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BMW 335i Performance Cooling Parts

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Mosselman Billet Oil Thermostat - N55 - Silver

ES#4446094 - OTN55.T85 - Mosselman Billet Oil Thermostat - N55 - Silver - The MSL thermostat ensures a cooler oil temperature which will result in more stable performance - Mosselman Turbosystems - BMW

The MSL thermostat ensures a cooler oil temperature which will result in more stable performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mosselman Turbosystems - Corporate Logo
ES#:
4446094
Mfg#:
OTN55.T85
In Stock
$379.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

N54 Aluminum Coolant Expansion Tank Relocation Kit - 335i

ES#3647095 - 021942tms13 - N54 Aluminum Coolant Expansion Tank Relocation Kit - 335i - Ditch the weak, factory plastic coolant expansion tank and free up space on the hot side of your engine bay! - Turner Motorsport - BMW
ECS Tuning recommends this product.

Ditch the weak, factory plastic coolant expansion tank and free up space on the hot side of your engine bay! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Compatible with factory/aftermarket cold side intakes as well as hot side intakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
3647095
Mfg#:
021942TMS13
Ships on Aug 10, 2026
Auto Notify
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

High Performance Aluminum Radiator

ES#3477929 - 7078 - High Performance Aluminum Radiator - Featuring an all-aluminum tank and core. Lower engine temperatures mean more power and longer life of engine components! - CSF - BMW

Featuring an all-aluminum tank and core. Lower engine temperatures mean more power and longer life of engine components! 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#:
3477929
Mfg#:
7078
In Stock
$645.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

Brand:
ECS - Corporate Logo
ES#:
3552811
Mfg#:
024797ECS01
In Stock
ON SALE! SAVE 25%
$74.99

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

$56.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

N54/N55 Billet Oil Cooler Housing

ES#4809843 - 008731la01KT - N54/N55 Billet Oil Cooler Housing - Reduce oil temperatures with the upgraded billet housing and low-temp thermostat! Allows you to add an oil cooler to your vehicle that didn't have the factory option. - Turner Motorsport - BMW

Reduce oil temperatures with the upgraded billet housing and low-temp thermostat! Allows you to add an oil cooler to your vehicle that didn't have the factory option. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4809843
Mfg#:
008731LA01KT
In Stock
ON SALE! SAVE 25%
$336.80

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

$252.60 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mosselman Billet Oil Thermostat - N54 & E8x E9x N55

ES#4446095 - OTN54.T85 - Mosselman Billet Oil Thermostat - N54 & E8x E9x N55 - The MSL thermostat ensures a cooler oil temperature which will result in more stable performance - Mosselman Turbosystems - BMW

The MSL thermostat ensures a cooler oil temperature which will result in more stable performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mosselman Turbosystems - Corporate Logo
ES#:
4446095
Mfg#:
OTN54.T85
In Stock
$379.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mosselman Billet Oil Thermostat With Installation Kit

ES#4772311 - otn54.t85KT - Mosselman Billet Oil Thermostat With Installation Kit - The MSL thermostat ensures a cooler oil temperature which will result in more stable performance - Mosselman Turbosystems - BMW

The MSL thermostat ensures a cooler oil temperature which will result in more stable performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mosselman Turbosystems - Corporate Logo
ES#:
4772311
Mfg#:
OTN54.T85KT
In Stock
$432.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Universal Oil Cooler - 19 Row - Black

ES#2764102 - MM0CULBK - Universal Oil Cooler - 19 Row - Black - Serious engine oil cooling for the most demanding engines - Mishimoto - Audi BMW Volkswagen MINI

Serious engine oil cooling for the most demanding engines affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For custom applications only. Not a direct bolt on.

Brand:
Mishimoto - Corporate Logo
ES#:
2764102
Mfg#:
MM0CULBK
In Stock
$536.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Race-Spec Oil Cooler

ES#4147445 - 8145 - Race-Spec Oil Cooler - Keep oil temps low on or off the track! - CSF - BMW

Keep oil temps low on or off the track! 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#:
4147445
Mfg#:
8145
In Stock
$399.00 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

Water Wetter Coolant Additive - 12oz

ES#261427 - 80204 - Water Wetter Coolant Additive - 12oz - Reduces coolant temperatures by as much as 30*F - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Reduces coolant temperatures by as much as 30*F affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Redline - Corporate Logo
ES#:
261427
Mfg#:
80204
In Stock
$15.99 USD
Free Shipping
on orders $49 and up

race-spec DCT/6speed Transmission oil cooler

ES#2992678 - 8042 - race-spec DCT/6speed Transmission oil cooler - Dual pass transmission cooling with 30% efficiency improvement versus the OEM cooler. True plug-and-play! No modifications - just better performance! - CSF - BMW

Dual pass transmission cooling with 30% efficiency improvement versus the OEM cooler. True plug-and-play! No modifications - just better performance! 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#:
2992678
Mfg#:
8042
In Stock
$449.00 USD
Free Shipping
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. 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#:
4730412
Mfg#:
17117547059EKT
In Stock
ON SALE!
$1098.99

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

$1065.33 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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. 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#:
4730418
Mfg#:
17117558480EKT
In Stock
ON SALE!
$1048.99

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

$995.87 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime 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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
5335373
Mfg#:
018739LA02
In Stock
ON SALE! SAVE 20%
$185.99

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

$148.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 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

$671.98 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

More About Performance Cooling Parts

Upgrade your cooling system with a bigger, more efficient, radiator, electric fan conversion, water pump, lower-temperature thermostat, and cooling system additives to combat the enemy of performance.

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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