your coolant doesn't get to the radiator. Stay ahead of cooling issues by replacing your thermostat regularly with an OEM thermostat or quality aftermarket thermostat from our selection.

Let us help you find the parts that fit your BMW

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