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Genuine BMW BMW Cooling System Parts & Accessories for BMW 3 Series G20 (2019+)

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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 Electronic Thermostat and Coolant Distribution Module - B...

T#:617366

Part#: 11538642559

Ships in 3 Business Days

Sale - Save 10% $ 449.99

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

$ 402.99 USD

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$ 449.99

This product was last offered at the strikethrough price on
08-19-2026

$ 402.99 USD

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Genuine BMW electronic thermostat that is controlled by the car's computer for optimal control over the engine and coolant's temperature.

Genuine BMW Expansion Tank Coolant Hose - BMW G42 G20 G22/23/26 B46/B...

For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later...

T#:624478

Part#: 17128654824

Ships in 3 Business Days

Sale - Save 9% $ 54.99

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

$ 49.98 USD

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$ 54.99

This product was last offered at the strikethrough price on
08-26-2026

$ 49.98 USD

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This coolant hose connects your cylinder head to your expansion tank. Replace your cracked or split coolant expansion tank hose to prevent coolant and pressure loss in your cooling system.

Genuine BMW Lower Radiator Hose - BMW G42 G20 G22/23/26 B46/B48 ...

For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later...

T#:618175

Part#: 17128654823

In Stock

Sale - Save 8% $ 132.99

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

$ 122.71 USD

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$ 132.99

This product was last offered at the strikethrough price on
08-26-2026

$ 122.71 USD

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The lower radiator hose transfers low temp coolant from your radiator to your engine, helping to keep engine temperatures in check. If your lower radiator hose failed, replace it with this Genuine BMW hose to prevent additional coolant loss, overheating, and stop air from entering your coolant system.

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Genuine BMW Cooant Pump with Support Housing - BMW G42 G2X G30 G01 G0...

For models with the earlier B48D, B46D, or B46X engines and without the Energy Recovery...

T#:606625

Part#: 11518650988

In Stock

Sale - Save 8% $ 274.99

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

$ 254.32 USD

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$ 274.99

This product was last offered at the strikethrough price on
08-26-2026

$ 254.32 USD

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Mechanical water pumps circulate coolant between the engine block, cylinder head, and radiators. Over time, the seals and bearings can wear out, leading to leaks from the impeller shaft and around the pump face. Some BMW water pumps have even had imellers that come loose from the shaft, resulting in little or no coolant flow. Plastic coolant flanges attached to the housing can become brittle over time, cracking or breaking off completely, leading to coolant loss and overheating. Restore cooling functionality and performance with a brand new pump directly from BMW. This coolant pump assembly includes the pump, the coolant support housing, four of the plastic coolant flanges, and a new water pump pulley.

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PROFILE-GASKET

T#:528940

Part#: 11518632587

Ships in 3 Business Days

Sale - Save 10% $ 33.99

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

$ 30.66 USD

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$ 33.99

This product was last offered at the strikethrough price on
08-26-2026

$ 30.66 USD

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This gasket needs to be replaced when splitting apart your pulley housing from the water pump. Gasket that goes between the coolant pump and the coolant pump front pulley assembly.

Genuine BMW Coolant Hose - Waterp Pump to Thermostat Module - BMW G42...

For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later...

T#:618269

Part#: 11538650981

In Stock

Sale - Save 8% $ 100.99

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

$ 92.79 USD

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$ 100.99

This product was last offered at the strikethrough price on
08-26-2026

$ 92.79 USD

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Over time, rubber hoses and plastic coolant flanges can become brittle due to numerous heat cycles. This often leads to cracks and coolant leaks on the left side of the engine. Additionally, the two o-rings that seal this hose to the water pump flange and the thermostat module housing can flatten, leading to leaks when reinstalled. When servicing your cooling system, it is advised to replace this hose to prevent leaks and potential overheating. This is especially helpful due to its cramped location, requiring the intake manifold to be removed for replacement.

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Cap

D=6

T#:191368

Part#: 17128515062

In Stock

Sale - Save 8% $ 8.91

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

$ 8.24 USD

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$ 8.91

This product was last offered at the strikethrough price on
08-26-2026

$ 8.24 USD

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Genuine BMW Cap -
This item fits the following BMW Chassis:
F15,F25 X3

Fits BMW Engines including:
N57N

Genuine BMW Turbo Water Pump - BMW S55 B46 B48

T#:613575

Part#: 64116834917

In Stock

Sale - Save 8% $ 278.99

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

$ 257.29 USD

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$ 278.99

This product was last offered at the strikethrough price on
08-26-2026

$ 257.29 USD

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eplace your faulty or failing electric water pump with this Genuine BMW pump for guaranteed reliability. This water pump feeds coolant to the turbo, keeping temperatures optimal for performance and smooth operation.

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