BMW Cooling System Parts & Accessories for BMW 5 Series G30 (2017+)

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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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Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
In Stock
Sale - Save 3% $ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
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$ 3.99

This product was last offered at the strikethrough price on
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Starting at $ 3.87 USD
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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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Bremmen Parts - Corporate Logo
T#:26538308
Part#: 11537642854
In Stock
Sale - Save 5% $ 308.99

This product was last offered at the strikethrough price on
05-03-2026

$ 292.63 USD
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$ 308.99

This product was last offered at the strikethrough price on
05-03-2026

$ 292.63 USD
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Thermostat - B48
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
In Stock
Sale - Save 15% $ 223.99

This product was last offered at the strikethrough price on
05-03-2026

$ 190.39 USD
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Sale - Save 15%
$ 223.99

This product was last offered at the strikethrough price on
05-03-2026

$ 190.39 USD
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Bremmen Parts - Corporate Logo
T#:27205374
Part#: 11118511205
In Stock
Sale - Save 20% $ 42.99

This product was last offered at the strikethrough price on
05-03-2026

$ 34.39 USD
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$ 42.99

This product was last offered at the strikethrough price on
05-03-2026

$ 34.39 USD
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Bremmen Parts - Corporate Logo
T#:36981057
Part#: 11538611277
Ships on Aug 11, 2026
Sale - Save 18% $ 60.99

This product was last offered at the strikethrough price on
05-03-2026

$ 49.99 USD
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$ 60.99

This product was last offered at the strikethrough price on
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$ 49.99 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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Bremmen Parts - Corporate Logo
T#:36913371
Part#: 11118619408
In Stock
Sale - Save 21% $ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 26.10 USD
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$ 32.99

This product was last offered at the strikethrough price on
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$ 26.10 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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Bremmen Parts - Corporate Logo
T#:36913362
Part#: 11538606278
In Stock
Sale - Save 21% $ 54.99

This product was last offered at the strikethrough price on
05-03-2026

$ 43.24 USD
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Sale - Save 21%
$ 54.99

This product was last offered at the strikethrough price on
05-03-2026

$ 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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Precision Raceworks - Corporate Logo
T#:38161689
Part#: 201-0393-BLU
In Stock
$ 115.99

This product was last offered at the strikethrough price on
01-22-2026

$ 109.99 USD
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$ 109.99 USD
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BMW Blue Engine Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the performance and appearance of their engine bay. Constructed from high-quality billet aluminum, this cap replaces the flimsy plastic factory cap, offering improved durability and a sleek, high-performance aesthetic.

Designed with precision, this coolant reservoir cap incorporates the OEM pressure relief function to maintain proper cooling system operation. Unlike inferior stick-on covers that may loosen over time, this cap is a complete replacement, ensuring a secure, leak-free fit. The blue anodized finish provides superior corrosion resistance, making it a reliable upgrade for daily drivers and track enthusiasts alike.

  • OEM pressure relief function – Ensures proper cooling system performance and safety
  • Billet aluminum construction – Provides enhanced durability and strength over factory plastic caps
  • Direct-fit replacement – Fully replaces the stock cap for a precise, secure fit
  • Blue anodized finish – Resists corrosion, heat, and wear for long-lasting performance
  • Motorsport-inspired design – Adds a sleek, professional look to the engine bay
  • Built for longevity – Engineered to withstand extreme temperatures and coolant exposure

Upgrade your BMW’s cooling system with the BMW Blue Engine Coolant Reservoir Cap, designed for superior reliability and style.

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VTT Billet/Silicone Cylinder Head Cooling Hose - B58TU
For vehicles with a production date from 07/18
Vargas Turbo Technologies - Corporate Logo
T#:29334026
Part#: VTT-B58TU-UCH
Ships in 10 Business Days
Starting at $ 209.99 USD
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Starting at $ 209.99 USD
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Positioned directly in the charge pipe's path, the stock B58TU upper cylinder head cooling hose, primarily made of plastic, is prone to damage. A dislodged charge pipe can easily take out this cooling hose, leading to severe engine damage through rapid coolant loss and overheating.

To address this vulnerability, VTT has engineered a robust solution. By replacing the OEM rubber hose with a durable 7-ply silicone variant, they offer superior resilience and longevity. Furthermore, they've upgraded the factory plastic flanges to 6061-T6 billet aluminum with black anodizing, enhancing corrosion resistance.

This upgraded hose is the ultimate solution, providing protection against dislodged charge pipes and the heat generated from spirited driving or track use.

Key Features:

Direct factory replacement for easy installation 6061-T6 billet aluminum with black anodizing for improved corrosion resistance Durable 7-ply silicone available in three colors Upgrade your BMW B58TU engine with this enhanced cooling hose from Vargas Turbo Technologies for superior performance and reliability.

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Precision Raceworks - Corporate Logo
T#:38128032
Part#: 201-0394-SIL
Ships in 7 Business Days
$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD
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$ 94.99 USD
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BMW Silver Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

  • OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
  • Premium billet aluminum construction – Offers enhanced durability and longevity
  • Direct replacement design – Secure fit without adhesives or modifications
  • Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
  • Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
  • Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Silver Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

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Ina - Corporate Logo
T#:36201645
Part#: 11538642559
In Stock
$ 367.99

This product was last offered at the strikethrough price on
07-21-2026

$ 356.99 USD
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$ 356.99 USD
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Engineered specifically for BMW models, the electronic thermostat and coolant distribution module plays a vital role in the engine’s cooling system, adapting to changing temperatures for superior performance under all driving conditions. Whether on the track or the highway, this module ensures your BMW runs cooler, longer, and more efficiently.
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Precision Raceworks - Corporate Logo
T#:38161688
Part#: 201-0393-BLK
Ships in 9 Business Days
$ 115.99

This product was last offered at the strikethrough price on
01-22-2026

$ 109.99 USD
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$ 109.99 USD
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BMW Black Engine Coolant Reservoir Cap is a premium upgrade designed to enhance both the functionality and aesthetics of your BMW’s engine bay. Unlike flimsy plastic OEM caps, this high-performance cap is CNC-machined from durable billet aluminum, providing long-lasting strength and a sleek, motorsport-inspired look.

Built with precision, this cap retains the essential OEM pressure release function, ensuring proper cooling system operation without compromise. Unlike inferior adhesive covers that may detach over time, this cap fully replaces the factory component, delivering a secure and reliable fit. With a corrosion-resistant black anodized finish, it withstands extreme temperatures and harsh conditions while elevating your BMW’s under-hood appearance.

  • OEM pressure regulation – Maintains factory-designed pressure release for optimal cooling performance
  • CNC-machined billet aluminum – Provides exceptional durability and long-term reliability
  • Direct replacement – Fully replaces the stock cap, ensuring a perfect fit without modifications
  • Corrosion-resistant anodized finish – Prevents wear and adds a stealthy, high-performance look
  • Heat and fluid-resistant design – Built to withstand extreme temperatures and coolant exposure
  • Enhanced engine bay styling – Offers a sleek, motorsport-inspired upgrade

Upgrade your BMW’s cooling system with the BMW Black Engine Coolant Reservoir Cap, designed for superior performance and long-lasting durability.

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Bremmen Parts - Corporate Logo
T#:36032339
Part#: 17117639020
In Stock
Sale - Save 20% $ 14.99

This product was last offered at the strikethrough price on
05-03-2026

$ 11.99 USD
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Sale - Save 20%
$ 14.99

This product was last offered at the strikethrough price on
05-03-2026

$ 11.99 USD
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Electronic Thermostat And Coolant Distribution Module
For vehicles with the later B58C or B58D engine - Will not fit the B58A early engine
Bremmen Parts - Corporate Logo
T#:50311455
Part#: 11538843406
In Stock
New Item
Sale - Save 10% $ 397.99

This product was last offered at the strikethrough price on
05-03-2026

$ 358.01 USD
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Sale - Save 10%
$ 397.99

This product was last offered at the strikethrough price on
05-03-2026

$ 358.01 USD
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Water/Coolant Pump With Support
For models with the B48D, B46D, or B46X engines only and without the Energy Recovery Sy...
Bremmen Parts - Corporate Logo
T#:49648357
Part#: 11518650988
In Stock
New Item
Sale - Save 17% $ 234.99

This product was last offered at the strikethrough price on
05-03-2026

$ 195.99 USD
Limited Qty Sale
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Sale - Save 17%
$ 234.99

This product was last offered at the strikethrough price on
05-03-2026

$ 195.99 USD
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Precision Raceworks - Corporate Logo
T#:38161691
Part#: 201-0393-SIL
Ships in 8 Business Days
$ 115.99

This product was last offered at the strikethrough price on
01-22-2026

$ 109.99 USD
Free Shipping on orders $49 and up
$ 109.99 USD
Free Shipping on orders $49 and up

BMW Silver Engine Coolant Reservoir Cap is a premium upgrade for BMW owners looking to enhance both the performance and appearance of their engine bay. Crafted from high-strength billet aluminum, this cap replaces the factory plastic version, offering superior durability and a refined, professional look.

Designed with functionality in mind, it integrates the OEM pressure relief system to ensure your engine's cooling system remains safe and efficient. Unlike adhesive covers, which can peel or wear over time, this cap is a direct-fit replacement, providing a secure and leak-proof seal. The silver anodized finish not only enhances the visual appeal but also ensures resistance to corrosion, high temperatures, and wear, making it perfect for daily driving and track use.

  • OEM pressure relief integration – Maintains proper cooling system performance and reliability
  • Durable billet aluminum – Outperforms factory plastic caps in longevity and strength
  • Precision-machined for perfect fitment – Replaces the stock cap securely, not just a cover
  • Anodized silver finish – Offers corrosion, heat, and wear resistance
  • Elevates engine bay aesthetics – Adds a clean, professional appearance
  • Built for both street and track use – Designed to withstand extreme conditions

Enhance your BMW’s cooling system with the BMW Silver Engine Coolant Reservoir Cap, providing both style and functionality for years to come.

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Precision Raceworks - Corporate Logo
T#:38128029
Part#: 201-0394-BLU
Ships in 9 Business Days
$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD
Free Shipping on orders $49 and up
$ 94.99 USD
Free Shipping on orders $49 and up

BMW Blue Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

  • OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
  • Premium billet aluminum construction – Offers enhanced durability and longevity
  • Direct replacement design – Secure fit without adhesives or modifications
  • Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
  • Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
  • Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Blue Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

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Precision Raceworks - Corporate Logo
T#:38128031
Part#: 201-0394-BLK
Ships in 9 Business Days
$ 99.99

This product was last offered at the strikethrough price on
01-22-2026

$ 94.99 USD
Free Shipping on orders $49 and up
$ 94.99 USD
Free Shipping on orders $49 and up

BMW Black Auxiliary Coolant Reservoir Cap is the perfect upgrade for BMW owners looking to enhance both the aesthetics and functionality of their engine bay. Unlike generic aftermarket caps that overlook critical pressure regulation, this precision-engineered cap retains the OEM pressure release functionality, ensuring safe and reliable coolant system performance.

Crafted from high-quality billet aluminum, this reservoir cap offers superior durability and resistance to heat and fluids, preventing warping or degradation over time. Unlike adhesive-based cap covers that can loosen or fall off, this cap is a direct replacement for the factory component, providing a secure, high-performance solution.

  • OEM pressure release functionality – Maintains proper system regulation for optimal coolant performance
  • Premium billet aluminum construction – Offers enhanced durability and longevity
  • Direct replacement design – Secure fit without adhesives or modifications
  • Resistant to heat and fluids – Ensures long-lasting reliability in extreme conditions
  • Performance-inspired look – Adds a sleek, high-end appearance to your engine bay
  • Upgraded durability – Prevents cracking, leaks, and premature wear

Upgrade your BMW’s cooling system with the BMW Black Auxiliary Coolant Reservoir Cap, blending performance, reliability, and premium styling.

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Bremmen Parts - Corporate Logo
T#:39295552
Part#: 17127576363
Special Order: No Guaranteed ETA
Sale - Save 21% $ 27.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.02 USD
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Sale - Save 21%
$ 27.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.02 USD
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