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BMW Cooling System Parts & Accessories for BMW E93 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

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T#:554059

Part#: 11517838201KT4

Ships in 3 Business Days

Sale - Save 26% $ 285.99

This product was last offered at the strikethrough price on
04-07-2026

$ 210.54 USD

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Sale - Save 26%

$ 285.99

This product was last offered at the strikethrough price on
04-07-2026

$ 210.54 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

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T#:554084

Part#: 11537836155KT2

In Stock at Vendor

Sale - Save 14% $ 99.99

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

$ 85.99 USD

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Sale - Save 14%

$ 99.99

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

$ 85.99 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

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T#:557214

Part#: E9XM3BCKT

Ships in 3 Business Days

$ 632.99

This product was last offered at the strikethrough price on
02-27-2026

$ 557.99 USD

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$ 557.99 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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High Performance Cooling System Upgrade - E9X M3 (04/2008+)

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T#:557320

Part#: E9XM3PCKT

Back Ordered

$ 2,285.18

This product was last offered at the strikethrough price on
07-09-2026

$ 2,257.24 USD

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$ 2,257.24 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) ...

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T#:557321

Part#: E9XM3PCKT2

Back Ordered

$ 2,271.25

This product was last offered at the strikethrough price on
07-09-2026

$ 2,243.31 USD

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$ 2,243.31 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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Basic Cooling System Service Kit - E9X M3 S65 - Dry

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T#:53891614

Part#: 17112283500KT

Ships in 3 Business Days

$ 540.99

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

$ 531.99 USD

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$ 531.99 USD

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

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T#:554725

Part#: E9XM3CSO2KT

Back Ordered

$ 1,785.99

This product was last offered at the strikethrough price on
04-07-2026

$ 1,732.99 USD

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$ 1,732.99 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)

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T#:554104

Part#: 11517839062KT10

Back Ordered

$ 1,761.17

This product was last offered at the strikethrough price on
04-07-2026

$ 1,718.51 USD

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$ 1,718.51 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.

Do88 - BigPack BMW M3 E90/E92 DKG DCT

For BMW M3 E90 and E92 models with DKG/DCT transmission

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T#:34885395

Part#: BIG-M3-DCT

In Stock at Vendor

$ 3,041.99 USD

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$ 3,041.99 USD

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Do88 - BigPack BMW M3 E90/E92 DKG DCT offers a premium solution for BMW enthusiasts seeking optimal cooling performance for their high-performance M3 models. Designed specifically for the BMW M3 E90 and E92 equipped with the DKG/DCT transmission, this complete cooling package by Do88 provides significant improvements in engine and transmission temperatures, ensuring peak performance and reliability under extreme conditions. Ideal for both street and track applications, this package offers unparalleled benefits for any driver looking to enhance their BMW’s performance.

Key Features:

Comprehensive cooling solution designed for BMW M3 E90 and E92 models with DKG/DCT transmission Includes - M3 engine oil cooler, M3 DCT / DKG oil cooler, M3 power steering cooler, M3 radiator Significantly reduces heat levels, allowing for sustained performance in intense driving scenarios Direct-fit design for straightforward installation without extensive modifications Engineered to withstand high-performance demands for both street and track use The Do88 BigPack BMW M3 E90/E92 DKG DCT cooling kit is a top choice for enthusiasts and professional drivers who need reliable and robust performance. Designed with precision and superior materials, this package ensures your BMW M3 remains cool under pressure, making it an essential upgrade for any Turner Motorsport enthusiast aiming to achieve the ultimate driving experience.

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E90/E92 M3 DO88 Race Oil Cooler

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T#:13891856

Part#: OC100

In Stock

$ 782.99 USD

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$ 782.99 USD

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The Beloved S65 V8 from BMW is well known and claimed to be one of the best engines ever introduced by the brand, but just like any other powertrain, it comes with its own set of issues. One of these issues is cooling issues. The team at DO88 took this opportunity to create and engineer a newly upgraded oil cooler to eliminate all of the previous issues. Boasting a 65% increase in core volume, a 59% larger active cooling area, and a 13.9% higher oil volume, this cooler definitely outperforms its OE counterpart. Nonetheless, this oil cooler is the perfect upgrade to your E9X M3!

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DO88 Race Power Steering Oil Cooler - E90/E92

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T#:13891852

Part#: OC120

In Stock at Vendor

$ 646.99 USD

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$ 646.99 USD

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Boasting a 261% increase in core volume, a 100% increase in active cooling area, and a 100% larger oil volume, this power steering oil cooler is an absolute no-brainer. The second one installs wider wheels or stickier tires, the steering servo motor will start getting a run for its money, leaving the opportunity for heat soak. With our of development and rigorous testing, this oil cooler suits track use just as much as street use and is the perfect upgrade for your vehicle!

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DO88 DCT Racing Oil Cooler For E90/E92 M3

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T#:13891855

Part#: OC110

Ships on Jul 29, 2026

$ 1,299.99 USD

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$ 1,299.99 USD

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With a 217% bigger core volume, 178% bigger cooling area, and a 110% higher oil volume, this oil cooler compensates on no fronts. Built for the track but just as capable on the road, DO88's upgraded oil cooler for the E90/E92 M3 gives you maximum performance and compromises nowhere.

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