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BMW Cooling System Parts & Accessories for BMW X Series F25 (2011+)

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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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Bav Auto Water Pump - BMW N54 N55

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T#:637476

Part#: 11517632426

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Water pumps are a critical component of your cooling system. A failed water pump will stop the flow of coolant in your vehicle, leading to overheating and eventual engine damage. Replace your faulty or aging water pump with a high-quality Bav Auto unit. Replacement for BMW part # 11517632426 and 11517563659. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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BMW N20 2.0L Thermostat With Housing

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T#:18003828

Part#: 11538635689

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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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$ 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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BMW N20 2.0L Turbo Supply Cooling Line

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T#:17704760

Part#: 11538663516

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$ 37.59 USD

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BMW N20 2.0L Turbo Supply Cooling Line is a crucial component designed to ensure optimal cooling for the turbocharger in BMW vehicles equipped with the N20 2.0L turbo engine. This high-quality cooling line maintains proper coolant flow to the turbo, preventing overheating and ensuring reliable performance.

Optimal Cooling: Effectively cools the turbocharger to prevent overheating and maintain performance.
Durable Construction: Built with high-quality materials for long-lasting reliability.
Precise Fitment: Designed specifically for BMW N20 2.0L turbo engines.
Enhanced Performance: Helps in sustaining the turbo's efficiency and longevity.
Easy Installation: Direct replacement part for a hassle-free installation.

Maintain the efficiency and longevity of your BMW’s turbocharger with this essential cooling line, designed for superior performance and durability.

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BMW N20 Turbo Cooling Return Line

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T#:17704762

Part#: 11538663517

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$ 68.99

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$ 50.99 USD

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BMW N20 Turbo Cooling Return Line

The BMW N20 Turbo Cooling Return Line is an essential component designed to optimize the performance and longevity of your turbocharger. Turner Motorsport offers this high-quality coolant return line, ensuring efficient cooling and preventing overheating of the turbo system. Engineered for a precise fit, this cooling return line integrates seamlessly with your BMW N20 engine, providing reliable and long-lasting performance.

Benefits:

Enhances cooling efficiency to prevent turbocharger overheating
Constructed from durable materials for extended reliability
Precisely engineered for a perfect fit on BMW N20 engines
Easy to install with minimal modifications required
Helps maintain consistent turbocharger performance by managing coolant flow effectively

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Rein Coolant Hose - BMW F22/23 F3X

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T#:594310

Part#: 11537639997

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$ 57.99 USD

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Water pipes and coolant hoses are essential for proper cooling. If they are cracked, they are going to need to be replaced as soon as possible to avoid overheating your engine.

Rein Water Hose With Gasket - Water Pump To Engine Inlet

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T#:17804808

Part#: 11537584630R

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Rein OE quality water hoses are designed to be direct replacements for OE hoses and assemblies. This includes the hose and clamps.

Coolant Connection Flange - N47

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T#:4840519

Part#: 11127810707

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$ 47.99

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Keep Your Coolant System Operating Properly And Leak Free. Quality Rein coolant flange attaches to the engine block below the intake manifold and flows coolant out of the engine.

Rein Coolant Hose - BMW F22/23 F3X

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T#:591823

Part#: 11537639998

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Connects from water pump to block

Coolant Expansion Tank

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T#:592029

Part#: 17138616418

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Replaced your cracked unit with a new coolant expansion tank

BMW Turbo Cooling Line

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T#:46478582

Part#: CHT0690

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$ 56.00

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Your turbo is constantly working under extreme heat and pressure, generating serious boost every time you get on the gas. The turbo cooling lines are responsible for circulating coolant through the turbocharger, keeping temperatures in check and safeguarding internal components from excessive heat. With time, these lines can corrode, crack, or clog—compromising coolant flow and system efficiency. If left unchecked, a failing line can lead to overheating, loss of performance, or even costly turbo damage. Why replacing them matters: Protect your turbo – Ensures proper cooling to prevent heat soak and extend turbo life. Stop leaks early – Prevent small coolant drips from turning into bigger, more expensive problems. Keep performance consistent – Reliable cooling means steady boost and dependable operation. Don’t let a tired cooling line put your turbo at risk—replace it and keep your forced-induction system performing at its best.

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Rein Turbo Cooling Line - Return

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T#:17771598

Part#: 11538663517

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$ 86.99

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Rein turbo hoses are manufactured with premium OE quality material to offer maximum protection from premature failures.

Rein Water Pump Service Kit - N20

Production years 2013-2014

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T#:14023861

Part#: 11518635089-4

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Kits include: water pump thermostat assembly head to thermostat hose w/ aluminum flange WP to engine hose WP to thermostat hose all necessary clamps and hardware This Rein water pump service kit addresses common coolant hose plastic flange failure and ensures that the water pump replacement repair is done right the first time. The water pump and thermostat are OEM Use of OE or Pentosin NF-G11 coolant is recommended

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Lower Radiator Coolant Hose

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T#:594374

Part#: 17127639213

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$ 36.29 USD

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Replacement Lower Radiator Coolant Hose from Rein

Water Pump Service Kit

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T#:38161728

Part#: 11515A05704

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$ 749.99 USD

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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

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T#:639833

Part#: 13621433076

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$ 11.99 USD

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This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OEM Rein Coolant Expansion Tank Overflow Hose - BMW F25 X3, F26 X4 N5...

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T#:45757476

Part#: 17128651298

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This hose connects the expansion tank to the upper radiator hose. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.

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