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BMW Cooling System Parts & Accessories for BMW X Series G06 X6 (2020+)

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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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Race German Coolant Temperature Sender Adapter - 1/8NPT

T#:6827888

Part#: RGCTSA1/8NPT

In Stock

$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

Limited Qty Sale

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Qty

$ 35.99

This product was last offered at the strikethrough price on
10-07-2026

$ 31.99 USD

Limited Qty Sale

Add to Wish List

Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Race German Coolant Temperature Sender Adapter - M12x1.5

T#:6827887

Part#: RGCTSAM12

In Stock

$ 35.99 USD

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Qty

$ 35.99 USD

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Rein N63 Coolant Hose - 17127575427 - F07, F10 G30 5 Series, F06 F12 ...

2X Entries Into Our F80 M3 Sweepstakes

T#:554681

Part#: 17127575427

In Stock at Vendor

$ 52.79 USD

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$ 52.79 USD

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L

Rein Vent Hose - 17127576363 - F07, F10 G30 5 Series, F06 F12 F13 6 S...

2X Entries Into Our F80 M3 Sweepstakes

T#:554680

Part#: 17127576363

Ships in 2 Business Days

$ 26.99 USD

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$ 26.99 USD

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L

Rein B58 Coolant Return Line - 11538650087 - G20, G22, G23, G26, G42,...

2X Entries Into Our F80 M3 Sweepstakes

T#:53856300

Part#: 11538650087

In Stock

$ 60.99 USD

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$ 60.99 USD

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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.

Rein N63 Intercooler Expansion Tank - 17137647281 - F07, F10 G30 5 Se...

2X Entries Into Our F80 M3 Sweepstakes

T#:584477

Part#: 17137647281

In Stock at Vendor

$ 71.99

This product was last offered at the strikethrough price on
10-22-2026

$ 68.95 USD

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$ 68.95 USD

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Rein Expansion Tank Cap

2X Entries Into Our F80 M3 Sweepstakes

T#:384807

Part#: 17117639021

Ships in 4 Business Days

$ 16.99 USD

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$ 16.99 USD

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Cap for plastic expansion tank

Engine Coolant Expansion Tank Cap

2X Entries Into Our F80 M3 Sweepstakes

T#:59038367

Part#: 17135A1BD89

Ships in 4 Business Days

$ 9.99 USD

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Qty

$ 9.99 USD

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Rein Coolant Expansion Tank - 171386106612 - G01, F97, G02, F98, G05,...

2X Entries Into Our F80 M3 Sweepstakes

T#:55965843

Part#: 171386106612

Ships in 4 Business Days

$ 49.99 USD

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$ 49.99 USD

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Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.

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Rein N63 Turbocharger Coolant Supply Line - 11539896890 - G30 5 Serie...

2X Entries Into Our F80 M3 Sweepstakes

T#:4826914

Part#: 11539896890

Ships in 4 Business Days

$ 54.99 USD

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Qty

$ 54.99 USD

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Rein B58 B58C B58D Turbocharger Coolant Supply Line - 11538650086 - G...

2X Entries Into Our F80 M3 Sweepstakes

T#:58307569

Part#: 11538650086

Ships in 4 Business Days

$ 72.00 USD

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$ 72.00 USD

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Supplies coolant to the turbocharger

Rein Expansion Tank Kit - 17138610661 - G01, F97, G02, F98, G05, G06,...

2X Entries Into Our F80 M3 Sweepstakes

T#:55965839

Part#: 17138610661

Ships in 4 Business Days

$ 56.99 USD

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Qty

$ 56.99 USD

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Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.

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