Bremmen Parts BMW Cooling System Parts & Accessories for BMW X Series E84 (2013-2015)

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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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Thermostat With Aluminum Housing - N20
Thermostat With Aluminum Housing - N20
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T#:30828065
Part#: 11538635689M
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Thermostat
Thermostat
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T#:26538316
Part#: 11537601158
Ships on Jul 7, 2026
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$ 95.99

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Coolant Hose
Coolant Hose
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T#:30729015
Part#: 17127599450
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$ 40.79 USD
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$ 50.99

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Coolant Expansion Tank Cap
Coolant Expansion Tank Cap
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T#:36032339
Part#: 17117639020
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Low Temperature Thermostat - 97C
Low Temperature Thermostat - 97C
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T#:33612901
Part#: 11537601158-97C
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Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L
Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L
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T#:36913363
Part#: 11517602125
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$ 3.26 USD
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This external torx head screw is a direct replacement for the costly OEM screw, which must be replaced during every water pump service.

Quantity 3 required for complete replacement.

N54 Coolant Hose/Elbow - 11537545665
N54 Coolant Hose/Elbow - 11537545665
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T#:36100140
Part#: 11537545665
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$ 13.05 USD
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This Coolant Hose is located behind the thermostat on N54-equipped BMW models. Due to weak rubber construction and its close proximity to the bank one turbocharger, this hose is a common failure item on high-mileage vehicles.

Whether you are replacing a failed hose or preemptively servicing your cooling system, choose this high-quality replacement from Bremmen Parts for a lasting repair.

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