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
Water Pump And Thermostat Kit - E9X M3
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T#:554059
Part#: 11517838201KT4
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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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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
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
Basic Cooling System Service Kit - E9X M3 S65
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T#:557214
Part#: E9XM3BCKT
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$ 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+)
High Performance Cooling System Upgrade - E9X M3 (04/2008+)
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Packaged by Turner - Corporate Logo
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)
High Performance Cooling System Upgrade - E9X M3 (up to 04/2008) ...
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Packaged by Turner - Corporate Logo
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
Basic Cooling System Service Kit - E9X M3 S65 - Dry
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T#:53891614
Part#: 17112283500KT
Ships in 2 Business Days
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$ 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 (up to 04/2008)
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.
Cooling System Overhaul Kit - E9X M3 (04/2008+)
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.
VTT Billet Coolant Reservoir Cap - Anodized Blue - Most BMWs 2006+ (E/F/G-Chassis)
VTT Billet Coolant Reservoir Cap - Anodized Blue - Most BMWs 2006+ (E...
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Vargas Turbo Technologies - Corporate Logo
T#:7530036
Part#: COOLANTCAPBLUE
In Stock
$ 79.99 USD
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$ 79.99 USD
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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit
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VTT Billet Coolant Reservoir Cap - Anodized Red - Most BMWs 2006+ (E/F/G-Chassis)
VTT Billet Coolant Reservoir Cap - Anodized Red - Most BMWs 2006+ (E/...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:7530034
Part#: COOLANTCAPRED
In Stock
$ 79.99 USD
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$ 79.99 USD
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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit
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VTT Billet Coolant Reservoir Cap - Anodized Clear - Most BMWs 2006+ (E/F/G-Chassis)
VTT Billet Coolant Reservoir Cap - Anodized Clear - Most BMWs 2006+ (...
This coolant cap retains ALL of the factory provisions by simply allowing you to snap t...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:7530035
Part#: COOLANTCAPRAW
Ships in 3 Business Days
$ 78.99 USD
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$ 78.99 USD
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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit
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VTT Billet Coolant Reservoir Cap - Anodized Black - Most BMWs 2006+ (E/F/G-Chassis)
VTT Billet Coolant Reservoir Cap - Anodized Black - Most BMWs 2006+ (...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:7530033
Part#: COOLANTCAPBLK
Back Ordered
$ 79.99 USD
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$ 79.99 USD
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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit
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Vargas Upper Radiator Hose - Black - BMW E9X M3
Vargas Upper Radiator Hose - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164959
Part#: S65COUPRABLK
Ships in 10 Business Days
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$ 179.99 USD
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$ 179.99 USD
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The VTT Billet/Silicone Upper Radiator Hose is the only solution on the market that addresses both the hose material and the connector integrity simultaneously.
Vargas Upper Vent Hose - Black - BMW E9X M3
Vargas Upper Vent Hose - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164960
Part#: S65COUVHBLK
Ships in 10 Business Days
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$ 74.99 USD
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$ 74.99 USD
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This VTT kit provides a permanent fix by utilizing heavy-duty silicone and anodized billet aluminum ends.
Vargas Heater Return Pipe Hose Upgrade - Black - BMW E9X M3
Vargas Heater Return Pipe Hose Upgrade - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164954
Part#: S65COOLHEATBLK
Ships in 10 Business Days
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$ 127.99 USD
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$ 127.99 USD
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Upgrade your BMW M3’s engine bay while simultaneously reinforcing your cooling system with the VTT Billet/Silicone Heater Return Pipe Hose.
Vargas Water Pump Vent Hose - Black - BMW E9X M3
Vargas Water Pump Vent Hose - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164956
Part#: S65COPUBLK
Ships in 10 Business Days
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$ 104.99 USD
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$ 104.99 USD
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Prevent a roadside breakdown with the VTT Billet/Silicone S65 Water Pump Vent Hose, the ultimate maintenance upgrade for your BMW E9X M3.
Vargas Radiator Hose Kit - Black - BMW E9X M3
Vargas Radiator Hose Kit - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164958
Part#: S65RHKBLK
Ships in 10 Business Days
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$ 314.99 USD
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$ 314.99 USD
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The VTT S65 Radiator Hose Kit is the premier cooling system upgrade for the BMW E9X M3.
Vargas Lower Radiator Hose - Black - BMW E9X M3
Vargas Lower Radiator Hose - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164955
Part#: S65COLLOWBLK
Ships in 10 Business Days
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$ 179.99 USD
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$ 179.99 USD
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Designed for the S65 V8 engine, the VTT Lower Radiator Hose upgrade addresses the common maintenance headaches associated with aging BMW cooling systems.
Vargas Coolant Hose Upgrade Kit - Black - BMW E9X M3
Vargas Coolant Hose Upgrade Kit - Black - BMW E9X M3
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Vargas Turbo Technologies - Corporate Logo
T#:52164951
Part#: S65COOLFULLBLK
Ships in 10 Business Days
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$ 524.99 USD
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$ 524.99 USD
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Upgrade your BMW E9X M3’s engine bay and cooling reliability simultaneously with the Vargas Turbo Technologies S65 Billet/Silicone Full Hose Kit.

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