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BMW Engine Thermostat Parts

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Mechanical Water Pump & Thermostat Kit - Gen1 B58

ES#4780501 - 11518632585KT - Mechanical Water Pump & Thermostat Kit - Gen1 B58 - Includes the water pump (w/o support housing), gaskets, hoses, and the thermostat also known as the "heat management module" - Assembled By ECS - BMW

Includes the water pump (w/o support housing), gaskets, hoses, and the thermostat also known as the "heat management module" 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4780501
Mfg#:
11518632585KT
Ships in 4 Business Days
ON SALE! SAVE 13%
$524.99

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

$457.45 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

N52 Exact-Fit Silicone Radiator Hoses

ES#4830789 - 008641LA02 - N52 Exact-Fit Silicone Radiator Hoses - Retains OEM fitment with superior looks and durability. Pre-assembled with factory connectors for easy installation! - ECS - BMW
ECS Tuning recommends this product.

Retains OEM fitment with superior looks and durability. Pre-assembled with factory connectors for easy installation! 10X Entries For Our 25th Anniversary Sweepstakes!
For SULEV Vehicles with Engine Code N51B30 & Auxiliary Heating (S536A)

Brand:
ECS - Corporate Logo
ES#:
4830789
Mfg#:
008641LA02
In Stock
ON SALE! SAVE 20%
$130.99

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

$104.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Assembly

ES#4781526 - 11538671516 - Thermostat Assembly - Restore proper function to your cooling system - URO - BMW

Restore proper function to your cooling system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4781526
Mfg#:
11538671516
Back Ordered
Auto Notify
$68.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Connector

ES#2744751 - 11118511205 - Connector - Located on the side of the engine block - Genuine BMW - BMW MINI

Located on the side of the engine block

Brand:
Genuine BMW - Corporate Logo
ES#:
2744751
Mfg#:
11118511205
Ships in 4 Business Days
1% off MSRP

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

$37.97

This product was last offered at the strikethrough price on
07-20-2026

$37.50 USD
Free Shipping
on orders $49 and up
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

Thermostat - 71C

ES#3234563 - 11537836155 - Thermostat - 71C - Low temperature thermostat; with sealing gasket. - Gates - BMW

Low temperature thermostat; with sealing gasket.

Brand:
Gates - Corporate Logo
ES#:
3234563
Mfg#:
11537836155
Ships in 3 Business Days
$78.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Water Pump & Thermostat Kit

ES#5425480 - 044952la05KT - Performance Water Pump & Thermostat Kit - Includes ECS N54 400W water pump conversion, 74*C thermostat, installation hardware and coolant! - Assembled By ECS - BMW

Includes ECS N54 400W water pump conversion, 74*C thermostat, installation hardware and coolant! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5425480
Mfg#:
044952LA05KT
In Stock
ON SALE! SAVE 18%
$599.99

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

$489.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

THERMOSTAT

ES#25002 - 11531742964 - THERMOSTAT - Genuine BMW - BMW

Brand:
Genuine BMW - Corporate Logo
ES#:
25002
Mfg#:
11531742964
Ships in 4 Business Days
3% off MSRP

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

$199.99

This product was last offered at the strikethrough price on
07-20-2026

$193.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Return & Thermostat Hose

ES#1897621 - 17127599455 - Heater Return & Thermostat Hose - Replace damaged hoses to stop leaks and make sure your vehicle is running its absolute best - Genuine BMW - BMW

Replace damaged hoses to stop leaks and make sure your vehicle is running its absolute best

Brand:
Genuine BMW - Corporate Logo
ES#:
1897621
Mfg#:
17127599455
Ships in 4 Business Days
2% off MSRP

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

$215.99

This product was last offered at the strikethrough price on
07-20-2026

$211.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

M52TU/M54 Mechanical Thermostat Conversion

ES#4709399 - 008785LA01T - M52TU/M54 Mechanical Thermostat Conversion - Upgrade from your all-in-one plastic thermostat assembly to a stout and reliable billet mechanical thermostat setup! - Turner Motorsport - BMW

Upgrade from your all-in-one plastic thermostat assembly to a stout and reliable billet mechanical thermostat setup! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4709399
Mfg#:
008785LA01T
Ships on Oct 1, 2026
ON SALE!
Starting at $312.37 USD
Customize
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat With Housing

ES#259571 - 11537509227 - Thermostat With Housing - A common item to crack causing leaks - Mahle-Behr - BMW

A common item to crack causing leaks

Brand:
Mahle-Behr - Corporate Logo
ES#:
259571
Mfg#:
11537509227
Ships in 1 Business Day
$103.81 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Water Pump & Thermostat Kit

ES#4818346 - 11537843738KT - Performance Water Pump & Thermostat Kit - Featuring a Genuine BMW water pump and upgraded HT 90*C thermostat! - Assembled By ECS - BMW

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

Brand:
Assembled By ECS - Corporate Logo
ES#:
4818346
Mfg#:
11537843738KT
Ships in 4 Business Days
$614.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Thermostat With Housing

ES#4690251 - 11517805811 - Thermostat With Housing - Includes gasket and O-rings - Bavarian Autosport - BMW

Includes gasket and O-rings 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4690251
Mfg#:
11517805811
In Stock
ON SALE! SAVE 20%
$58.99

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

$47.19 USD
Free Shipping
on orders $49 and up

Junction Heat Hose

ES#3441785 - 11538606278 - Junction Heat Hose - Hose coming off the small fitting on the thermostat - Genuine BMW - BMW

Hose coming off the small fitting on the thermostat

Brand:
Genuine BMW - Corporate Logo
ES#:
3441785
Mfg#:
11538606278
In Stock
5% off MSRP

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

$84.99

This product was last offered at the strikethrough price on
07-20-2026

$80.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Junction Heat Hose

ES#4871933 - 11538606278 - Junction Heat Hose - Hose coming off the small fitting on the thermostat - Bremmen Parts - BMW

Hose coming off the small fitting on the thermostat 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4871933
Mfg#:
11538606278
In Stock
ON SALE! SAVE 21%
$54.99

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

$43.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Filter Housing & Heat Management Module Kit - Level 2

Includes the components needed to replace the two biggest B48 cooling issues, plus most of the "while you are in there" parts we highly recommend replacing - featuring an Aluminum Oil Filter Housing, Coolant Thermostat Module, and coolant pump assembly! 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles without Energy Recovery System (S1CEA)
For later models with the B48 Gen2 (B48D) engine only - Not compatible with earlier Gen1 engines

Brand:
Assembled By ECS - Corporate Logo
ES#:
5425175
Mfg#:
G2XB48DOFHL2KT
Back Ordered
Auto Notify
ON SALE!
$1733.99

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

$1667.65 USD
Free Shipping
on orders $49 and up
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.

Other BMW Engine Thermostat Parts

Let us help you find the parts that fit your BMW

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

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