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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OEM Style Hose Clamps
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Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
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Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
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Turner Motorsport Silicone Radiator Hoses - F2X F3X N20
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Turner Motorsport - Corporate Logo
T#:50311460
Part#: 008745LA01-01
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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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Schwaben Coolant Refill/Air Purge Tool
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Schwaben - Corporate Logo
T#:362940
Part#: 003466SCH01
Ships in 8 Business Days
Sale - Save 20% $ 109.99

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$ 87.99 USD
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When it comes to BMW's we all know the weak point is commonly in the cooling system, many models proving hard to bleed the air pockets out after the refresh. The coolant refill tool solves this problem, ensuring that you get an air pocket free fill. The entire task is as simple as draining the system like normal, reinstalling the drain plugs and hooking the tool up to your refill location. The reason this tool works so well is due to the venturi valve, it converts air pressure from the compressor to vacuum inside the cooling system, then with a twist of a valve sucks coolant right into the system using the vacuum pressure.
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Coolant Vacuum Purge & Refill Tool Set
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Schwaben - Corporate Logo
T#:402498
Part#: 024948SCH01A
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$ 86.99 USD
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The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.
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Thermostat With Aluminum Housing - N20
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Bremmen Parts - Corporate Logo
T#:30828065
Part#: 11538635689M
In Stock
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$ 100.36 USD
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Coolant Hose - Return Line
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Bremmen Parts - Corporate Logo
T#:30729013
Part#: 17128570061
In Stock
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$ 29.99 USD
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Electronic Thermostat And Coolant Distribution Module
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Bremmen Parts - Corporate Logo
T#:26538308
Part#: 11537642854
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$ 292.63 USD
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Connector - Upgraded Aluminum Metal
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Bremmen Parts - Corporate Logo
T#:27205374
Part#: 11118511205
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$ 34.39 USD
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Hose F Engine Inlet-Changeover Valve
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Bremmen Parts - Corporate Logo
T#:30729011
Part#: 17128616914
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$ 56.30 USD
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Radiator Pressure Tester Kit
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Schwaben - Corporate Logo
T#:391482
Part#: 014710SCH01A
In Stock
Sale - Save 25% $ 205.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 154.49 USD
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Are you refreshing your coolant system or having issues with coolant loss? An easy way to test your system for leaks and ensure you're able to maintain pressure without coolant loss is the Schwaben Cooling System Pressure Tester Kit.
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Engine Coolant Expansion Tank
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Bremmen Parts - Corporate Logo
T#:30729009
Part#: 17138677649
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$ 75.59 USD
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Thermostat - B48
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For vehicles with the Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Bremmen Parts - Corporate Logo
T#:23648673
Part#: 11537644811
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$ 190.39 USD
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Coolant Outlet Connector - B58A (F3X, G30, G01/G02)
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Bremmen Parts - Corporate Logo
T#:36913371
Part#: 11118619408
In Stock
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$ 28.89 USD
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The Coolant Outlet Connector connects the engine block coolant outlet to the upper radiator hose.

Due to fragile plastic construction and consistent exposure to hot, chemical-rich engine coolant, this piece is prone to degradation and (potentially) complete failure.

Whether you're fixing a failed connector or preemptively replacing this failure-prone component, choose this quality replacement from Bremmen Parts for a lasting repair.

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Schwaben Locking Hose Pinch-Off Pliers
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Schwaben - Corporate Logo
T#:379950
Part#: 009787SCH01A
In Stock
Sale - Save 15% $ 39.99

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Schwaben Locking Hose Pinch-Off Pliers have adequate clamping force to effectively seal large or pressurized cooling system hoses. These pliers are ideal for clamping shut most hoses, ensuring reliability in your automotive tasks. With swivel jaws, they provide even clamping force, making them a versatile tool for various applications.

  • Adequate clamping force for large or pressurized hoses
  • Ideal for clamping shut most hoses
  • Swivel jaws ensure even clamping force
  • Versatile tool for automotive maintenance

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. For more information, visit http://www.p65warnings.ca.gov.

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Junction Heat Hose - 11538606278
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Bremmen Parts - Corporate Logo
T#:36913362
Part#: 11538606278
In Stock
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$ 43.24 USD
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This junction heat hose, made from rubber, is prone to cracking, dry rot, and brittleness over time, often leading to coolant leaks at the front of the engine. Such leaks pose a significant risk to your engine’s health, as rapid coolant loss can cause overheating and severe damage.

Replace your worn or leaking heat hose with this high-quality OE replacement from Bremmen Parts. Engineered for a precise fit and long-lasting performance, this hose ensures a reliable repair and helps protect your engine from potential overheating.

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B58 Coolant Hose - Auxiliary Water Pump to Turbocharger
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Bremmen Parts - Corporate Logo
T#:36981057
Part#: 11538611277
In Stock
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$ 52.69 USD
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This Bremmen Parts Coolant Hose is designed to connect the turbocharger to the auxiliary water pump, providing a premium replacement for B58-equipped BMW models. Constructed with high-quality, heat-resistant materials, this hose ensures reliable and efficient engine cooling, even under extreme temperatures. Engineered to meet OEM specifications, it offers a precise fit and a secure connection, optimizing coolant flow to maintain the performance and longevity of your BMW’s turbocharged engine.

Key Benefits:

Premium Materials: Crafted from heat-resistant materials to endure high-temperature conditions. OEM-Compatible Fit: Matches BMW’s original specifications for an easy, hassle-free installation. Enhanced Cooling: Designed to support efficient coolant flow in turbocharged engines. Durable Construction: Built to last, minimizing the need for frequent replacements and ensuring long-term reliability.

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Cylinder Head Expansion Tank Hose - Priced Each
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Bremmen Parts - Corporate Logo
T#:30729010
Part#: 17129845173
In Stock
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$ 27.19 USD
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Coolant Hose - Upper
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Bremmen Parts - Corporate Logo
T#:30729014
Part#: 17127604542
In Stock
Sale - Save 12% $ 41.99

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$ 36.89 USD
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Coolant Hose - Upper
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Bremmen Parts - Corporate Logo
T#:30729016
Part#: 17127596837
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$ 52.22 USD
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Schwaben Radiator/ Intercooler Fin Comb
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Schwaben - Corporate Logo
T#:384260
Part#: 015326SCH01A
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$ 14.99 USD
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Straighten bent fins in heat exchangers like radiators, condensers, and intercoolers obstruct air flow and reduce heat transfer. Paper-thin fins are easily bent, even by slight pressure.

Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L
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Bremmen Parts - Corporate Logo
T#:36913363
Part#: 11517602125
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This external torx head screw is a direct replacement for the costly OEM screw, which must be replaced during every water pump service.

Quantity 3 required for complete replacement.


Coolant Hose - Lower
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Bremmen Parts - Corporate Logo
T#:48125816
Part#: 17127596838
In Stock
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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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