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BMW E90 335i N55 3.0L

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BMW E90 335i N55 3.0L Engine Cooling Parts

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N55 Heavy Duty Aluminum Expansion Tank Kit

ES#4817875 - 050610LA02 - N55 Heavy Duty Aluminum Expansion Tank Kit - The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. - Turner Motorsport - BMW
ECS Tuning recommends this product.

The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4817875
Mfg#:
050610LA02
Ships on Aug 14, 2026
Auto Notify
ON SALE! SAVE 30%
$448.99

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

$314.29 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 BMW Automatic Transmission Cooler - 335

ES#4368587 - N54N55TransCool - N54/N55 BMW Automatic Transmission Cooler - 335 - Keep your automatic transmission temperatures under control - Burger Motorsports - BMW

Keep your automatic transmission temperatures under control affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Burger Motorsports - Corporate Logo
ES#:
4368587
Mfg#:
N54N55TRANSCOOL
In Stock
$444.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Radiator - For Manual Transmission

ES#3545369 - 3716 - Radiator - For Manual Transmission - Standard replacement radiator - CSF - BMW

Standard replacement radiator affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
CSF - Corporate Logo
ES#:
3545369
Mfg#:
3716
In Stock
$109.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pentofrost Coolant - 1 Gallon (3.78 Liters)

ES#4845732 - 8114308 - Pentofrost Coolant - 1 Gallon (3.78 Liters) - Blue G11/G48 Coolant Pre-Mixed 50/50 - Pentosin - BMW Mercedes Benz MINI

Blue G11/G48 Coolant Pre-Mixed 50/50 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Pentosin - Corporate Logo
ES#:
4845732
Mfg#:
8114308
In Stock
$20.99 USD
Free Shipping
on orders $49 and up

Water Pump - N54/N55

ES#4872219 - 11515A05704 - Water Pump - N54/N55 - N54 and N55 engines are prone to water pump failure - replace every 60,000 miles. - Geba - BMW

N54 and N55 engines are prone to water pump failure - replace every 60,000 miles. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Geba - Corporate Logo
ES#:
4872219
Mfg#:
11515A05704
In Stock
$332.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 BMW Automatic Transmission Cooler - 335 W/Thermostat

ES#4714975 - BMS-335-TC-WTH - N54/N55 BMW Automatic Transmission Cooler - 335 W/Thermostat - Keep your automatic transmission temperatures under control - Burger Motorsports - BMW

Keep your automatic transmission temperatures under control affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Burger Motorsports - Corporate Logo
ES#:
4714975
Mfg#:
BMS-335-TC-WTH
In Stock
$573.00 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Precision Raceworks - Corporate Logo
ES#:
4880971
Mfg#:
601-0003
In Stock
$24.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary 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

Performance Aluminum Radiator

ES#2766393 - MMRADE9007 - Performance Aluminum Radiator - Fully brazed two-row aluminum core with TIG-welded end tanks - Mishimoto - BMW

Fully brazed two-row aluminum core with TIG-welded end tanks affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
35% increase in coolant capacity with a 25% increase in core thickness!
For vehicles with manual transmission only

Brand:
Mishimoto - Corporate Logo
ES#:
2766393
Mfg#:
MMRADE9007
In Stock
$559.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 Performance Stepped Intercooler

ES#4920130 - 004253LA02 - N54/N55 Performance Stepped Intercooler - Increased charge air volume and inflow area delivering lower intake air temperatures and increased performance. - Turner Motorsport - BMW

Increased charge air volume and inflow area delivering lower intake air temperatures and increased performance. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4920130
Mfg#:
004253LA02
In Stock
ON SALE! SAVE 15%
$469.02

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

$398.67 USD
Free Shipping

Heater Return Line

ES#38447 - 17127548230 - Heater Return Line - From the heater core to the expansion tank - Genuine BMW - BMW

From the heater core to the expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
38447
Mfg#:
17127548230
In Stock
$173.23

This product was last offered at the strikethrough price on
01-07-2026

$173.21 USD
Free Shipping
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with automatic transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
3170920
Mfg#:
11517588885KT3
Ships on Jul 7, 2026
Auto Notify
ON SALE! SAVE 20%
$747.99

This product was last offered at the strikethrough price on
01-03-2026

$598.49 USD
Free Shipping
This product is lifetime replacement eligible Partial 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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!
For vehicles with manual transmission only

Brand:
Turner Motorsport - Corporate Logo
ES#:
4839753
Mfg#:
004443LA01
Ships on Sep 14, 2026
Auto Notify
ON SALE!
$592.99

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

$575.01 USD
Free Shipping
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3659542
Mfg#:
020414ECS01KT
In Stock
ON SALE! SAVE 40%
$110.99

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

$66.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Temperature Sensor

ES#34326 - 13621433076 - Temperature Sensor - Monitors coolant / oil temperature - Genuine BMW - BMW

Monitors coolant / oil temperature affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
34326
Mfg#:
13621433076
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.

$66.05

This product was last offered at the strikethrough price on
01-08-2026

$55.45 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#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. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4817856
Mfg#:
N54N55LTKT
Back Ordered
Auto Notify
ON SALE! SAVE 20%
$152.99

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

$122.38 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.

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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