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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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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Do88 - BigPack BMW M3 E90/E92 DKG DCT
For BMW M3 E90 and E92 models with DKG/DCT transmission
DO88 - Corporate Logo
T#:34885395
Part#: BIG-M3-DCT
In Stock
$ 3,041.99

This product was last offered at the strikethrough price on
10-03-2026

$ 2,799.99 USD
Free Shipping
$ 2,799.99 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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DO88 - Corporate Logo
T#:13891856
Part#: OC100
In Stock at Vendor
$ 782.99 USD
Free Shipping
$ 782.99 USD
Free Shipping
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 - Corporate Logo
T#:13891817
Part#: WC190
In Stock at Vendor
$ 712.00 USD
Free Shipping
$ 712.00 USD
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The team at DO88 has vigorously tested this radiator to deliver peak performance with the peace of mind of quality for your N55 engine. They guarantee reliability and endurance in all situations to let your car breathe better than before! Boasting a 14% increase in core volume and 8% lower coolant temps, this upgrade is a no-brainer for petrol heads like us. Keeping core temperatures low eliminates the risk of heat soak leading to overheating giving you max performance at any given moment. no compromise has been made at DO88 leaving you with one of the best radiator options on the market!
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Vargas Turbo Technologies - Corporate Logo
T#:7530034
Part#: COOLANTCAPRED
In Stock
$ 79.99 USD
Free Shipping
$ 79.99 USD
Free Shipping
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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Genuine BMW - Corporate Logo
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
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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
Free Shipping
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.
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Redline - Corporate Logo
T#:640437
Part#: 81205
In Stock
$ 68.99 USD
Free Shipping
$ 68.99 USD
Free Shipping
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.
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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
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
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Genuine BMW - Corporate Logo
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
Free Shipping
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
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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.
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Genuine BMW - Corporate Logo
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
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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
Free Shipping


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

Fits BMW Engines including:
S65

Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
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.
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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
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
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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping


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

Genuine BMW - Corporate Logo
T#:377551
Part#: 11537836155KT
Ships in 1-2 days
$ 176.99 USD
Free Shipping
$ 176.99 USD
Free Shipping
This kit includes all of the Genuine BMW components you need to replace your thermostat.
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...
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:7530035
Part#: COOLANTCAPRAW
Ships in 4 Business Days
$ 78.99 USD
Free Shipping
$ 78.99 USD
Free Shipping
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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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
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
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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
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.
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DO88 - Corporate Logo
T#:13891852
Part#: OC120
In Stock at Vendor
$ 646.99 USD
Free Shipping
$ 646.99 USD
Free Shipping
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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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping


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

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Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping


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 - Corporate Logo
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
Free Shipping
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
Free Shipping


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

Fits BMW Engines including:
S65


Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping


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

Fits BMW Engines including:
S65

Genuine BMW - Corporate Logo
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
Free Shipping
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
Free Shipping
DO88 - Corporate Logo
T#:13891855
Part#: OC110
In Stock at Vendor
$ 1,299.99 USD
Free Shipping
$ 1,299.99 USD
Free Shipping
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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Genuine BMW Motorsport - Corporate Logo
T#:5574
Part#: 11518331044
Special Order: No Guaranteed ETA
$ 999.99 USD
Free Shipping
$ 999.99 USD
Free Shipping
Upgrade from the plastic impeller on the stock water pump to this aluminum impeller pump originally developed by BMW for the M3 GT4. This aluminum water pump was designed to stand up to the abuse of racing but can be used on a standard street car.
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Vargas Turbo Technologies - Corporate Logo
T#:7530033
Part#: COOLANTCAPBLK
In Stock
$ 79.99 USD
Free Shipping
$ 79.99 USD
Free Shipping
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 Turbo Technologies - Corporate Logo
T#:52164954
Part#: S65COOLHEATBLK
Ships on Oct 23, 2026
New Item
$ 127.99 USD
Free Shipping
$ 127.99 USD
Free Shipping
Upgrade your BMW M3’s engine bay while simultaneously reinforcing your cooling system with the VTT Billet/Silicone Heater Return Pipe Hose.

Vargas Radiator Hose Kit - Black - BMW E9X M3
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164958
Part#: S65RHKBLK
Back Ordered
New Item
$ 314.99 USD
Free Shipping
$ 314.99 USD
Free Shipping
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
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164955
Part#: S65COLLOWBLK
Ships on Oct 23, 2026
New Item
$ 179.99 USD
Free Shipping
$ 179.99 USD
Free Shipping
Designed for the S65 V8 engine, the VTT Lower Radiator Hose upgrade addresses the common maintenance headaches associated with aging BMW cooling systems.
Vargas Upper Vent Hose - Black - BMW E9X M3
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164960
Part#: S65COUVHBLK
Ships on Oct 23, 2026
New Item
$ 74.99 USD
Free Shipping
$ 74.99 USD
Free Shipping
This VTT kit provides a permanent fix by utilizing heavy-duty silicone and anodized billet aluminum ends.

Vargas Water Pump Vent Hose - Black - BMW E9X M3
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164956
Part#: S65COPUBLK
Ships on Oct 23, 2026
New Item
$ 104.99 USD
Free Shipping
$ 104.99 USD
Free Shipping
Prevent a roadside breakdown with the VTT Billet/Silicone S65 Water Pump Vent Hose, the ultimate maintenance upgrade for your BMW E9X M3.
Vargas Coolant Hose Upgrade Kit - Black - BMW E9X M3
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164951
Part#: S65COOLFULLBLK
Ships on Oct 23, 2026
New Item
$ 524.99 USD
Free Shipping
$ 524.99 USD
Free Shipping
Upgrade your BMW E9X M3’s engine bay and cooling reliability simultaneously with the Vargas Turbo Technologies S65 Billet/Silicone Full Hose Kit.

Vargas Upper Radiator Hose - Black - BMW E9X M3
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:52164959
Part#: S65COUPRABLK
Ships on Oct 23, 2026
New Item
$ 179.99 USD
Free Shipping
$ 179.99 USD
Free Shipping
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.