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BMW 335i Engine Cooling Parts

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N54 Performance Radiator Kit - Manual Transmission

ES#4730418 - 17117558480EKT - N54 Performance Radiator Kit - Manual Transmission - 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 For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4730418
Mfg#:
17117558480EKT
In Stock
ON SALE!
$1048.99

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

$1045.27 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose - Return Line

ES#2578088 - 17128570061 - Coolant Hose - Return Line - Connects expansion tank to coolant hose feeding into radiator - Genuine BMW - BMW

Connects expansion tank to coolant hose feeding into radiator

Brand:
Genuine BMW - Corporate Logo
ES#:
2578088
Mfg#:
17128570061
In Stock
9% off MSRP

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

$54.77

This product was last offered at the strikethrough price on
07-18-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Water Pump

ES#4726424 - 11517583965 - Auxiliary Water Pump - Replace your failure prone electric water pump with a high quality aftermarket unit and restore cooling system functionality - Pierburg - BMW

Replace your failure prone electric water pump with a high quality aftermarket unit and restore cooling system functionality

Brand:
Pierburg - Corporate Logo
ES#:
4726424
Mfg#:
11517583965
In Stock
$221.99 USD
Free Shipping
on orders $49 and up

Thermostat

ES#25121 - 11537549476 - Thermostat - Restore proper function to your cooling system - Genuine BMW - BMW

Restore proper function to your cooling system

Brand:
Genuine BMW - Corporate Logo
ES#:
25121
Mfg#:
11537549476
In Stock
16% off MSRP

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

$316.79

This product was last offered at the strikethrough price on
07-18-2026

$265.77 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 Low Temp Oil Thermostat Kit - 70c

ES#4817856 - n54n55ltKT - N54/N55 Low Temp Oil Thermostat Kit - 70c - New billet thermostat cover, hardware and gasket. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory. - Assembled By ECS - BMW

New billet thermostat cover, hardware and gasket. 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#:
4817856
Mfg#:
N54N55LTKT
Back Ordered
Auto Notify
ON SALE! SAVE 18%
$152.99

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

$125.58 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Core Supply Hose

ES#4759034 - 64216983858 - Heater Core Supply Hose - Connects the coolant flange to the heater core - URO - BMW

Connects the coolant flange to the heater core 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4759034
Mfg#:
64216983858
In Stock
$44.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Electric Fan With Shroud

ES#4872470 - 17427545366 - Electric Fan With Shroud - Continental - BMW

We Price Match - Give Us A Call or Chat!

Brand:
Continental - Corporate Logo
ES#:
4872470
Mfg#:
17427545366
In Stock at Vendor
$560.99

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

$544.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Low Temperature Thermostat - 97C

ES#4760003 - 11537601158-97C - Low Temperature Thermostat - 97C - Low-temp thermostat reduces stresses on engine components and improves performance - Bremmen Parts - BMW

Low-temp thermostat reduces stresses on engine components and improves performance 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4760003
Mfg#:
11537601158-97C
In Stock
ON SALE! SAVE 20%
$95.99

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

$76.70 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Coolant Line Kit

ES#2966439 - 11537558900KT - Turbo Coolant Line Kit - Includes turbo coolant lines and 1 liter of coolant to make sure your turbos are getting the needed amount of cooling - Genuine BMW - BMW

Includes turbo coolant lines and 1 liter of coolant to make sure your turbos are getting the needed amount of cooling

Brand:
Genuine BMW - Corporate Logo
ES#:
2966439
Mfg#:
11537558900KT
In Stock
$579.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

MSL Oil Thermostat Hardware

ES#4772301 - 030210011 - MSL Oil Thermostat Hardware - Grade 5 Titanium M8 hardware for use with MSL Oil Thermostats - Mosselman Turbosystems - BMW

Grade 5 Titanium M8 hardware for use with MSL Oil Thermostats

Brand:
Mosselman Turbosystems - Corporate Logo
ES#:
4772301
Mfg#:
030210011
Ships in 1 Business Day
$25.99 USD
Free Shipping
on orders $49 and up

ECS Cooling System Refresh Kit - Level 2

ES#2597716 - 11510392553RKT - ECS Cooling System Refresh Kit - Level 2 - A more advanced refresh kit - with primary cooling system hoses and accessory belt - Assembled By ECS - BMW

A more advanced refresh kit - with primary cooling system hoses and accessory belt 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with automatic or DCT transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2597716
Mfg#:
11510392553RKT
Back Ordered
Auto Notify
ON SALE! SAVE 19%
$832.99

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

$672.89 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Radiator

ES#3545375 - 3725 - Radiator - Standard OE style replacement radiator - CSF - BMW

Standard OE style replacement radiator 2X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with automatic transmission (S205A or S2TBA) and M Sport Package (P337A) only

Brand:
CSF - Corporate Logo
ES#:
3545375
Mfg#:
3725
In Stock
$95.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

D088 BMW Radiator - E9X E82 E89

ES#4656928 - WC370 - D088 BMW Radiator - E9X E82 E89 - Let your engine breathe better with this DO88 Radiator! - DO88 - BMW

Let your engine breathe better with this DO88 Radiator! For automatics only

Brand:
DO88 - Corporate Logo
ES#:
4656928
Mfg#:
WC370
In Stock
Limited Qty Sale
$642.99

This product was last offered at the strikethrough price on
07-06-2026

$551.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Cooling System Refresh Kit - Level 1

ES#2597785 - 11517588885RKT - ECS Cooling System Refresh Kit - Level 1 - An entry level cooling refresh kit - with OEM & high quality aftermarket components - Assembled By ECS - BMW

An entry level cooling refresh kit - with OEM & high quality aftermarket components 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with manual transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2597785
Mfg#:
11517588885RKT
In Stock
ON SALE! SAVE 24%
$710.99

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

$537.08 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Coolant Expansion Tank

ES#2718215 - 17137640514 - Coolant Expansion Tank - Includes level sensor - Genuine BMW - BMW

Includes level sensor

Brand:
Genuine BMW - Corporate Logo
ES#:
2718215
Mfg#:
17137640514
In Stock
6% off MSRP

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

$189.99

This product was last offered at the strikethrough price on
06-05-2026

$178.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Pipe - Return

ES#38984 - 17227567208 - Oil Cooler Pipe - Return - Keep your circulating oil cool and your engine healthy - Genuine BMW - BMW

Keep your circulating oil cool and your engine healthy For vehicles with high speed synchronisation

Brand:
Genuine BMW - Corporate Logo
ES#:
38984
Mfg#:
17227567208
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.

$249.71

This product was last offered at the strikethrough price on
07-18-2026

$245.20 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

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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