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BMW Cooling System Parts & Accessories for BMW 3 Series F34 (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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Thermostat Installation Kit with Thermostat - N54, N55, S55

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T#:55353595

Part#: OTN54.T85KT3

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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.

Turner Motorsport Silicone Radiator Hoses - F2X F3X N20

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T#:50311460

Part#: 008745LA01-01

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This product was last offered at the strikethrough price on
06-14-2026

$ 76.49 USD

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$ 76.49 USD

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Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, our Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, Turner Motorsport hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Replaces OEM Part Numbers: 17127596837 & 17127596838. Can be used with your factory connectors.

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Turner Motorsport Silicone Radiator Hoses (With OE Connectors) - F2X ...

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T#:50311459

Part#: 008745LA02

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$ 189.99 USD

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Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, our Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, Turner Motorsport hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Replaces OEM Part Numbers: 17127596837 & 17127596838. Pre-assembled with factory "quick-connect" hose ends for easy installation!

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URO Coolant Outlet Flange - BMW F2X 1

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T#:50031880

Part#: 11118619408

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$ 55.99 USD

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Replaces the plastic OE flange with durable aircraft-quality aluminum.

Rein Engine Inlet To Changeover Valve Hose

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T#:52903280

Part#: 17128616914

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06-29-2026

$ 43.69 USD

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This Rein Automotive coolant hose is an exact-fit aftermarket solution for the BMW "By-Pass Hose".

Hudson Coolant Hose - Lower - F22, F23, F30, F31, F32, F33, F34, F36 ...

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T#:55281787

Part#: 17127596838

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$ 46.99 USD

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Connects the thermostat to the radiator

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

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Universal fitment design - modifications may be necessary to run this cooler

T#:53608839

Part#: 8371

Ships in 4 Business Days

$ 499.00 USD

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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.

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BMW Coolant Pipe - BMW F22/23 F3X

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For vehicles with automatic transmissions only.

T#:50031885

Part#: 11537639997

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$ 49.99 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. Wear is easy to see on these rubber hoses. Bulges, cracking, splitting at connections, and the loss of flexibility are usually big indicators that they are reaching the ends of their lives. Replace them whenever this wear is identified. Genuine BMW Feed Line - This item fits the following BMW Chassis: E89 Z4,F10,F22,F30,F31,F32,F33,F34,F36 Fits BMW Engines including: N20,N26

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Rein Thermostat Assembly - F Chassis, G-Chassis - B48

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T#:53891628

Part#: 11537644811

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Sale - Save 15% $ 322.99

This product was last offered at the strikethrough price on
06-10-2026

$ 274.43 USD

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$ 274.43 USD

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Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.

Engine Coolant Hose F22, F23, F30, F31, F34, F32, F33, F36 - B48 ...

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T#:53644215

Part#: URO-023423

Ships in 2 Business Days

$ 65.99 USD

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This high-quality hose from URO prevents overheating by maintaining a stable engine temperature, allowing for optimal performance and extended engine life.

Rein Aluminum Oil Filter Housing - BMW B58

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T#:49404665

Part#: 11428583901

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$ 388.03 USD

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For those who push their engines to the limit, "good enough" is a liability. Upgrade to the Rein HEU0116 Aluminum Oil Filter Housing—the professional’s choice for durability and peace of mind.

URO Turbo Coolant Return Line - BMW Gen1 B58 3.0L

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T#:53079363

Part#: 11538666857

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05-26-2026

$ 62.69 USD

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Replacement coolant return hose running from the turbocharger to the auxiliary water pump.

Rein Water Hose With Metal Flange - F-Chassis - N55

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T#:53750147

Part#: CHU0632

Ships in 4 Business Days

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$ 50.29 USD

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Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges

Vargas Remote Oil Cooler Adapter - BMW B58, Toyota A90/A91

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T#:51778122

Part#: VTT-B58-OIL-COOL

Ships on Jul 20, 2026

$ 157.99 USD

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The VTT Billet B58 Remote Oil Cooler Adapter is an ideal upgrade for B58-powered platforms.

Vargas Expansion Tank Coolant Hose - Blue - BMW B58 F2X F3X

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T#:51848504

Part#: VTT-B58-CEBLUE

Ships in 4 Business Days

$ 59.99 USD

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Elevate your BMW's engine bay while safeguarding your cooling system with the VTT B58 Expansion Tank Hose in Blue.

Vargas Billet Upper Coolant Line Block-Off - BMW N55 & S55 Engines ...

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T#:52094575

Part#: VTT-FAB-047

Ships on Jul 20, 2026

$ 21.99 USD

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When building a custom turbo kit, the "VTT-FAB-047" Block-Off Flange is an essential component for managing your BMW's thermal systems.

Vargas Billet HMM Delete Kit - BMW B58TU

Fits all B58 TU / Gen 2 B58 engines

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T#:51672725

Part#: VTT-B58-COOLING-

Ships on Jul 20, 2026

$ 199.99 USD

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The VTT Billet B58 HMM Delete is for enthusiasts who want to remove the bulky, plastic factory coolant unit in favor of a robust, motorsport-oriented setup.

Vargas Billet Coolant Block-Off - BMW B58 Engine

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T#:52094566

Part#: VTTFAB040BLKB58

Ships on Jul 20, 2026

$ 31.99 USD

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Engineered for precision and durability, the VTT-FAB-040 B58 Block-Off Flange is the definitive solution for managing oil and coolant paths during fabrication.

OEM Bosch Charge Air Cooler Water Pump

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T#:54744791

Part#: 039202411C

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$ 143.99 USD

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Coolant pump for the charge air cooling system.

N55 Mosselman Billet Oil Thermostat - Black

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T#:50101777

Part#: 30210057

Ships in 8 Business Days

$ 399.00 USD

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The N55 engine is no stranger to oil cooling problems, that’s why we recommend installing the MSL Oil Thermostat. The standard oil thermostat will reach around 120 degrees Celsius with a normal driving style. The MSL Oil Thermostat will open at a lower temperature than the standard oil thermostat (at 85 degrees Celsius) and will keep the temperature stable between 95 and 105 degrees Celsius. Installing the MSL thermostat ensures a cooler oil temperature which will result in more stable performance, but above all this improves the reliability of the engine. It is recommended to install the thermostat, especially for cars that are tuned.

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Coolant Hose - Lower

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T#:48125816

Part#: 17127596838

Ships on Aug 10, 2026

Sale - Save 15% $ 30.99

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05-03-2026

$ 26.34 USD

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Connects the radiator to the thermostat.

Maintain optimal cooling performance with this high-quality Lower Radiator Hose (17127596838), built to match OEM dimensions for a seamless fit on your BMW. Designed to handle high heat and constant pressure, it ensures consistent coolant flow from the radiator to the thermostat housing. Perfect for preventative maintenance or replacing a failing hose, this direct-fit component helps safeguard your engine from overheating and keeps your cooling system operating at peak efficiency.

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URO Coolant Bypass Hose - B48

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T#:54851970

Part#: 17128616914

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$ 44.99 USD

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On the street or at the track, your cooling system is under constant attack from extreme heat, pressure, and vibration. If your factory bypass hose is looking soft or crusty, it's a ticking time bomb. This heavy-duty replacement hose is engineered to restore factory-level reliability with track-ready durability.

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Rein Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11,...

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T#:53856297

Part#: 11538611277

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06-29-2026

$ 42.27 USD

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Rein Automotive Turbo Hoses are engineered to meet these rigorous standards, utilizing premium, OE-quality materials specifically formulated to withstand the extreme duty cycles of modern forced-induction systems.

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