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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$ 100.36 USD
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BMW N20 2.0L Thermostat With Housing
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T#:18003828
Part#: 11538635689
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Sale - Save 20% $ 67.99

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$ 54.39 USD
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BMW N20 2.0L Thermostat With Housing ensures optimal engine performance by maintaining the correct operating temperature. This crucial component regulates coolant flow, preventing issues related to overheating or inadequate cooling. The thermostat plays a vital role in your BMW’s temperature gauge, influencing engine efficiency and longevity.

  • Precision Temperature Control: Maintains the engine within the ideal temperature range for optimal performance and efficiency.
  • Complete Assembly: Includes the thermostat and housing, offering a convenient and comprehensive solution for replacements.
  • Reliable Operation: Helps prevent common issues such as overheating or running too cool by regulating coolant flow effectively.
  • Enhanced Engine Life: Ensures the engine operates under ideal conditions, extending its lifespan and improving overall performance.
  • High-Quality Construction: Designed to meet or exceed OEM specifications, providing durability and reliable performance.

Upgrade your BMW with the N20 2.0L Thermostat With Housing to ensure reliable temperature management and enhanced engine performance.

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Water Pump - N20 N26
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T#:29666093
Part#: 11518635089
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Sale - Save 20% $ 343.99

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05-03-2026

$ 275.19 USD
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$ 343.99

This product was last offered at the strikethrough price on
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$ 275.19 USD
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A failing water pump can show early warning signs like coolant leaks or a whining noise from the engine bay—but with electric water pumps, failure can be sudden, often with no warning beyond rapid overheating.

If you suspect your water pump is on its way out, prompt replacement is critical to avoid engine damage. Stay alert to any changes in cooling system performance.

Note: Aluminum mounting bolts are single-use and must be replaced during installation.

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Thermostat
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T#:26538316
Part#: 11537601158
In Stock
Sale - Save 20% $ 95.99

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$ 76.70 USD
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$ 76.70 USD
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Coolant Hose
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T#:30729015
Part#: 17127599450
Ships on Aug 11, 2026
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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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$ 11.99 USD
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Low Temperature Thermostat - 97C
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T#:33612901
Part#: 11537601158-97C
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This product was last offered at the strikethrough price on
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$ 76.70 USD
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$ 95.99

This product was last offered at the strikethrough price on
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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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$ 3.26 USD
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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
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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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