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BMW 135i Engine Cooling Parts

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N54 Aluminum Coolant Expansion Tank Relocation Kit - 135i

ES#3647096 - 021942TMS14 - N54 Aluminum Coolant Expansion Tank Relocation Kit - 135i - Ditch the weak, factory plastic coolant expansion tank and free up space on the hot side of your engine bay! - Turner Motorsport - BMW

Ditch the weak, factory plastic coolant expansion tank and free up space on the hot side of your engine bay! 10X Entries Into Our F80 M3 Sweepstakes
Compatible with factory/aftermarket cold side intakes as well as hot side intakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
3647096
Mfg#:
021942TMS14
In Stock
ON SALE! SAVE 15%
$815.99

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

$693.59 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Heater Return Line

ES#4772997 - 17127548230 - Heater Return Line - From the heater core to the expansion tank - Bremmen Parts - BMW

From the heater core to the expansion tank 10X Entries Into Our F80 M3 Sweepstakes

For vehicles with automatic transmission

Brand:
Bremmen Parts - Corporate Logo
ES#:
4772997
Mfg#:
17127548230
In Stock
ON SALE! SAVE 15%
$101.99

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

$86.69 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3504771 - 17137640514 - Coolant Expansion Tank - Includes level sensor - Rein - BMW
ECS Tuning recommends this product.

Includes level sensor 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3504771
Mfg#:
17137640514
In Stock
$70.99

This product was last offered at the strikethrough price on
06-22-2026

$70.35 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Aluminized Silicone Water Pump Hose - with clamps

ES#3659542 - 020414ecs01KT - ECS Aluminized Silicone Water Pump Hose - with clamps - The upgrade N52/N54/N55 owners have been waiting for - get rid of that failure-prone water pump to thermostat hose - ECS - BMW

The upgrade N52/N54/N55 owners have been waiting for - get rid of that failure-prone water pump to thermostat hose 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3659542
Mfg#:
020414ECS01KT
In Stock
ON SALE! SAVE 25%
$113.99

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

$85.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Cooling System Refresh Kit - Level 1

ES#3170920 - 11517588885KT3 - ECS Cooling System Refresh Kit - Level 1 - An entry level cooling refresh kit - with high quality aftermarket components - Assembled By ECS - BMW

An entry level cooling refresh kit - with high quality aftermarket components 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with automatic transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
3170920
Mfg#:
11517588885KT3
In Stock
ON SALE! SAVE 24%
$745.99

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

$563.31 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Electric Fan With Shroud - 600W

ES#4213743 - 17427545366 - Electric Fan With Shroud - 600W - If your fan fails your engine will overheat when idling - TYC - BMW

If your fan fails your engine will overheat when idling

Brand:
TYC - Corporate Logo
ES#:
4213743
Mfg#:
17427545366
Ships in 2 Business Days
$392.99

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

$381.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#5435284 - MMWP-N54-07 - Water Pump - Precision-engineered solution for the frequent cooling system failures found in the N54 and N55 engines. - Mishimoto - BMW

Precision-engineered solution for the frequent cooling system failures found in the N54 and N55 engines.

Brand:
Mishimoto - Corporate Logo
ES#:
5435284
Mfg#:
MMWP-N54-07
In Stock
2% off MSRP

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

$393.00

This product was last offered at the strikethrough price on
10-18-2026

$383.99 USD
Free Shipping
on orders $49 and up

Upper Radiator Hose

ES#2802438 - 17127540127 - Upper Radiator Hose - The hose that comes off of the top outlet on the radiator - Rein - BMW

The hose that comes off of the top outlet on the radiator 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802438
Mfg#:
17127540127
In Stock
$40.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

VTT Complete N54 Coolant Hose Kit - Blue

ES#4475785 - VTT-N54-COOLANTB - VTT Complete N54 Coolant Hose Kit - Blue - Coolant hose that last longer than OEM! - Vargas Turbo Technologies - BMW

Coolant hose that last longer than OEM! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Vargas Turbo Technologies - Corporate Logo
ES#:
4475785
Mfg#:
VTT-N54-COOLANTB
Ships on Nov 3, 2026
$464.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

N54 Performance Radiator Kit - Automatic/DCT

ES#4730412 - 17117547059eKT - N54 Performance Radiator Kit - Automatic/DCT - Features A CSF High Performance Radiator and must have upgraded silicone cooling lines needed for a confidence inspiring cooling enhancement. - Assembled By ECS - BMW

Features A CSF High Performance Radiator and must have upgraded silicone cooling lines needed for a confidence inspiring cooling enhancement. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4730412
Mfg#:
17117547059EKT
In Stock
ON SALE!
$1115.99

This product was last offered at the strikethrough price on
06-16-2026

$1092.77 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E9X N54/N55 6MT High-Performance Dual Core Aluminum Radiator

ES#4839753 - 004443LA01 - E9X N54/N55 6MT High-Performance Dual Core Aluminum Radiator - Track-tested and street-readythe ULTIMATE cooling system upgrade for your N54 or N55! - Turner Motorsport - BMW

Track-tested and street-ready—the ULTIMATE cooling system upgrade for your N54 or N55! 10X Entries Into Our F80 M3 Sweepstakes
10X Entries For Our Spin To Win Sweepstakes!
For vehicles with manual transmission only

Brand:
Turner Motorsport - Corporate Logo
ES#:
4839753
Mfg#:
004443LA01
In Stock
ON SALE!
$604.99

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

$586.84 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Turbo Coolant Line Kit

ES#4765882 - 11537558900KT3 - Turbo Coolant Line Kit - Includes all four coolant lines and 1 Gallon of Genuine BMW coolant. - Assembled By ECS - BMW

Includes all four coolant lines and 1 Gallon of Genuine BMW coolant. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4765882
Mfg#:
11537558900KT3
In Stock
ON SALE! SAVE 22%
$253.99

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

$199.22 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

N55 Performance Silicone Radiator Hose Kit - With OE Connectors

ES#5335373 - 018739LA02 - N55 Performance Silicone Radiator Hose Kit - With OE Connectors - Retains OEM fitment with superior looks and durability. Pre-assembled with factory connectors for easy installation! - ECS - BMW

Retains OEM fitment with superior looks and durability. Pre-assembled with factory connectors for easy installation! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
5335373
Mfg#:
018739LA02
In Stock
ON SALE! SAVE 20%
$189.99

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

$151.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat

ES#2142870 - 11537549476 - Thermostat - Restore proper function to your cooling system - Wahler - BMW

Restore proper function to your cooling system

Brand:
Wahler - Corporate Logo
ES#:
2142870
Mfg#:
11537549476
In Stock
$96.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS N54 Silicone Coolant Outlet Hose

ES#3552831 - 025216ECS01 - ECS N54 Silicone Coolant Outlet Hose - Retains OEM fitment with superior looks and durability! - ECS - BMW

Retains OEM fitment with superior looks and durability! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3552831
Mfg#:
025216ECS01
In Stock
ON SALE! SAVE 25%
$80.99

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

$60.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat

ES#2681810 - 11537601158 - Thermostat - Restore proper function to your cooling system - Wahler - BMW
ECS Tuning recommends this product.

Restore proper function to your cooling system

Brand:
Wahler - Corporate Logo
ES#:
2681810
Mfg#:
11537601158
In Stock
$121.98

This product was last offered at the strikethrough price on
07-27-2026

$103.52 USD
Free Shipping
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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