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Rein BMW Cooling System Parts & Accessories for BMW X Series F15 (2014+)

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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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OEM Rein Lower Coolant Hose - N63 4.4L

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T#:554681

Part#: 17127575427

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L

Rein - Return Hose

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T#:17771593

Part#: 11537615492

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06-29-2026

$ 43.69 USD

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Replace leaking or faulty hoses with Rein premium hoses to restore your vehicle to safe and optimal performance levels.

Rein Water Hose With Gasket - Water Pump To Engine Inlet

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T#:17804808

Part#: 11537584630R

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$ 38.94 USD

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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.

OEM Rein Vent Hose - N63 4.4L

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T#:554680

Part#: 17127576363

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L

Rein Coolant Line - E70

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T#:592002

Part#: 17127536235

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Connects to the bottom of the expansion tank

Radiator Hose - Metal Flange

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T#:4826911

Part#: 17127619702

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$ 35.14 USD

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Cylinder Head Coolant Hose to keep your motor healthy for many miles ahead. Replace damaged or worn coolant hose with upgraded metal flange from Rein.

Upper Radiator Hose

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T#:599684

Part#: 17127586774

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Intercooler Expansion Tank

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T#:584477

Part#: 17137647281

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$ 68.39 USD

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Rein Turbocharger Coolant Line CHU0902

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T#:34147744

Part#: 11537577012

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$ 68.99

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05-03-2026

$ 60.99 USD

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Rein Turbocharger Coolant Line CHU0902 is a high-quality replacement part designed to ensure optimal cooling for BMW turbocharged engines. This coolant line, available from Turner Motorsport, is engineered to efficiently regulate coolant flow to prevent overheating of the turbocharger, protecting it from damage and extending its lifespan. The Rein Turbocharger Coolant Line CHU0902 offers a perfect OEM fit for seamless installation, making it an ideal choice for both professional mechanics and BMW enthusiasts.

Constructed with durable, heat-resistant materials, this coolant line ensures long-lasting performance and reliability. It’s a vital component for maintaining engine efficiency and maximizing the performance of your BMW’s turbo system.

Key Features:

Designed for BMW turbocharged engines to prevent turbo overheating
Perfect OEM fit for easy, hassle-free installation
Efficient coolant regulation improves engine and turbocharger longevity
Made from durable, heat-resistant materials for long-term reliability
Available from Turner Motorsport, a trusted source for BMW parts and performance upgrades

For BMW owners looking to enhance engine performance and protect the turbo system, the Rein Turbocharger Coolant Line CHU0902 is a must-have upgrade.

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BMW Turbo Cooling Line

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T#:46478582

Part#: CHT0690

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$ 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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OEM Rein Water Pump Coolant Hose - BMW F15 F16 N55 3.0L

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T#:45757475

Part#: 11537649394

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$ 64.19 USD

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This hose connects the primary water pump to the thermostat housing. Coolant hoses can become brittle over time, leading to cracks and coolant leaks. If your coolant hose is leaking, replace it early to prevent coolant loss and eventual overheating.

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OEM Rein Lower Radiator Coolant Hose - E70 E71 F15 F16 N63

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T#:17738371

Part#: 17127576358

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$ 69.34 USD

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Rein Coolant Hose CHK0722 is a high-performance replacement hose that connects the lower radiator to the water pump.

Return Hose

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T#:17704695

Part#: 11537637059

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OE quality return hose for the cooling system.

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