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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 Spill-Proof Coolant / Antifreeze Funnel

10X Entries Into Our F80 M3 Sweepstakes

T#:580395

Part#: B8800082

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08-19-2026

$ 28.99 USD

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Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

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T#:580348

Part#: B8800019

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05-03-2026

$ 23.99 USD

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Used to remove your fan clutch

Rein Coolant Hose - BMW F22/23 F3X

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T#:594310

Part#: 11537639997

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08-31-2026

$ 55.09 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.

Bav Auto Angled Hose Pinch Plier Set - 2pc

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T#:580379

Part#: B8800058

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05-03-2026

$ 24.74 USD

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Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

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Rein Coolant Hose - BMW F22/23 F3X

2X Entries Into Our F80 M3 Sweepstakes

T#:591823

Part#: 11537639998

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08-31-2026

$ 40.84 USD

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Connects from water pump to block

BMW Turbo Cooling Line

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T#:46478582

Part#: CHT0690

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04-28-2026

$ 52.98 USD

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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 Water Pump Service Kit - N20

Production years 2013-2014

2X Entries Into Our F80 M3 Sweepstakes

T#:14023861

Part#: 11518635089-4

Ships in 4 Business Days

Sale - Save 5% $ 898.99

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08-31-2026

$ 854.04 USD

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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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Rein Turbo Cooling Line - Return

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T#:17771598

Part#: 11538663517

Ships in 3 Business Days

Sale - Save 17% $ 86.99

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05-07-2026

$ 72.28 USD

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

Water Pump

2X Entries Into Our F80 M3 Sweepstakes

T#:38161720

Part#: 11517632426

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Sale - Save 5% $ 782.99

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08-31-2026

$ 743.84 USD

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Engine Coolant Thermostat - F25 F26 - N55

2X Entries Into Our F80 M3 Sweepstakes

T#:55965845

Part#: 11537586784

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08-31-2026

$ 81.69 USD

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Maintain exact control over your N55’s operating temperatures under demanding street and track conditions with this Rein replacement thermostat unit. Engineered to match factory standards, this complete housing and thermostat assembly ensures your cooling system handles thermal loads flawlessly to prevent heat soak or dangerous overheating.

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Lower Radiator Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:594374

Part#: 17127639213

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This product was last offered at the strikethrough price on
08-13-2026

$ 36.09 USD

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Replacement Lower Radiator Coolant Hose from Rein

Water Pump Service Kit

2X Entries Into Our F80 M3 Sweepstakes

T#:38161728

Part#: 11515A05704

Ships on Sep 22, 2026

Sale - Save 5% $ 749.99

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08-31-2026

$ 712.21 USD

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

2X Entries Into Our F80 M3 Sweepstakes

T#:45757476

Part#: 17128651298

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$ 29.89 USD

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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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