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BMW Cooling System Parts & Accessories for BMW 3 Series F34 (2014+)

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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BMW N54 N55 S55 Mosselman Thermostat Installation Kit

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T#:4799665

Part#: THERMINSTALLKT

In Stock

Sale - Save 6% $ 22.99

This product was last offered at the strikethrough price on
06-15-2026

$ 21.64 USD

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Sale - Save 6%

$ 22.99

This product was last offered at the strikethrough price on
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$ 21.64 USD

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BMW N54 N55 S55 Mosselman Thermostat Installation Kit is designed to ensure a seamless installation of the Mosselman thermostat on BMW engines. This comprehensive kit from Turner Motorsport includes all necessary gaskets and components, guaranteeing a reliable and precise installation for optimal engine performance.

Complete Kit: Includes all essential gaskets and components required for a hassle-free thermostat installation.
Optimal Performance: Ensures proper installation of the Mosselman thermostat, leading to improved engine cooling efficiency and performance.
High-Quality Components: Gaskets and parts are manufactured to meet high standards of durability and reliability.
Precision Fit: Engineered to match OEM specifications, providing a perfect fit and reliable performance.
Ease of Installation: All necessary parts are included, simplifying the installation process and reducing the need for additional purchases.

Upgrade your BMW's cooling system with the Mosselman Thermostat Installation Kit from Turner Motorsport, ensuring a top-quality, reliable setup for your engine.

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Gen1 B58 Water Pump Replacement Kit - BMW F22/23 F3X B58 3.0L ...

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T#:27871814

Part#: 11518632585TKT

Ships in 3 Business Days

Sale - Save 1% $ 154.99

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

$ 152.79 USD

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This product was last offered at the strikethrough price on
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$ 152.79 USD

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If your water pump is leaking coolant, there is a good chance one of the seals has failed. This is especially common when your coolant level gets too low and your BMW's water pump runs without coolant. The water pump shaft seal can fail as it gets too hot and you will begin to notice coolant dripping from the weep hole found at the bottom of your pump. We recommend replacing the whole pump to ensure your BMW stays cool for many more years! This kit includes the basic parts necessary to replace your water pump: GEBA Mechanical Pump with an upgraded metal impeller Elring Water Pump Gasket Genuine BMW Water Pump Bolts (x6) Don't forget to pick up a gallon of BMW coolant as well to top your system back off once you have completed your pump installation! Servicing your accessory belt and tensioner is also great to do at this time as the belt must be removed before replacing your pump.

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Water Pump & Thermostat Kit - Gen 1 B46 2.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:35863149

Part#: 11518638026TKT

In Stock

Sale - Save 5% $ 740.99

This product was last offered at the strikethrough price on
09-09-2026

$ 705.38 USD

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$ 740.99

This product was last offered at the strikethrough price on
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BMW's cooling system has long been a known weak spot, with the water pump and thermostat being two of the most common trouble areas. This remains true even in the latest B-Series engines found in 2016 and newer BMW models. This kit includes a brand-new OEM Pierburg water pump, a Bremmen thermostat (now referred to as a Heat Management Module), and one gallon of BMW's G48 coolant concentrate (enough to make two gallons of 50/50 coolant). Avoid spending thousands at the dealership or over $600 on Genuine BMW parts! These components can be replaced with high-quality OEM parts in just an afternoon using basic hand tools.

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OEM Coolant Expansion Tanks Kit - F22/23 F3X B48 B58

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T#:27605427

Part#: 17138677649TKT

Ships in 2 Business Days

Sale - Save 3% $ 208.99

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

$ 202.62 USD

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This product was last offered at the strikethrough price on
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$ 202.62 USD

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Genuine BMW expansion tanks have a bad habit of failing after a few years. This has primarily been caused by the plastic construction of the expansion tanks. After enough heat cycles, the plastic becomes brittle and can crack, causing coolant to leak out and air to enter the coolant system. If a failing expansion tank is not addressed soon enough, the coolant loss can lead to an overheating engine. This kit includes two brand new high quality expansion tanks and caps

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Thermostat Installation Kit with Thermostat - N54, N55, S55

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T#:55353595

Part#: OTN54.T85KT3

In Stock

$ 390.23 USD

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$ 390.23 USD

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High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.

Value Coolant Hose Kit - F3x - N55

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T#:56507827

Part#: F3XN55CSRL0KT2

Ships in 1 Business Day

$ 90.90 USD

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$ 90.90 USD

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Our Value Cooling Maintenance Kit addresses the three most notorious failure points in one shot before you end up stranded on the side of the road or worse, overheating your engine

Water Pump - N20 N26

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T#:29666093

Part#: 11518635089

In Stock

Sale - Save 20% $ 343.99

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

$ 275.19 USD

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Sale - Save 20%

$ 343.99

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

$ 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 Cooling System Parts & Accessories for BMW 3 Series F34 (2014+)

Sub-Categories

BMW N54 N55 S55 Mosselman Thermostat Installation Kit

Gen1 B58 Water Pump Replacement Kit - BMW F22/23 F3X B58 3.0L ...

Water Pump & Thermostat Kit - Gen 1 B46 2.0L

OEM Coolant Expansion Tanks Kit - F22/23 F3X B48 B58

Thermostat Installation Kit with Thermostat - N54, N55, S55

Value Coolant Hose Kit - F3x - N55

Water Pump - N20 N26

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