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

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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.

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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

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$ 222.99

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

$ 202.73 USD

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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.

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Thermostat Replacement Kit - E9X M3

10X Entries Into Our F80 M3 Sweepstakes

T#:554084

Part#: 11537836155KT2

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Sale - Save 14% $ 99.99

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

$ 86.04 USD

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Sale - Save 14%

$ 99.99

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

$ 86.04 USD

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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 Business Day

$ 567.99

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

$ 552.99 USD

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$ 552.99 USD

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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.

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Basic Cooling System Service Kit - E9X M3 S65 - Dry

10X Entries Into Our F80 M3 Sweepstakes

T#:53891614

Part#: 17112283500KT

Ships in 1 Business Day

$ 540.99

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

$ 524.99 USD

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$ 524.99 USD

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

10X Entries Into Our F80 M3 Sweepstakes

T#:557320

Part#: E9XM3PCKT

Ships in 1 day

$ 2,336.08

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

$ 2,332.08 USD

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$ 2,332.08 USD

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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!

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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 day

$ 2,322.15

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

$ 2,318.15 USD

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$ 2,318.15 USD

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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!

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Water Pump And Thermostat Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15744014

Part#: 82142209769-KT

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

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Qty

Sale - Save 9%

$ 222.99

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

$ 202.73 USD

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The water pumps in these BMW models 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. Kit includes: Mahle-Behr thermostat Geba water pump Vaico coolant Mounting hardware required for the water pump O-rings for the thermostat housing

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Cooling System Overhaul Kit - E9X M3 (04/2008+)

10X Entries Into Our F80 M3 Sweepstakes

T#:554725

Part#: E9XM3CSO2KT

Ships in 1 Business Day

$ 1,811.99

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

$ 1,807.99 USD

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$ 1,807.99 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package.

Cooling System overhaul Kit - E9X M3 (up to 04/2008)

10X Entries Into Our F80 M3 Sweepstakes

T#:554104

Part#: 11517839062KT10

Ships in 1 Business Day

$ 1,797.35

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

$ 1,793.35 USD

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$ 1,793.35 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package.

Coolant Vacuum Purge & Refill Tool Set

10X Entries Into Our F80 M3 Sweepstakes

T#:402498

Part#: 024948SCH01A

In Stock

Sale - Save 22% $ 115.99

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

$ 89.99 USD

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Sale - Save 22%

$ 115.99

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

$ 89.99 USD

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The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.

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Schwaben Coolant Refill/Air Purge Tool

10X Entries Into Our F80 M3 Sweepstakes

T#:362940

Part#: 003466SCH01

In Stock

Sale - Save 20% $ 112.99

This product was last offered at the strikethrough price on
09-29-2026

$ 90.39 USD

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Sale - Save 20%

$ 112.99

This product was last offered at the strikethrough price on
09-29-2026

$ 90.39 USD

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When it comes to BMW's we all know the weak point is commonly in the cooling system, many models proving hard to bleed the air pockets out after the refresh. The coolant refill tool solves this problem, ensuring that you get an air pocket free fill. The entire task is as simple as draining the system like normal, reinstalling the drain plugs and hooking the tool up to your refill location. The reason this tool works so well is due to the venturi valve, it converts air pressure from the compressor to vacuum inside the cooling system, then with a twist of a valve sucks coolant right into the system using the vacuum pressure.

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Schwaben Locking Hose Clamp Pliers

10X Entries Into Our F80 M3 Sweepstakes

T#:377131

Part#: 004170SCH01A

Ships on Oct 28, 2026

$ 63.99

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

$ 57.99 USD

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$ 57.99 USD

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These pliers feature a spring loaded clamp with a 24" cable and will lock onto the clamp and hold open for easy removal. These pliers are designed to remove metal or plastic self-tightening hose clamps with diameters from 11/16" to 2-1/2" ( 18 to 54mm).

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Radiator Pressure Tester Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:391482

Part#: 014710SCH01A

In Stock

Sale - Save 25% $ 205.99

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

$ 154.49 USD

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Sale - Save 25%

$ 205.99

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

$ 154.49 USD

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Are you refreshing your coolant system or having issues with coolant loss? An easy way to test your system for leaks and ensure you're able to maintain pressure without coolant loss is the Schwaben Cooling System Pressure Tester Kit.

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Schwaben Locking Hose Pinch-Off Pliers

10X Entries Into Our F80 M3 Sweepstakes

T#:379950

Part#: 009787SCH01A

In Stock

Sale - Save 15% $ 39.99

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

$ 33.99 USD

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05-02-2026

$ 33.99 USD

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Schwaben Locking Hose Pinch-Off Pliers have adequate clamping force to effectively seal large or pressurized cooling system hoses. These pliers are ideal for clamping shut most hoses, ensuring reliability in your automotive tasks. With swivel jaws, they provide even clamping force, making them a versatile tool for various applications.

Adequate clamping force for large or pressurized hoses
Ideal for clamping shut most hoses
Swivel jaws ensure even clamping force
Versatile tool for automotive maintenance

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. For more information, visit http://www.p65warnings.ca.gov.

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Schwaben Radiator/ Intercooler Fin Comb

10X Entries Into Our F80 M3 Sweepstakes

T#:384260

Part#: 015326SCH01A

In Stock

Sale - Save 29% $ 20.99

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

$ 14.99 USD

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Sale - Save 29%

$ 20.99

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

$ 14.99 USD

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Straighten bent fins in heat exchangers like radiators, condensers, and intercoolers obstruct air flow and reduce heat transfer. Paper-thin fins are easily bent, even by slight pressure.

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