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BMW Cooling System Parts & Accessories

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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Vaico - Corporate Logo
T#:595421
Part#: 17127575428
Ships in 2 Business Days
$ 143.99

This product was last offered at the strikethrough price on
08-13-2026

$ 80.99 USD
Free Shipping on orders $49 and up
$ 80.99 USD
Free Shipping on orders $49 and up
Overflow hoses connect the radiator and the expansion tank to store overflow of coolant. As pressures in the cooling system increase due to coolant temperatures, a valve on the radiator cap permits coolant back into the reservoir to help ease the build-up of pressure and prevent coolant loss. If your hose is leaking or damaged, we recommend swapping it out with this replacement from Vaico.
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Vaico - Corporate Logo
T#:595431
Part#: 17127591512
Ships in 1 Business Day
$ 185.99

This product was last offered at the strikethrough price on
05-08-2026

$ 179.99 USD
Free Shipping on orders $49 and up
$ 179.99 USD
Free Shipping on orders $49 and up
Replacement coolant hose that connects the expansion tank to the auxiliary water pump. Replace your old hose to prevent coolant loss and overheating.
Vaico Radiator Return Coolant Hose - BMW E70 X5 35d M57
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:21965996
Part#: 17127794153
Ships in 1 Business Day
$ 245.99

This product was last offered at the strikethrough price on
05-08-2026

$ 238.99 USD
Free Shipping on orders $49 and up
$ 238.99 USD
Free Shipping on orders $49 and up
Returns coolant from the engine to the radiator

Vaico - Corporate Logo
T#:595257
Part#: 11531711384
Ships in 1 Business Day
$ 129.99

This product was last offered at the strikethrough price on
05-08-2026

$ 125.99 USD
$ 125.99 USD
This hose connects the radiator outlet hose to the transmission heat exchanger

Vaico - Corporate Logo
T#:595408
Part#: 17127537101
Ships in 2 Business Days
$ 135.99

This product was last offered at the strikethrough price on
08-13-2026

$ 55.99 USD
Free Shipping on orders $49 and up
$ 55.99 USD
Free Shipping on orders $49 and up
Returns coolant from the transmission heat exchanger to the radiator
Vaico Lower Radiator Hose - BMW Z4 2.5 3.0 M54
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:363540
Part#: 17127514405
Ships in 1 Business Day
$ 96.99

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

$ 93.99 USD
Free Shipping on orders $49 and up
$ 93.99 USD
Free Shipping on orders $49 and up
Replace your leaking coolant hose and prevent engine overheating with this replacement Vaico coolant hose.

M7 Speed - Corporate Logo
T#:386325
Part#: 53-3M7104
Ships in 3 Business Days
Sale - Save 6% $ 49.99

This product was last offered at the strikethrough price on
08-31-2026

$ 47.03 USD
Free Shipping on orders $49 and up
Sale - Save 6%
$ 49.99

This product was last offered at the strikethrough price on
08-31-2026

$ 47.03 USD
Free Shipping on orders $49 and up

Have you ever noticed how crisp and responsive your MINI was after that initial warm-up period, and wanted to keep that feeling for the rest of the day? This 180° F Thermostat is the solution. Not only does the engine maintain its fresh-start power, but also the under-hood temperatures are greatly diminished (see comparison table below). Now when your car sits after a hard run it won't cook and dry out everything under the hood as bad as it did in the stock configuration. This is great for the MINI owner that lives in a hot climate, or those that push their cars hard at the track or local twisty road.

Please Note: This thermostat does not include a replacement gasket. Reuse the gasket from the OEM thermostat.

Cold Weather Alert: If you encounter weather below 50º F or 10º C, please be aware that the ECU could throw a “check engine” light. This is no cause for alarm as the sensors are registering an anomaly and the thermostat is not harming the engine. The “check engine” light can be reset with a diagnostic tool or left as is. Please call if you have questions.
 

Test ParametersThermostat Temp OriginalThermostat Temp M7180Delta (°F)

Intercooler Manifold9870-28

Upper Coolant Hose190179-11

Supercharger at Pulley Shaft Housing178160-18

Head at Thermostat174153-21

Idle w A/C on214185-29

Coolant Temp During Hard Driving212180-32

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Vaico - Corporate Logo
T#:41052807
Part#: 17127808117
Special Order: No Guaranteed ETA
$ 230.99

This product was last offered at the strikethrough price on
04-15-2026

$ 75.99 USD
Free Shipping on orders $49 and up
$ 75.99 USD
Free Shipping on orders $49 and up
Connects the lower expansion tank connection to the transmission heat exchanger

Vaico - Corporate Logo
T#:41188159
Part#: 17128602871
Special Order: No Guaranteed ETA
$ 85.99 USD
Free Shipping on orders $49 and up
Directs coolant from the engine to the radiator. Stop leaks and prevent overheating with a new upper radiator hose.