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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

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T#:30828065

Part#: 11538635689M

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Sale - Save 20% $ 125.99

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

$ 100.36 USD

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$ 125.99

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

$ 100.36 USD

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Race German Coolant Temperature Sender Adapter - M12x1.5

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T#:6827887

Part#: RGCTSAM12

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$ 35.99 USD

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$ 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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Race German Coolant Temperature Sender Adapter - 1/8NPT

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T#:6827888

Part#: RGCTSA1/8NPT

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$ 35.99 USD

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$ 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 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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Thermostat

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T#:26538316

Part#: 11537601158

In Stock

Sale - Save 20% $ 95.99

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

$ 76.70 USD

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

$ 76.70 USD

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Coolant Hose

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T#:30729015

Part#: 17127599450

Ships on Aug 11, 2026

Sale - Save 20% $ 50.99

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

$ 40.79 USD

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This product was last offered at the strikethrough price on
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$ 40.79 USD

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Coolant Expansion Tank Cap

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T#:36032339

Part#: 17117639020

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Sale - Save 20% $ 14.99

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05-03-2026

$ 11.99 USD

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$ 11.99 USD

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Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L

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T#:36913363

Part#: 11517602125

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Sale - Save 35% $ 4.99

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05-03-2026

$ 3.26 USD

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$ 4.99

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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.

Low Temperature Thermostat - 97C

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T#:33612901

Part#: 11537601158-97C

In Stock

Sale - Save 20% $ 95.99

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

$ 76.70 USD

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Sale - Save 20%

$ 95.99

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

$ 76.70 USD

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N54 Coolant Hose/Elbow - 11537545665

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T#:36100140

Part#: 11537545665

In Stock

Sale - Save 23% $ 16.99

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

$ 13.05 USD

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$ 16.99

This product was last offered at the strikethrough price on
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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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