BMW Cooling System Parts & Accessories for MINI

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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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OEM Rein Aluminum Coolant Flange Connector - BMW & MINI B36 B46/B48 G...
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Rein - Corporate Logo
T#:33679696
Part#: 11118511205
In Stock
$ 50.99 USD
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$ 50.99 USD
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Plastic coolant flanges become brittle over time, which can cause them to crack and fail. Prevent overheating and coolant loss with this OEM Rein upgraded aluminum coolant flange.
Bav Auto Tools - Corporate Logo
T#:580395
Part#: B8800082
In Stock
Sale - Save 15% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 28.04 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 28.04 USD
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Multiple adapters include to fit a variety of vehicles.
Bav Auto Tools - Corporate Logo
T#:580397
Part#: B8800084
In Stock
Sale - Save 15% $ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD
Free Shipping
Sale - Save 15%
$ 146.99

This product was last offered at the strikethrough price on
05-03-2026

$ 124.94 USD
Free Shipping

Rein - Coolant Pipe R52 / R53
For vehicles with manual transmissions
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Rein - Corporate Logo
T#:22295082
Part#: 17127518503
Ships in 1-2 days
$ 78.99 USD
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$ 78.99 USD
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Double tube comes mounted together.

For manual transmissions.


Coolant Hose - Supply N14 N18 1.6L Engine
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Rein - Corporate Logo
T#:591872
Part#: 11537565433
In Stock
$ 47.99

This product was last offered at the strikethrough price on
02-26-2026

$ 30.99 USD
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$ 30.99 USD
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Coolant Line for MINI Turbo

Ensure optimal cooling for your MINI's turbo with this essential coolant line, connecting from the auxiliary water pump. Designed to cool the turbo effectively, this critical component features a metal loop hole end for a secure connection to the hollow bolt. Replace your coolant line to maintain proper turbo function and prevent overheating issues.

Benefits:

  • Ensures proper cooling for the turbo
  • Critical component for turbo performance
  • Metal loop hole end for secure connection
  • Prevents overheating issues
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Water Hose
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Rein - Corporate Logo
T#:591871
Part#: 11537565432
In Stock
$ 28.99 USD
Free Shipping on orders $49 and up

Bav Auto Tools - Corporate Logo
T#:580379
Part#: B8800058
In Stock
Sale - Save 25% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 24.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 24.74 USD
Free Shipping on orders $49 and up
Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.
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Coolant Expansion Tank
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Rein - Corporate Logo
T#:388723
Part#: 17137823626
In Stock
$ 78.99 USD
Free Shipping
$ 78.99 USD
Free Shipping
Mounts towards the front of the engine bay

Water Pipe
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Rein - Corporate Logo
T#:599051
Part#: 11537589713
In Stock
$ 27.99 USD
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Thermostat Housing - Aluminum
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URO Premium - Corporate Logo
T#:587660
Part#: 11537512733-PRM
Ships in 2 Business Days
$ 30.99 USD
Free Shipping on orders $49 and up
Metal version of the plastic thermostat housing
Thermostat Housing W/ Thermostat Kit
For vehicles with production from 4/2013
Mahle - Corporate Logo
T#:567822
Part#: 11538674895
Ships in 2 Business Days
$ 180.74 USD
Free Shipping
$ 180.74 USD
Free Shipping
Thermostat Housing W/ Thermostat Kit
For vehicles with production from 4/2013
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Rein - Corporate Logo
T#:599063
Part#: 11538674895
In Stock
$ 109.99 USD
Free Shipping
$ 109.99 USD
Free Shipping


OEM Rein Turbocharger Coolant Supply Line - BMW Gen2 B46/B48 2.0L ...
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Rein - Corporate Logo
T#:34315143
Part#: 11538629971
Ships in 4 Business Days
$ 47.99

This product was last offered at the strikethrough price on
04-28-2026

$ 42.99 USD
Free Shipping on orders $49 and up
$ 42.99 USD
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Turbo coolant supply lines feed coolant to the turbocharger, ensuring temperatures are kept in check. If your coolant line is leaking, it is important to replace it as soon as possible to prevent coolant loss, overheating, and turbo damage.
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Lower Radiator Hose To Thermostat Housing - Front
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Rein - Corporate Logo
T#:599049
Part#: 17122754223
Ships in 3 Business Days
$ 87.99 USD
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$ 87.99 USD
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Mahle-Behr - Corporate Logo
T#:592125
Part#: 17112751276
Ships in 1-2 days
9% off MSRP $ 306.68

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

$ 279.68 USD
Free Shipping
9% off MSRP
$ 306.68

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

$ 279.68 USD
Free Shipping


Mahle-Behr - Corporate Logo
T#:19450
Part#: 17107509071
Ships in 4 Business Days
$ 36.99 USD
Free Shipping on orders $49 and up
This high quality BEHR brand expansion tank is used on MINI Cooper R50 R52, and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own MINIs. If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. 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.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following MINIs:
2002-2006 R50 MINI MINI Cooper
2005-2008 R52 MINI MINI Cooper Convertible.
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Mahle-Behr - Corporate Logo
T#:592124
Part#: 17112751275
Ships on Aug 6, 2026
$ 195.99 USD
Free Shipping
$ 195.99 USD
Free Shipping

Mahle-Behr - Corporate Logo
T#:46488
Part#: 17137823626
Back Ordered
$ 67.99 USD
Free Shipping on orders $49 and up
This high-quality BEHR brand expansion tank is used on MINI Cooper R55 R56 and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own MINIs. If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of fewer than six years before they show signs of fatigue and wear. 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.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following MINIs:
2007+ R56 MINI MINI Cooper, MINI Cooper S
2007+ R55 MINI MINI Cooper Clubman, MINI Cooper S Clubman
2007+ R57 MINI MINI Cooper Convertible, MINI Cooper S Convertible,
2011+ R60 MINI MINI Cooper Countryman, MINI Cooper Countryman S


This item fits the following BMWs:
2015+ I01 BMW i3
2015+ I12 BMW i8
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Breather Tube - Aluminum
2X Entries For Our G87 M2 Sweepstakes!
URO Premium - Corporate Logo
T#:31622548
Part#: 17127515502-PRM
In Stock
$ 24.99 USD
Free Shipping on orders $49 and up

Hose From Radiator Bottom - Thermostat CHR0800
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38195379
Part#: 17127617368
In Stock
$ 45.99 USD
Free Shipping on orders $49 and up

Rein - Corporate Logo
T#:40985138
Part#: 17127617377
In Stock
$ 70.99

This product was last offered at the strikethrough price on
05-03-2026

$ 59.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 70.99

This product was last offered at the strikethrough price on
05-03-2026

$ 59.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
This OEM Rein coolant hose connects the auxiliary pump to the heat exchanger hose. Replace your old, cracked coolant hose with this new hose from Rein to prevent coolant loss and overheating.
Upper Coolant Hose
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Rein - Corporate Logo
T#:38195380
Part#: 17127617363
In Stock
$ 73.99 USD
Free Shipping on orders $49 and up
Rein Coolant Bleeder Screw CHW1575 - Priced Each
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Rein - Corporate Logo
T#:591955
Part#: 17111712788
In Stock
$ 4.99 USD
Free Shipping on orders $49 and up
Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.
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Water Pump Blind Plug
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Rein - Corporate Logo
T#:594382
Part#: 11531439134
In Stock
$ 7.76 USD
Free Shipping on orders $49 and up
Replacement Water Pump Blind Plug from Rein
BMW Brass Coolant Bleeder Screw - Priced Each
2X Entries For Our G87 M2 Sweepstakes!
URO Premium - Corporate Logo
T#:587673
Part#: 17111712788PRM
In Stock
$ 5.75

This product was last offered at the strikethrough price on
02-25-2026

$ 5.35 USD
Free Shipping on orders $49 and up
$ 5.35 USD
Free Shipping on orders $49 and up
Having an operational bleeder screw for your coolant system assures that when service is performed, all air pockets are removed. Having air pockets in your coolant system prevents your system from functioning properly. Your heat may not work as well and there is the potential for engine overheating if the air pocket is trapped behind the thermostat. Be sure that all of the air is bled out of your system with a new bleeder screw.
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Coolant Hose
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Rein - Corporate Logo
T#:592165
Part#: 17122754231
In Stock
$ 12.99 USD
Free Shipping on orders $49 and up

Upper Radiator Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:557631
Part#: 17122754222
Ships in 4 Business Days
$ 58.99 USD
Free Shipping
$ 58.99 USD
Free Shipping

Radiator Hose - Lower
For vehicles with manual transmissions
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:29732515
Part#: 17121475574
In Stock
$ 20.99 USD
Free Shipping on orders $49 and up
$ 20.99 USD
Free Shipping on orders $49 and up

Lower Radiator Hose CHR0926 is a premium replacement part designed to ensure the efficient operation of your vehicle's cooling system. Specifically crafted for a perfect fit, this durable hose ensures the proper flow of coolant between the radiator and engine, preventing overheating and maintaining optimal engine performance. Constructed from durable materials, the Lower Radiator Hose CHR0926 offers excellent heat resistance and long-lasting reliability, making it an ideal solution for any vehicle.

Available at Turner Motorsport, this radiator hose is engineered for easy installation and guarantees a direct fit for seamless compatibility with various vehicle models. Whether you're maintaining or upgrading your cooling system, the Lower Radiator Hose CHR0926 is essential for optimal performance and durability.

  • Precision-engineered for a direct fit
  • Reinforced materials for durability and heat resistance
  • Prevents overheating by ensuring proper coolant flow
  • Designed to withstand high temperatures and pressures
  • Easy installation for hassle-free replacement
  • Available at Turner Motorsport, trusted for quality automotive parts

Upgrade your vehicle’s cooling system with the Lower Radiator Hose CHR0926 for reliable performance and enhanced engine longevity.

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Upper Radiator Hose
Manual Transmissions @ Breather tube
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592183
Part#: 17127515501
In Stock
$ 12.99 USD
Free Shipping on orders $49 and up
$ 12.99 USD
Free Shipping on orders $49 and up

Behr - Corporate Logo
T#:33047035
Part#: 17117634565
In Stock at Vendor
$ 156.99

This product was last offered at the strikethrough price on
05-07-2026

$ 140.99 USD
Free Shipping on orders $49 and up
$ 140.99 USD
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Pump To Radiator Hose Upper
to Water Pump
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Rein - Corporate Logo
T#:592187
Part#: 17127515989
Ships in 4 Business Days
$ 18.99 USD
Free Shipping on orders $49 and up
$ 18.99 USD
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Radiator Hose Lower
Production: -04/30/2005
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Rein - Corporate Logo
T#:592175
Part#: 17127515489
Ships in 4 Business Days
$ 22.99 USD
Free Shipping on orders $49 and up
$ 22.99 USD
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Coolant Hose - Upper
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Rein - Corporate Logo
T#:592193
Part#: 17127535901
Ships in 4 Business Days
$ 12.99 USD
Free Shipping on orders $49 and up
Rein Reservoir Hose R50 / R52
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Rein - Corporate Logo
T#:34114213
Part#: 17127526414
Ships in 4 Business Days
$ 9.99 USD
Free Shipping on orders $49 and up

Reservoir Hose CHE0885 is a top-quality replacement part designed for BMW vehicles, ensuring a reliable connection between your vehicle’s reservoir and cooling system. Engineered for durability and heat resistance, this hose provides a seamless flow of coolant to maintain optimal engine temperature, preventing overheating. Reservoir Hose CHE0885 is made to meet or exceed OEM specifications, ensuring a perfect fit for your BMW. Available through Turner Motorsport, this hose is an essential component for keeping your vehicle's cooling system functioning efficiently.

  • High-quality reservoir hose for BMW vehicles
  • Ensures reliable coolant flow for optimal engine performance
  • Made from heat-resistant, durable materials
  • Prevents overheating and engine damage
  • Meets or exceeds OEM specifications
  • Perfect fit for a variety of BMW models
  • Available from trusted supplier Turner Motorsport
  • Easy to install with secure connections
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Upper Radiator Hose
to Breather Tube
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Rein - Corporate Logo
T#:592179
Part#: 17127515500
In Stock
$ 7.71 USD
Free Shipping on orders $49 and up
$ 7.71 USD
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Coolant Hose - Short
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Rein - Corporate Logo
T#:591825
Part#: 11517829913
Ships in 4 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up
Coolant Pipe W/ O-ring - Metal
2X Entries For Our G87 M2 Sweepstakes!
URO Premium - Corporate Logo
T#:39059283
Part#: 11537589713-PRM
Ships in 2 Business Days
$ 145.99 USD
Free Shipping on orders $49 and up
Rein - Corporate Logo
T#:46478556
Part#: EPT0238
Ships in 4 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
These expansion tanks tend to leak and will need replaced

Upper Radiator Hose
Automatic Transmissions @ Breather tube
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592200
Part#: 17127556614
Back Ordered
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
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Coolant Expansion Tank W/ Cap
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Rein - Corporate Logo
T#:592210
Part#: 17137529273
In Stock at Vendor
$ 44.99 USD
Free Shipping on orders $49 and up
Radiator Hose - Lower
For vehicles with automatic transmissions
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Rein - Corporate Logo
T#:592196
Part#: 17127541094
In Stock at Vendor
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up

Cooling Fan Resistor Repair Upgrade Kit
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URO Premium - Corporate Logo
T#:587697
Part#: 17117541092R
Ships in 2 Business Days
$ 38.99 USD
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Low speed fan resistor
Upper Radiator Hose
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Rein - Corporate Logo
T#:592162
Part#: 17122754221
In Stock
$ 32.29

This product was last offered at the strikethrough price on
06-29-2026

$ 30.99 USD
Free Shipping on orders $49 and up
$ 30.99 USD
Free Shipping on orders $49 and up

Upper Radiator Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:3136231
Part#: 17129800479
Ships in 2 Business Days
$ 33.99 USD
Free Shipping on orders $49 and up
$ 33.99 USD
Free Shipping on orders $49 and up

Rein - Corporate Logo
T#:45757431
Part#: 11539488188
Ships in 4 Business Days
$ 55.99 USD
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$ 55.99 USD
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The coolant return hose is responsible for taking cooling from the turbocharger and returning it back to the engine coolant system, allowing a free flow of coolant to keep the turbocharger temperatures under control.
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Lower Radiator Hose To Thermostat Housing
Thermostat Housing to Pipe Elbow
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Rein - Corporate Logo
T#:592151
Part#: 17121475561
Ships in 4 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Coolant Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:20815179
Part#: 11537629401
Ships in 4 Business Days
$ 67.99 USD
Free Shipping on orders $49 and up


Coolant Hose
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Rein - Corporate Logo
T#:592158
Part#: 17122754219
Ships in 4 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up
Upper Radiator Hose - Short Section
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Rein - Corporate Logo
T#:592156
Part#: 17122754203
Ships in 4 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up