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BMW Cooling System Parts & Accessories for BMW I12 i8 B38 1.5L

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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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Genuine BMW Engine Coolant Expansion Tank Cap - 17135A1BD89

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T#:29699315

Part#: 17135A1BD89

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6% off MSRP $ 34.99

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$ 32.99 USD

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6% off MSRP

$ 34.99

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

$ 32.99 USD

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Genuine BMW Cover Lid
This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5,E71 X6,F01,F02,F06,F10,F12,F13,F15,F16,F30,F80 M3,F82 M4,F83,i3i12

Genuine BMW Fan Relay

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T#:144381

Part#: 61369198302

In Stock

2% off MSRP $ 49.99

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$ 48.99 USD

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2% off MSRP

$ 49.99

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

$ 48.99 USD

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Genuine BMW Relay - 130A
This item fits the following BMW Chassis:
F01,F02,F06,F10,F12,F13,F15,F16,F22,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83,I12 i8

Silver Auxiliary Coolant Reservoir Cap

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T#:38128032

Part#: 201-0394-SIL

Ships in 7 Business Days

$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD

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$ 94.99 USD

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BMW Silver Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
Premium billet aluminum construction – Offers enhanced durability and longevity
Direct replacement design – Secure fit without adhesives or modifications
Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Silver Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

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Genuine BMW Coolant Auxillary Electric Water Pump - F80/82/83 S55, F3...

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T#:212739

Part#: 11518600442

In Stock

11% off MSRP $ 343.99

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

$ 308.99 USD

Limited Qty Sale

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11% off MSRP

$ 343.99

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

$ 308.99 USD

Limited Qty Sale

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Genuine BMW Genuine BMW Coolant Pump, Electric - 11518600442
This item fits the following BMW Chassis:
F80,F82,F83,

Fits BMW Engines including:
S55,

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Genuine BMW Radiator - F80 M3,F82 M4,F83,i8

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T#:201027

Part#: 17112284608

Ships in 2 Business Days

8% off MSRP $ 526.99

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

$ 482.99 USD

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8% off MSRP

$ 526.99

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

$ 482.99 USD

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Genuine BMW Radiator -
This item fits the following BMW Chassis:
F80 M3,F82 M4,F83,I12 i8

Fits BMW Engines including:
S55

Genuine BMW Upper mount for Radiator

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T#:46035

Part#: 17117600543

Ships in 2 Business Days

6% off MSRP $ 34.99

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

$ 33.00 USD

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6% off MSRP

$ 34.99

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

$ 33.00 USD

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Genuine BMW Upper Sealing -
This item fits the following BMW Chassis:
F22,F30,F31,F32,F33,F34,F36,I01 i3,I12 i8

Fits BMW Engines including:
N20,N26,N55

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Genuine BMW Bracket For Module - Left

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T#:207074

Part#: 17118620732

Ships in 2 Business Days

4% off MSRP $ 46.99

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

$ 44.99 USD

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4% off MSRP

$ 46.99

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

$ 44.99 USD

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Genuine BMW Bracket For Module, Left -
This item fits the following BMW Chassis:
F22,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83,I01 i3,I12 i8

Fits BMW Engines including:
N20,N26,N55,S55

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Genuine BMW Hose Clamp 07129952104

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T#:6533

Part#: 07129952104

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$ 3.99 USD

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$ 3.99 USD

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GENUINE BMW HOSE CLAMP 07129952104

BMW Expanding Rivet

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T#:7436

Part#: 17111712963

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$ 1.99 USD

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$ 1.99 USD

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The most common use for this rivet is to secure the radiator fan shroud to the radiator. This rivet can also be used on a wide variety of other applications as well.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

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Support Rubber Mounting - E70, E71, F15, F16, F85, F86, I01, I12 ...

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T#:45935

Part#: 17117553481

Ships in 2 Business Days

3% off MSRP $ 29.99

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

$ 28.99 USD

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3% off MSRP

$ 29.99

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$ 28.99 USD

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Genuine BMW Support Rubber Mounting
This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5 X5,E71 X6,F15,F16,i3i12

Suction Pipe - I12

Compressor - Refrigerant Line Iwt

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T#:223988

Part#: 64509353264

Ships in 2 Business Days

5% off MSRP $ 306.99

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

$ 292.99 USD

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5% off MSRP

$ 306.99

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

$ 292.99 USD

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Genuine Bmw Suction Pipe - 64509353264

Sealing Lower - I12

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T#:194506

Part#: 17117649147

Ships in 5 Business Days

4% off MSRP $ 69.99

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

$ 66.99 USD

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4% off MSRP

$ 69.99

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$ 66.99 USD

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Genuine Bmw Sealing Lower

BMW Black Auxiliary Coolant Reservoir Cap

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T#:38128031

Part#: 201-0394-BLK

Ships in 9 Business Days

$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD

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Qty

$ 94.99 USD

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BMW Black Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
Premium billet aluminum construction – Offers enhanced durability and longevity
Direct replacement design – Secure fit without adhesives or modifications
Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Black Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

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BMW Blue Auxiliary Coolant Reservoir Cap

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:38128029

Part#: 201-0394-BLU

Ships in 9 Business Days

$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD

Add to Wish List

Qty

$ 94.99 USD

Add to Wish List

BMW Blue Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
Premium billet aluminum construction – Offers enhanced durability and longevity
Direct replacement design – Secure fit without adhesives or modifications
Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Blue Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

Show More Show Less

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