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BMW E46 Engine Cooling Parts

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E46 M3 Coolant Expansion Tank

ES#38023 - 17112283344 - E46 M3 Coolant Expansion Tank - Plastic expansion tank, including sealing cap - Genuine BMW - BMW

Plastic expansion tank, including sealing cap

Brand:
Genuine BMW - Corporate Logo
ES#:
38023
Mfg#:
17112283344
In Stock
7% off MSRP

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

$215.23

This product was last offered at the strikethrough price on
10-23-2026

$199.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Assembly With Aluminum Housing

ES#4877251 - 11537509227PRM - Thermostat Assembly With Aluminum Housing - Aluminum Housing vs OEM Plastic - includes Thermostat & Gasket - URO Premium - BMW

Aluminum Housing vs OEM Plastic - includes Thermostat & Gasket 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO Premium - Corporate Logo
ES#:
4877251
Mfg#:
11537509227PRM
In Stock
$89.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Clutch

ES#205243 - 11527831619 - Radiator Fan Clutch - Direct replacement - Mahle-Behr - BMW
ECS Tuning recommends this product.

Direct replacement

Brand:
Mahle-Behr - Corporate Logo
ES#:
205243
Mfg#:
11527831619
In Stock
$298.99

This product was last offered at the strikethrough price on
08-13-2026

$172.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat With Housing

ES#25078 - 11537509227 - Thermostat With Housing - A common item to crack causing leaks - Genuine BMW - BMW

A common item to crack causing leaks

Brand:
Genuine BMW - Corporate Logo
ES#:
25078
Mfg#:
11537509227
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.

$174.45

This product was last offered at the strikethrough price on
10-23-2026

$169.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BMW Fan Clutch Wrench Set

ES#4000865 - CTAA886L - BMW Fan Clutch Wrench Set - 32mm Wrench removes the lock nuts on the thermo-viscous fan, while the other holds the water pump pulley while loosening the radiator fan - CTA Tools - BMW

32mm Wrench removes the lock nuts on the thermo-viscous fan, while the other holds the water pump pulley while loosening the radiator fan

Brand:
CTA Tools - Corporate Logo
ES#:
4000865
Mfg#:
CTAA886L
In Stock
$52.17 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 M3 Auxiliary Fan Assembly - With Frame

ES#180300 - 64546988914 - E46 M3 Auxiliary Fan Assembly - With Frame - Mounted in front of the radiator, referred to by BMW as the "Pusher Fan" - Genuine BMW - BMW

Mounted in front of the radiator, referred to by BMW as the "Pusher Fan"

Brand:
Genuine BMW - Corporate Logo
ES#:
180300
Mfg#:
64546988914
Ships in 1-2 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.

$938.99

This product was last offered at the strikethrough price on
10-23-2026

$915.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Performance Cooling System Refresh Kit - Level 3

ES#4908058 - 008682LA02-RF3KT - Performance Cooling System Refresh Kit - Level 3 - An all-inclusive service and upgrade kit, featuring high-performance components for increased cooling capacity! - Assembled By ECS - BMW

An all-inclusive service and upgrade kit, featuring high-performance components for increased cooling capacity! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4908058
Mfg#:
008682LA02-RF3KT
Ships on Dec 18, 2026
ON SALE!
$1831.86 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Heater Inlet Pipe

ES#4304643 - 11531705210 - Heater Inlet Pipe - Runs from the front left side of the engine to the heater inlet - Bavarian Autosport - BMW
ECS Tuning recommends this product.

Runs from the front left side of the engine to the heater inlet 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304643
Mfg#:
11531705210
In Stock
ON SALE! SAVE 20%
$40.99

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

$32.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sport Fan Clutch

ES#3438875 - 14-010 - Sport Fan Clutch - More efficient cooling! - Active Autowerke - BMW

More efficient cooling!

Brand:
Active Autowerke - Corporate Logo
ES#:
3438875
Mfg#:
14-010
Ships in 1 Business Day
5% off MSRP

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

$259.00

This product was last offered at the strikethrough price on
10-23-2026

$246.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pipe

ES#4304672 - 11537502525 - Water Pipe - Connects return hose to engine block - Bavarian Autosport - BMW
ECS Tuning recommends this product.

Connects return hose to engine block 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304672
Mfg#:
11537502525
In Stock
ON SALE! SAVE 20%
$50.99

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

$40.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Mounting Plate

ES#4304676 - 17111436250 - Expansion Tank Mounting Plate - Mounts to the side of the radiator for retaining the expansion tank - Bavarian Autosport - BMW

Mounts to the side of the radiator for retaining the expansion tank 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with a manual transmission only

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304676
Mfg#:
17111436250
In Stock
ON SALE! SAVE 20%
$44.99

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

$35.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 Radiator Hose - Upper

ES#4304688 - 17127510952 - E46 Radiator Hose - Upper - A common source of cooling system failure - Bremmen Parts - BMW
ECS Tuning recommends this product.

A common source of cooling system failure 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
4304688
Mfg#:
17127510952
In Stock
ON SALE! SAVE 34%
$34.99

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

$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

New Water Pump - With O-Ring

ES#205358 - 11517527910 - New Water Pump - With O-Ring - Featuring a metal impeller - Graf - BMW

Featuring a metal impeller

Brand:
Graf - Corporate Logo
ES#:
205358
Mfg#:
11517527910
In Stock
$76.69

This product was last offered at the strikethrough price on
05-09-2026

$71.77 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Complete Cooling System Hose Kit

ES#2597226 - 11531436408KT - Complete Cooling System Hose Kit - A complete hose kit including coolant - Genuine BMW - BMW

A complete hose kit including coolant

Brand:
Genuine BMW - Corporate Logo
ES#:
2597226
Mfg#:
11531436408KT
Ships in 1-2 days
$548.99

This product was last offered at the strikethrough price on
06-03-2026

$546.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

ECS Cooling System Refresh Kit - Level 3

ES#2228846 - 17119071519KT2 - ECS Cooling System Refresh Kit - Level 3 - The ultimate cooling refresh kit - with aftermarket components, featuring an ECS Aluminum Pulley and a GEBA water pump - Assembled By ECS - BMW

The <font color='red'> ultimate</font> cooling refresh kit - with aftermarket components, featuring an ECS Aluminum Pulley and a GEBA water pump 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with a production date from 09/2002

Brand:
Assembled By ECS - Corporate Logo
ES#:
2228846
Mfg#:
17119071519KT2
Ships in 1 Business Day
ON SALE! SAVE 11%
$951.99

This product was last offered at the strikethrough price on
08-15-2026

$850.47 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Water Pipe

ES#4069274 - 11537502525 - Water Pipe - Connects return hose to engine block - Rein - BMW

Connects return hose to engine block 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4069274
Mfg#:
11537502525
In Stock
$55.99

This product was last offered at the strikethrough price on
10-22-2026

$55.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Cooling Parts

Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.

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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