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

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 Auxiliary Radiator Hose - 17128654820

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

T#:620734

Part#: 17128654820

Ships in 3 Business Days

6% off MSRP $ 94.99

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

$ 88.99 USD

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6% off MSRP

$ 94.99

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

$ 88.99 USD

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This item fits the following BMWs:

M340i G20 M340iX G20

HOSE - JUNCTION-HEAT

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

T#:546143

Part#: 11538606278

In Stock

5% off MSRP $ 84.99

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

$ 80.99 USD

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5% off MSRP

$ 84.99

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

$ 80.99 USD

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Hose coming off the small fitting on the thermostat. Replacement coolant hose for damaged or worn items. Dont forget to change all associated parts when doing a cooling service, or to fix a leak.

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...

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

T#:618175

Part#: 17128654823

In Stock

Sale - Save 5% $ 131.99

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

$ 125.03 USD

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Sale - Save 5%

$ 131.99

This product was last offered at the strikethrough price on
06-25-2026

$ 125.03 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 Engine Oil Cooler - BMW B58 & B58TU 3.0L (B58A & B58D) ...

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

T#:541339

Part#: 11428583901

Ships in 3 Business 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.

$ 250.99 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.

$ 250.99 USD

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Engine oil coolers help reduce the oil temperature, preventing the oil from breaking down prematurely and losing its lubricating properties. Engine oil coolers play a crucial role in regulating oil temperature, ensuring proper lubrication, and optimizing engine performance and longevity. Engine oil that is too hot drops in viscosity and does not provide adequate lubrication to sensitive engine components such as bearings, which can fail catastrophically if not properly lubricated. If your engine oil cooler has been damaged or has failed we recommend replacing it to ensure no damage occurs to your engine.

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Genuine BMW Turbo Water Pump - BMW S55 B46 B48

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

T#:613575

Part#: 64116834917

Ships in 3 Business Days

6% off MSRP $ 296.99

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

$ 278.99 USD

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6% off MSRP

$ 296.99

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

$ 278.99 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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Genuine BMW Coolant Expansion Tank - High Temp Circuit - BMW G42 G20 ...

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

T#:613870

Part#: 17138610652

Ships in 3 Business Days

6% off MSRP $ 198.99

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

$ 187.99 USD

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6% off MSRP

$ 198.99

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

$ 187.99 USD

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If your coolant reservoir tank has cracked or if one of the mounting points has broken, this is the perfect replacement to ensure your coolant system remains leak-free. This reservoir specifically works with the high-temp circuit, which is responsible for cooling your engine block and cylinder head.

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Radiator Return Pipe - B58

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

T#:545300

Part#: 11538630023

Ships in 3 Business Days

6% off MSRP $ 329.99

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

$ 309.99 USD

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6% off MSRP

$ 329.99

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

$ 309.99 USD

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Coolant pipe that runs from the thermostat next to the engine block. Make sure your cooling system is working properly and leak free. When your in the tight spaces doing a service it makes sense to change all associated parts.

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

Sub-Categories

Genuine BMW Auxiliary Radiator Hose - 17128654820

HOSE - JUNCTION-HEAT

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

Genuine BMW Engine Oil Cooler - BMW B58 & B58TU 3.0L (B58A & B58D) ...

Genuine BMW Turbo Water Pump - BMW S55 B46 B48

Genuine BMW Coolant Expansion Tank - High Temp Circuit - BMW G42 G20 ...

Radiator Return Pipe - B58

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