Home
Cooling

BMW Cooling System Parts & Accessories for BMW E90 M3 S65 4.0L

Clear BMW chassis

The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

Sub-Categories

Sort By:

Water Pump And Thermostat Kit - E9X M3

10X Entries Into Our F80 M3 Sweepstakes

T#:554059

Part#: 11517838201KT4

Ships in 1 Business Day

Sale - Save 9% $ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 202.73 USD

Add to Wish List

Qty

Sale - Save 9%

$ 222.99

This product was last offered at the strikethrough price on
05-03-2026

$ 202.73 USD

Add to Wish List

The water pumps in BMW's should be serviced near 80,000 miles and may become an issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road.

Show More Show Less

Thermostat Replacement Kit - E9X M3

10X Entries Into Our F80 M3 Sweepstakes

T#:554084

Part#: 11537836155KT2

Ships in 1 Business Day

Sale - Save 14% $ 99.99

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

$ 86.04 USD

Add to Wish List

Qty

Sale - Save 14%

$ 99.99

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

$ 86.04 USD

Add to Wish List

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Basic Cooling System Service Kit - E9X M3 S65

10X Entries Into Our F80 M3 Sweepstakes

T#:557214

Part#: E9XM3BCKT

Ships in 1-2 days

$ 567.99

This product was last offered at the strikethrough price on
07-08-2026

$ 552.99 USD

Add to Wish List

Qty

$ 552.99 USD

Add to Wish List

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

Show More Show Less

High Performance Cooling System Upgrade - E9X M3 (04/2008+)

10X Entries Into Our F80 M3 Sweepstakes

T#:557320

Part#: E9XM3PCKT

Ships in 1-2 days

$ 2,336.08

This product was last offered at the strikethrough price on
08-24-2026

$ 2,332.08 USD

Add to Wish List

Qty

$ 2,332.08 USD

Add to Wish List

To ensure your BMW keeps cool on the track, we have built out our new High Performance Cooling System Upgrade kits. Featured in this kit is everything you will need to redo your cooling system from top to bottom with OEM components, with select stock components swapped out for the high performance alternative!

Show More Show Less

High Performance Cooling System Upgrade - E9X M3 (up to 04/2008) ...

10X Entries Into Our F80 M3 Sweepstakes

T#:557321

Part#: E9XM3PCKT2

Ships in 1-2 days

$ 2,322.15

This product was last offered at the strikethrough price on
08-24-2026

$ 2,318.15 USD

Add to Wish List

Qty

$ 2,318.15 USD

Add to Wish List

To ensure your BMW keeps cool on the track, we have built out our new High Performance Cooling System Upgrade kits. Featured in this kit is everything you will need to redo your cooling system from top to bottom with OEM components, with select stock components swapped out for the high performance alternative!

Show More Show Less

Genuine BMW Expansion Tank - E90,E92,E93 M3

T#:22515

Part#: 17112283500

Ships in 1-2 days

6% off MSRP $ 266.99

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

$ 251.99 USD

Add to Wish List

Qty

6% off MSRP

$ 266.99

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

$ 251.99 USD

Add to Wish List

This high-quality Genuine BMW expansion tank is used on the S65 V8 engines and is a common failure item. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.

Show More Show Less

Red Line Supercool Performance Coolant - Concentrate - 1 Gallon ...

T#:640437

Part#: 81205

In Stock

$ 68.99 USD

Add to Wish List

Qty

$ 68.99 USD

Add to Wish List

Red Line SuperCool Concentrate fortified with WaterWetter is a concentrated antifreeze/coolant designed to maximize the performance of your cooling system with superior protection against cavitation corrosion/erosion. Using SuperCool Concentrate diluted with distilled water protects the entire cooling system keeping new components like new for 5 years/150,000 miles and prevents further damage to older components. Red Line’s proprietary coolant additive formula enhances the fluid’s ability to transfer heat, reducing operating temperatures by up to 20*F and prolonging the life of the entire cooling system. Red Line's SuperCool is an OAT coolant that is a Nitrate and Silicate Free product with its own proprietary corrosion technology to offer superior protection for aluminum engines found in all European vehicles, performance vehicles, as well as other applications. SuperCool will not void the factory warranty either. It can be used to top off the existing coolant of any BMW and will not cause any ill-effects on the cooling system because it is silicate and nitrate free. It is still better to flush it out and switch completely to SuperCool to get all the full benefits of the product in performance and protection.

Show More Show Less

Genuine BMW Coolant Expansion Tank Return Hose - E9x M3

T#:22341

Part#: 11537838215

Ships in 1-2 days

9% off MSRP $ 125.99

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

$ 114.99 USD

Add to Wish List

Qty

9% off MSRP

$ 125.99

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

$ 114.99 USD

Add to Wish List

This is the coolant reservoir expansion tank return hose that connects to the bottom of the expansion tank.

This item fits the following BMWs:
2008-2011 E90 BMW M3 - Sedan
2008-2013 E92 BMW M3 - Coupe
2008-2013 E93 BMW M3 - Convertible

Show More Show Less

Genuine BMW Water Pump Pulley - E9X M3 S65

T#:35708

Part#: 11517838676

Ships in 1-2 days

6% off MSRP $ 118.99

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

$ 111.99 USD

Add to Wish List

Qty

6% off MSRP

$ 118.99

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

$ 111.99 USD

Add to Wish List

This is a genuine BMW replacement water pump pulley that is made out of plastic. These become brittle over time and it is important to replace these every 50-60K miles to prevent a potential failure and overheating.

Show More Show Less

Genuine BMW Thermostat Housing - E90 E92 E93 M3

T#:36175

Part#: 11537838480

Ships in 1-2 days

2% off MSRP $ 248.99

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

$ 243.99 USD

Add to Wish List

Qty

2% off MSRP

$ 248.99

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

$ 243.99 USD

Add to Wish List

Genuine BMW Thermostat Housing -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

Genuine BMW Thermostat - 79*C - S65 S85

T#:348481

Part#: 11537836155

Ships in 1-2 days

15% off MSRP $ 150.84

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

$ 127.99 USD

Add to Wish List

Qty

15% off MSRP

$ 150.84

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

$ 127.99 USD

Add to Wish List

Replacement stock thermostat for E90, E92, E93 M3 - S65 engine- E60 M5 E63 M6 with S85 engine. Your car may still operate fine according to the instrument display but the electrically-operated thermostat may be going bad.

Show More Show Less

Genuine BMW Lower Radiator Hose - E9x M3

T#:14613

Part#: 11537840661

In Stock

8% off MSRP $ 154.99

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

$ 141.99 USD

Add to Wish List

Qty

8% off MSRP

$ 154.99

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

$ 141.99 USD

Add to Wish List

This Genuine BMW cooling hose connects the bottom of the thermostat to the right side of the radiator.

This item fits the following BMWs:
2008-2011 E90 BMW M3 - Sedan
2008-2013 E92 BMW M3 - Coupe
2008-2013 E93 BMW M3 - Convertible

Show More Show Less

Additional Water Pump - E90, E92, E93, Z4

T#:24649

Part#: 64118369806

In Stock

6% off MSRP $ 297.99

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

$ 279.99 USD

Add to Wish List

Qty

6% off MSRP

$ 297.99

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

$ 279.99 USD

Add to Wish List

Genuine BMW Additional Water Pump
This item fits the following BMW Chassis:
E85 Z4M,E85 Z4,E86 Z4,E90,E92,E93

Genuine BMW Thermostat Replacement Kit - E90 E92 E93 M3 S65

T#:377551

Part#: 11537836155KT

Ships in 1-2 days

$ 176.99 USD

Add to Wish List

Qty

$ 176.99 USD

Add to Wish List

This kit includes all of the Genuine BMW components you need to replace your thermostat.

Genuine BMW Upper Radiator Hose - E9x M3

T#:14612

Part#: 11537838214

Ships in 1-2 days

9% off MSRP $ 125.99

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

$ 114.99 USD

Add to Wish List

Qty

9% off MSRP

$ 125.99

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

$ 114.99 USD

Add to Wish List

This Genuine BMW cooling hose connects the top of the thermostat to the left side of the radiator.

This item fits the following BMWs:
2008-2011 E90 BMW M3 - Sedan
2008-2013 E92 BMW M3 - Coupe
2008-2013 E93 BMW M3 - Convertible

Show More Show Less

Genuine BMW Radiator - E9X M3

T#:14404

Part#: 17112283468

Ships on Nov 24, 2026

8% off MSRP $ 631.99

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

$ 578.99 USD

Add to Wish List

Qty

8% off MSRP

$ 631.99

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

$ 578.99 USD

Add to Wish List

This radiator is the OE BMW replacement for the stock radiator in the E90, E92, and E93 M3. Keeping your M3 at peak performance means including your cooling system in your regular maintenance schedules with the radiator, water pump, and thermostat being the primary components needing replacement.

Show More Show Less

Genuine BMW New Water Pump

T#:35707

Part#: 11517838201

Ships in 1-2 days

8% off MSRP $ 816.99

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

$ 747.99 USD

Add to Wish List

Qty

8% off MSRP

$ 816.99

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

$ 747.99 USD

Add to Wish List

Genuine BMW Coolant Pump, Mechanical
This item fits the following BMW Chassis:
E60 M5,E63 M6,E63,E90,E92,E93

Fits BMW Engines including:
S65,S85

Show More Show Less

Genuine BMW Blower Motor for Control Unit Housing (E-Box Fan) - E82 E...

T#:40950

Part#: 12907547141

Ships in 1-2 days

5% off MSRP $ 238.99

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

$ 227.99 USD

Add to Wish List

Qty

5% off MSRP

$ 238.99

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

$ 227.99 USD

Add to Wish List

Genuine BMW E-Box Fan -
This item fits the following BMW Chassis:
E82,E90,E92,E93

Fits BMW Engines including:
N51,N52,N52N,N54,N55,S65

Genuine BMW Coolant Return Hose - E90 E92 E93 M3

T#:36177

Part#: 11537838775

Ships in 7 Business Days

8% off MSRP $ 153.99

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

$ 140.99 USD

Add to Wish List

Qty

8% off MSRP

$ 153.99

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

$ 140.99 USD

Add to Wish List

Genuine BMW Hose, Heater Return Pipe- -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

Genuine BMW Fan shroud - E90 E92 E93 M3

T#:45834

Part#: 17112283407

Ships in 4 Business Days

5% off MSRP $ 237.99

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

$ 226.99 USD

Add to Wish List

Qty

5% off MSRP

$ 237.99

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

$ 226.99 USD

Add to Wish List

Genuine BMW Fan Shroud -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

Genuine BMW Coolant Hose - S65 4.0L

T#:367935

Part#: 17222283594

In Stock

6% off MSRP $ 109.99

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

$ 102.99 USD

Add to Wish List

Qty

6% off MSRP

$ 109.99

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

$ 102.99 USD

Add to Wish List

Select Vehicle

Purpose

Category

Home

Cooling

Brand

View All Brands

Price

Special Offers

On Sale (2)

Shipping