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BMW 328i Engine Coolant Flanges & Parts

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ECS Billet Cylinder Head Outlet Hose Adapter

ES#3552811 - 024797ECS01 - ECS Billet Cylinder Head Outlet Hose Adapter - Upgrade to a much more durable connection from your cylinder head to your thermostat! Commonly referred to as a "Mickey Mouse" flange/adapter. - ECS - BMW

Upgrade to a much more durable connection from your cylinder head to your thermostat! Commonly referred to as a "Mickey Mouse" flange/adapter. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3552811
Mfg#:
024797ECS01
In Stock
ON SALE! SAVE 25%
$76.99

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

$57.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BMP Cylinder Head Coolant Flange

ES#4880971 - 601-0003 - BMP Cylinder Head Coolant Flange - Replaces the stock plastic flange found in the thermostat to cylinder head coolant hose that is known to fail - Precision Raceworks - BMW

Replaces the stock plastic flange found in the thermostat to cylinder head coolant hose that is known to fail

Brand:
Precision Raceworks - Corporate Logo
ES#:
4880971
Mfg#:
601-0003
In Stock
$24.99 USD
Free Shipping
on orders $49 and up

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 W/ Housing & Sensor

ES#5435334 - MMTS-E46-99E - Thermostat W/ Housing & Sensor - Designed to restore original cooling performance, making it an essential component for routine maintenance or emergency repair. - Mishimoto - BMW

Designed to restore original cooling performance, making it an essential component for routine maintenance or emergency repair.

Brand:
Mishimoto - Corporate Logo
ES#:
5435334
Mfg#:
MMTS-E46-99E
Ships in 1-3 days
$91.99 USD
Free Shipping
on orders $49 and up

O-Ring - Priced Each

ES#3674114 - C32348 - O-Ring - Priced Each - Measurements: 20x3 - Victor Reinz - BMW

Measurements: 20x3

Brand:
Victor Reinz - Corporate Logo
ES#:
3674114
Mfg#:
C32348
Ships in 3 Business Days
$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-ring - Priced Each

ES#4066943 - 11531703848 - O-ring - Priced Each - 18.2x3. Used in the cooling system - Victor Reinz - BMW
ECS Tuning recommends this product.

18.2x3. Used in the cooling system

Brand:
Victor Reinz - Corporate Logo
ES#:
4066943
Mfg#:
11531703848
Ships in 1 Business Day
$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Flange - Rear/Engine Block

ES#4327207 - 11531708808 - Coolant Flange - Rear/Engine Block - Keep your BMWs cooling system performing at its peak with this premium replacement coolant flange from Meyle. - Meyle - BMW

Keep your BMW’s cooling system performing at its peak with this premium replacement coolant flange from Meyle. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Fits European models only

Brand:
Meyle - Corporate Logo
ES#:
4327207
Mfg#:
11531708808
Special Order: No Guaranteed ETA
$9.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Coolant Flanges & Parts

Replace a cracked or failed coolant flange with a brand new coolant flange to stop those leaks!

Let us help you find the parts that fit your BMW

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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