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BMW E36 325i M50 2.5L

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BMW E36 325i M50 2.5L Engine Thermostat Parts

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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

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

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 2 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

Aluminum Thermostat Housing

ES#205285 - 11531722531 - Aluminum Thermostat Housing - Aluminum construction for improved durability over stock design! For your M50, M52, S50, or S54 Engine. - URO Premium - BMW
ECS Tuning recommends this product.

Aluminum construction for improved durability over stock design! For your M50, M52, S50, or S54 Engine. 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO Premium - Corporate Logo
ES#:
205285
Mfg#:
11531722531
In Stock
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80C

ES#2712776 - 11531713040 - Thermostat - 80C - Includes sealing o-ring - Vemo - BMW
ECS Tuning recommends this product.

Includes sealing o-ring

Brand:
Vemo - Corporate Logo
ES#:
2712776
Mfg#:
11531713040
In Stock
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Electric Fan Conversion Kit

ES#2855348 - e36fndkt6KT7 - Electric Fan Conversion Kit - Free up some extra horsepower by replacing your fan with a Mishimoto e-fan - Assembled By ECS - BMW

Free up some extra horsepower by replacing your fan with a Mishimoto e-fan 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with production date up to 09/1995

Brand:
Assembled By ECS - Corporate Logo
ES#:
2855348
Mfg#:
E36FNDKT6KT7
In Stock
$329.99

This product was last offered at the strikethrough price on
07-02-2026

$308.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Auxiliary Thermostat

ES#4760000 - 13541730682 - Auxiliary Thermostat - Thermostat that controls water flow temperature to the throttle body - Bremmen Parts - BMW

Thermostat that controls water flow temperature to the throttle body 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4760000
Mfg#:
13541730682
Ships on Sep 22, 2026
Auto Notify
$64.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#3202801 - 11531730470 - Thermostat Housing - Keep your car running at the proper temperature. - URO - BMW

Keep your car running at the proper temperature. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat! For vehicles made in 09/1987 only

Brand:
URO - Corporate Logo
ES#:
3202801
Mfg#:
11531730470
In Stock
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 88�C

ES#25085 - 11537511580 - Thermostat - 88C - Common point of failure in the cooling system. - Genuine BMW - BMW

Common point of failure in the cooling system.

Brand:
Genuine BMW - Corporate Logo
ES#:
25085
Mfg#:
11537511580
In Stock
3% off MSRP

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

$59.99

This product was last offered at the strikethrough price on
07-24-2026

$57.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 75*C

ES#4730406 - 11537511580 - Thermostat - 75*C - If you own a classic M50, M52, or S52-powered BMW, you already know that keeping the engine cooling system happy is the golden rule of ownership. - Wahler - BMW

If you own a classic M50, M52, or S52-powered BMW, you already know that keeping the engine cooling system happy is the golden rule of ownership.

Brand:
Wahler - Corporate Logo
ES#:
4730406
Mfg#:
11537511580
In Stock at Vendor
$60.99

This product was last offered at the strikethrough price on
05-07-2026

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

Thermostat Housing

ES#2867281 - 11531722531 - Thermostat Housing - Replacement plastic thermostat housing - Febi - BMW

Replacement plastic thermostat housing 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2867281
Mfg#:
11531722531
In Stock at Vendor
$53.42 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 92C

ES#2895484 - 11537511083 - Thermostat - 92C - Includes gasket - Vemo - BMW

Includes gasket

Brand:
Vemo - Corporate Logo
ES#:
2895484
Mfg#:
11537511083
In Stock at Vendor
$35.99

This product was last offered at the strikethrough price on
05-07-2026

$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 92C

ES#3032192 - 11537511083 - Thermostat - 92C - Includes o-ring - Mahle - BMW

Includes o-ring

Brand:
Mahle - Corporate Logo
ES#:
3032192
Mfg#:
11537511083
Ships in 9 Business Days
$29.99

This product was last offered at the strikethrough price on
05-21-2026

$27.68 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#24568 - 11531265084 - Thermostat O-Ring - Seals thermostat to cylinder head - Genuine BMW - BMW

Seals thermostat to cylinder head

Brand:
Genuine BMW - Corporate Logo
ES#:
24568
Mfg#:
11531265084
In Stock
$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ultimate Fan Delete Kit

ES#2739354 - E36FNDU2KT - Ultimate Fan Delete Kit - Free up some extra horsepower by deleting your fan - with upgraded aluminum thermostat housing, fan delete nut and ECS Aluminum Water Pump Pulley - Assembled By ECS - BMW

Free up some extra horsepower by deleting your fan - with upgraded aluminum thermostat housing, fan delete nut and ECS Aluminum Water Pump Pulley 10X Entries For Our 25th Anniversary Sweepstakes!
Gain peace of mind - no more worrying about exploding fans and seizing fan clutches

Brand:
Assembled By ECS - Corporate Logo
ES#:
2739354
Mfg#:
E36FNDU2KT
In Stock
ON SALE!
$250.99

This product was last offered at the strikethrough price on
07-02-2026

$231.01 USD
Free Shipping
This product is lifetime replacement eligible Partial 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.

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Manufacturer names and/or part numbers are used only for identification purposes.

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