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BMW Cooling System Parts & Accessories for BMW 3 Series G20 (2019+)

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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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Titanium Coolant Bleeder Screw Upgrade

T#:38621407

Part#: BMS-TCBS

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$ 25.00 USD

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$ 25.00 USD

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Replace your fragile OEM plastic coolant bleeder screw, which is prone to cracking and failure, with a premium titanium upgrade built for strength and style under the hood. Factory plastic components weaken over time due to constant heat cycles, leading to brittleness and potential failure. Our titanium replacement delivers superior durability, being twice as strong as aluminum yet 45% lighter than steel, ensuring unmatched resilience and long-term reliability for your coolant system. More than an upgrade, it’s a must-have for engine longevity. CNC-machined from solid titanium, each screw features a laser-etched Burger Motorsports logo and is hand-burned to create unique color patterns—no two are alike. A heavy-duty replacement O-ring is included for a perfect fit.

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AutoTecknic Dry Carbon Fiber Cooling Plate - BMW G20/ G21 M340i 3-Ser...

T#:14386749

Part#: BM-0004-M340I

Ships in 8 Business Days

$ 299.00 USD

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$ 299.00 USD

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The AutoTecknic Dry Carbon Cooling Plate will provide your car with better air induction, providing the intake and engine with cooler air during high-speed driving; some customers have even reported better gas mileage and power gains.

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Coolant Return Line

T#:53856300

Part#: 11538650087

In Stock at Vendor

$ 60.99 USD

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$ 60.99 USD

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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.

OEM Rein Turbocharger Coolant Supply Line - BMW Gen2 B46/B48 2.0L ...

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:34315143

Part#: 11538629971

Ships in 4 Business Days

$ 47.99

This product was last offered at the strikethrough price on
04-28-2026

$ 42.99 USD

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$ 42.99 USD

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Turbo coolant supply lines feed coolant to the turbocharger, ensuring temperatures are kept in check. If your coolant line is leaking, it is important to replace it as soon as possible to prevent coolant loss, overheating, and turbo damage.

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Autotecknic Dry Carbon Fiber Cooling Shroud - G20 340i

T#:21209849

Part#: ATK-BM-0004-M340

Ships in 8 Business Days

$ 395.00 USD

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$ 395.00 USD

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Carbon fiber is a staple in the performance world and has been incorporated into motorsports since the early 80s. Over time companies have taken it upon themselves to create new carbon products to add to your car that may have not been originally available. Autotecknic is no different. If you're looking for a carbon addition that has been made to the highest standards with premium materials, then Autotecknic's line of carbon additions is your one-stop shop. Made from dry carbon this shroud is durable and can stand strong in any driving environment. Dry carbon is the highest-quality version of carbon fiber products that are produced. Dry carbon fiber's name comes from its manufacturing process. Dry carbon fiber is formed by using a "pre-preg" or impregnated piece of carbon materials. This piece of carbon is first placed into a mold and then into a sealed vacuum (autoclave) to properly cure. This method creates the least amount of waste and forms a lighter version of carbon than the "wet" method. The autoclave vacuuming process of making dry carbon means fewer pinholes and virtually no air pockets in the carbon. Some customers have even reported better gas mileage and power gains.

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Rein Aluminum Oil Filter Housing - BMW B58

T#:49404665

Part#: 11428583901

In Stock

$ 408.99 USD

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$ 408.99 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.

Rein Water Feed Tube with O-Ring G20 330i, G30 530i, G01 X3 30i ...

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:34181294

Part#: 11538854737

Ships in 4 Business Days

$ 46.99 USD

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$ 46.99 USD

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The Rein Water Feed Tube with O-ring CHT0924 is a premium replacement part designed for BMW vehicles, ensuring optimal engine cooling performance. Manufactured with high-quality materials, this water feed tube guarantees durability and a precise fit, making it an ideal solution for restoring or upgrading your BMW’s cooling system. Available through Turner Motorsport, this part ensures the prevention of coolant leaks and maintains the efficiency of your vehicle’s cooling system.

This water feed tube is engineered to withstand the intense heat and pressure found in high-performance engines, delivering long-lasting reliability. It’s compatible with a variety of BMW models, making it a versatile choice for both professional mechanics and DIY enthusiasts.

Benefits:

Precise fitment: Specifically designed for BMW applications to ensure seamless replacement.
High-quality materials: Built to endure high-temperature and high-pressure environments.
O-ring seal: Ensures a leak-proof connection, preventing coolant loss and engine overheating.
Optimized engine performance: Helps maintain consistent engine temperatures for improved vehicle performance.
Available at Turner Motorsport: Trusted source for BMW parts and accessories.

Keep your BMW running smoothly with the Rein Water Feed Tube with O-ring CHT0924, designed to restore your cooling system’s functionality and keep your engine in peak condition.

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BMS Heat Exchanger Upgrade - G-Chassis B58

T#:5095728

Part#: GCHASB58HEATEXCH

Ships on Aug 5, 2026

$ 480.00 USD

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$ 480.00 USD

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This heat exchanger upgrade is a high-quality replacement that dramatically lowers engine oil and water temperatures by providing a 50% larger cooling surface than OEM. The benefits are most noticed during back to back runs at higher boost levels where the factory cooling capacity can be overwhelmed resulting in ignition timing pull and reduced turbo efficiency. Direct bolt-in installation.

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