BMW Cooling System Parts & Accessories for BMW G01 X3 xDrive30i B46 2.0L

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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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Hose - Radiator-Engine
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:30729024
Part#: 17127535529
In Stock
Sale - Save 20% $ 95.99

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

$ 76.70 USD
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Sale - Save 20%
$ 95.99

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

$ 76.70 USD
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Mishimoto - Corporate Logo
T#:637388
Part#: MMFAN-12C
Ships in 4 Business Days
$ 96.99 USD
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$ 96.99 USD
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BMW Mishimoto 12" Universal Curved Blade Electrical Fan

The BMW Mishimoto 12" Universal Curved Blade Electrical Fan is an ideal upgrade for enhancing cooling efficiency or addressing fitment issues with aftermarket components. Turner Motorsport offers this fan with a slim profile that allows for easy installation flush against the radiator, ensuring optimal performance and space utilization.

Benefits:

  • High-Flow Performance: Delivers 1150 CFM of airflow for superior cooling efficiency.
  • Universal Fitment: Designed to fit a wide range of vehicles and applications.
  • Compact Design: With a diameter of 12" and an overall thickness of just 2.5", it increases engine bay space and allows for flexible installation.
  • Versatile Operation: Easily reversible for use as either a pusher or puller fan.
  • Mishimoto Lifetime Warranty: Backed by Mishimoto's lifetime warranty for peace of mind.
  • Prop 65 Warning: Note that Proposition 65 may apply to this product. For more information, visit www.P65Warnings.ca.gov.
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Genuine BMW Cylinder Head Coolant Hose - BMW G42 G2X G30 G01 G02 G29 ...
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or late...
Genuine BMW - Corporate Logo
T#:620754
Part#: 11538650984
Ships in 1-2 days
5% off MSRP $ 138.99

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

$ 131.99 USD
Free Shipping on orders $49 and up
5% off MSRP
$ 138.99

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

$ 131.99 USD
Free Shipping on orders $49 and up
Over time, rubber hoses and plastic coolant flanges can become brittle due to numerous heat cycles. This often leads to cracks and coolant leaks on the front side of the engine. Additionally, the two o-rings that seal this hose to the cylinder head and the water pump housing can flatten, leading to leaks when reinstalled. When servicing your cooling system, it is advised to replace this hose to prevent leaks and potential overheating.
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Genuine BMW - Corporate Logo
T#:48780791
Part#: 11515A74E79
In Stock
2% off MSRP $ 133.99

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

$ 130.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 133.99

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

$ 130.99 USD
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Genuine BMW replacement coolant flange for back of water pump housing

Spal - Corporate Logo
T#:583649
Part#: 30102048
In Stock at Vendor
$ 207.99 USD
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$ 207.99 USD
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Universal fan that allows increased cooling capacity and shroudless design. 1959 CFM.
Mishimoto - Corporate Logo
T#:1256484
Part#: MMOCULTBK
Ships in 4 Business Days
$ 599.99 USD
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$ 599.99 USD
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Introducing Mishimoto's Universal Oil Cooler (19 row with Thermostat)

In pursuit of optimal engine lubrication, even under ideal driving conditions, is paramount for BMW owners. Elevated oil temperatures can compromise oil pressure and hinder efficient lubrication. Turner Motorsport's new oil cooler offers a solution to maintain cool oil temperatures, ensuring your engine functions at its best. This comprehensive kit includes four feet of stainless braided line, adapter fittings, and an oil filter sandwich adapter.

Key Features:

  • Effective Heat Dissipation: The oil cooler efficiently dissipates heat, keeping oil temperatures within the optimal range for peak engine performance.
  • Comprehensive Kit: This kit includes four feet of stainless braided line, adapter fittings, and an oil filter sandwich adapter, providing everything you need for a seamless installation.
  • Precise Temperature Control: Equipped with a thermostat for fine temperature and flow control, ensuring the ideal oil temperature is maintained.
  • Proposition 65 Compliant: This product complies with Proposition 65, a California law that ensures product safety.

Elevate your BMW's engine performance and protect it from the effects of elevated oil temperatures. Turner Motorsport has the solution you need.

WARNING! Prop 65 may apply to this product.

Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to all companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.

For more information about California Prop 65 warning, see: www.P65Warnings.ca.gov.

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Spal - Corporate Logo
T#:598861
Part#: 30100385
In Stock at Vendor
15% off MSRP $ 130.99

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

$ 111.99 USD
Free Shipping on orders $49 and up
15% off MSRP
$ 130.99

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

$ 111.99 USD
Free Shipping on orders $49 and up
1038 CFM. High performance puller fan with curved blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 15.2in x 14.5in x 2.2in Airflow (CFM): 1038
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Spal - Corporate Logo
T#:25507142
Part#: SPL185TS
Back Ordered
$ 44.99 USD
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This part replaces faulty thermo-switches found in Spal electric fan conversion kits.

Precision Raceworks - Corporate Logo
T#:38128032
Part#: 201-0394-SIL
Ships in 8 Business Days
$ 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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Genuine BMW - Corporate Logo
T#:35863148
Part#: 11518638026KT
Ships in 1-2 days
$ 763.99 USD
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$ 763.99 USD
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The cooling system has always been a weak point for BMW. Two of the biggest issues are the water pump and thermostat. This continues to be true even on the newest B-Series engines found in 2016+ BMWs. This kit includes a brand new Genuine BMW water pump, a new thermostat (now referred to as a Heat Management Module), and 1 gallon of BMW's G48 coolant concentrate (makes 2 gallons of 50/50 coolant). Don't spend thousands of dollars at the dealership, these can easily be replaced in an afternoon with basic mechanic's tools.
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Saleri - Corporate Logo
T#:47439411
Part#: 11517644809
In Stock
$ 201.99

This product was last offered at the strikethrough price on
05-07-2026

$ 195.99 USD
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$ 195.99 USD
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Mishimoto - Corporate Logo
T#:637389
Part#: MMFAN-14C
Ships in 4 Business Days
$ 104.99 USD
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$ 104.99 USD
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This curved blade fan can be used as an upgrade to the OEM fan for more efficient cooling or fitment issues with aftermarket products. With its slim design, the fan can easily be installed flush against a radiator. For universal installation, use Mishimoto universal fan mount kit, T#363171. Features: High-flow curved blade fan provides 1300 CFM of airflow Universal fitment Compact design with a diameter of 14" and an overall thickness of only 2.65" provides increased engine bay space Mishimoto Lifetime Warranty WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Mishimoto - Corporate Logo
T#:19593926
Part#: MMOCULT
In Stock at Vendor
$ 599.99 USD
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Enhance your BMW's performance and protect its engine with this high-quality oil cooler kit

Even under ideal driving conditions, elevated oil temperatures can lead to decreased lubrication efficiency and pressure. With this oil cooler, you can maintain optimal oil temperatures for peak driving performance.

Kit Includes:

  • Four feet of stainless braided line for durability
  • Adapter fittings for easy installation
  • Oil filter sandwich adapter for seamless integration

Specifications:

  • Rows: 19
  • Overall Dimensions: 13" x 5.5" x 2"
  • Core Dimensions: 11.25" x 5.5" x 2"
  • Braided Hoses: 4ft .75 inch & 4ft 9 inch
  • Braided Hose Fittings: -10AN
  • Sandwich Plate Fittings: -10AN
  • Includes Thermostat for precise temperature and flow control

*WARNING: This product may be subject to Proposition 65 regulations in California. For more information, visit www.P65Warnings.ca.gov.

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Genuine BMW Coolant Thermostat Module - BMW G20 G22/23 G30 B48 2.0L ...
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or late...
Genuine BMW - Corporate Logo
T#:617367
Part#: 11538642560
In Stock
9% off MSRP $ 446.99

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

$ 408.99 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 446.99

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

$ 408.99 USD
Free Shipping on orders $49 and up
Modern BMW thermostats are electronically controlled, allowing the DME/ECU to directly regulate coolant flow throughout the engine and its components. This system enables the thermostat to operate based on a broader range of temperature inputs, such as coolant, cylinder head, engine block, and oil temperatures, for more refined control of engine warm-up and temperature across diverse conditions. Unlike traditional thermostats, which simply open or close to permit coolant flow, this system uses a rotary valve for more dynamic control. The rotary valve adjusts to various positions, allowing for partial or full coolant flow to designated passageways as needed. This precision control helps your BMW's engine reach optimal temperatures quickly and ensures efficient heat management under various driving conditions.
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Mishimoto - Corporate Logo
T#:378422
Part#: MMFAN14
In Stock
$ 100.99 USD
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$ 100.99 USD
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WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Spal - Corporate Logo
T#:598801
Part#: 30100375
In Stock
$ 99.99 USD
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$ 99.99 USD
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861 CFM. High performance puller fan with straight blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 13.25in x 12.5in x 2.2in Airflow (CFM): 861
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Bav Auto Angled Hose Pinch Plier Set - 2pc
10X Entries Into Our F80 M3 Sweepstakes
Bav Auto Tools - Corporate Logo
T#:580379
Part#: B8800058
In Stock
Sale - Save 25% $ 32.99

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

$ 24.74 USD
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Sale - Save 25%
$ 32.99

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

$ 24.74 USD
Free Shipping on orders $49 and up
Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.
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Genuine BMW Cooant Pump with Support Housing - BMW G42 G2X G30 G01 G0...
For models with the B48D, B46D, or B46X engines only and without the Energy Recovery Sy...
Genuine BMW - Corporate Logo
T#:606625
Part#: 11518650988
In Stock
9% off MSRP $ 300.99

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

$ 274.99 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 300.99

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

$ 274.99 USD
Free Shipping on orders $49 and up
Mechanical water pumps circulate coolant between the engine block, cylinder head, and radiators. Over time, the seals and bearings can wear out, leading to leaks from the impeller shaft and around the pump face. Some BMW water pumps have even had imellers that come loose from the shaft, resulting in little or no coolant flow. Plastic coolant flanges attached to the housing can become brittle over time, cracking or breaking off completely, leading to coolant loss and overheating. Restore cooling functionality and performance with a brand new pump directly from BMW. This coolant pump assembly includes the pump, the coolant support housing, four of the plastic coolant flanges, and a new water pump pulley.
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Genuine BMW - Corporate Logo
T#:636029
Part#: 11518482250
Ships in 1-2 days
8% off MSRP $ 200.99

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

$ 183.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 200.99

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

$ 183.99 USD
Free Shipping on orders $49 and up
Mishimoto - Corporate Logo
T#:381042
Part#: MMOC-19
In Stock
$ 218.99

This product was last offered at the strikethrough price on
05-06-2026

$ 196.99 USD
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$ 196.99 USD
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WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Spal - Corporate Logo
T#:598818
Part#: 30102113
In Stock at Vendor
$ 257.99 USD
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$ 257.99 USD
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2467 CFM. High performance puller fan with curved blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 16.25in x 15.75in x 3.5in Airflow (CFM): 2467
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Rein Automotive Turbocharger Coolant Pipes CHT0903
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34147743
Part#: 11537643094
Ships in 2 Business Days
$ 61.99 USD
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Turbocharger Coolant Pipes CHT0903 are high-performance components designed to efficiently manage coolant flow in turbocharged engines. Available from Turner Motorsport, these coolant pipes are specifically engineered for BMW vehicles, ensuring optimal cooling of the turbocharger system. By maintaining the right temperature, these pipes help extend the lifespan of your turbocharger while improving engine performance and efficiency.

These Turbocharger Coolant Pipes offer a perfect OEM fit for easy installation, making them ideal for both professionals and BMW enthusiasts. Crafted from durable, heat-resistant materials, they ensure long-lasting reliability and resistance to wear and tear, providing a robust solution for maintaining the performance of your vehicle’s turbocharged engine.

Key Features:

  • Specifically designed for turbocharged BMW engines
  • Perfect OEM fit for seamless installation
  • Efficiently manages coolant flow to the turbocharger
  • Enhances turbocharger performance and engine efficiency
  • Made from durable, heat-resistant materials
  • Available from Turner Motorsport, a trusted provider of high-quality BMW parts

For anyone looking to maintain or upgrade their BMW’s turbocharged engine, these Turbocharger Coolant Pipes are a crucial component that ensures optimal cooling and long-term reliability.

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Mishimoto - Corporate Logo
T#:378412
Part#: MMFAN12BL
Ships in 4 Business Days
$ 106.99 USD
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$ 106.99 USD
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WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Mishimoto - Corporate Logo
T#:378443
Part#: MMFAN12
Ships in 4 Business Days
$ 93.99 USD
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$ 93.99 USD
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WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Gear Wrench - Corporate Logo
T#:387079
Part#: KDT3977
Ships in 2 Business Days
$ 53.99 USD
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This tool is a variation of our popular 3976 Flat Band Hose Clamp Pliers and features 45º jaws with swivel tips to grip at any angle and pliers that latch securely in position.
ATD Tools - Corporate Logo
T#:3657943
Part#: ATD3601
Ships in 2 Business Days
$ 59.99 USD
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Always have extra o-rings
Spal - Corporate Logo
T#:2181323
Part#: FRH
Ships in 4 Business Days
12% off MSRP $ 112.99

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

$ 99.99 USD
Free Shipping
12% off MSRP
$ 112.99

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

$ 99.99 USD
Free Shipping
SPAL® electric fan relay wiring kits are designed to automatically turn on your SPAL® electric fan when the air conditioning is turned on. They can also be used when dual electric fans are installed using one switching device. Features: Makes installation of your new fan a breeze Designed to safely integrate with OEM wiring Feature a waterproof 10/40 amp relay with printed wires for easy installation Harness is designed for 12V systems only Does not included thermo-switch
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OEM Bosch Auxillary Water Pump - F9X G05/06/07 G20/21 G30 G32 G11/12 ...
For models with the later TU (Gen2) & TU2(Gen3) engines
Bosch - Corporate Logo
T#:639196
Part#: 0392023486
In Stock
$ 77.99

This product was last offered at the strikethrough price on
05-07-2026

$ 58.99 USD
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$ 58.99 USD
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Auxillary water pumps are electric water pumps that pump coolant to critical components of your BMW. A failing pump can cause excessive noise and intermittent cooling issues, leading to potential damage if not replaced quickly enough. If the electric motor dies completely, chances are any parts downstream from the pump will overheat and fail, leading to costly repairs and replacements. Prevent this from happening by installing this brand new Auxillary Water Pump from OEM Bosch!
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Coolant Cap Bundle - Silver
For model years up to 2023
Precision Raceworks - Corporate Logo
T#:47679259
Part#: 622-0291-SIL
In Stock
$ 184.99 USD
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$ 184.99 USD
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The Precision Raceworks Billet Coolant Cap Set is a functional and stunningly stylish way to add a nice touch to any engine bay! These caps come in three color options, so there is always a color that will work for you! Black with Billet Silver, Black with Blue, and the Stealth series (all black). Many people don't realize it, but the OEM caps have a pressure release valve built into them. Oftentimes, aftermarket companies don't know this either or just don't care. But our team cares about proper function just as much as we care about the appearance of every product we design. For pressure relief, our caps incorporate the OEM internals, so you get all the functionality of the original caps, ensuring a safe and reliable system in place. These caps offer superior style and performance-grade components that guarantee a reliable fit every time. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come. PLEASE NOTE: These do require assembly and swapping the pressure relief valves from your old caps to your new billet caps.
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Precision Raceworks - Corporate Logo
T#:38161688
Part#: 201-0393-BLK
Ships in 10 Business Days
$ 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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CTA Tools - Corporate Logo
T#:641760
Part#: CTAA878
Ships on Oct 6, 2026
$ 23.57 USD
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Use to remove and install Fan Clutch Assemblies when replacing Water Pumps or doing other Engine Services
BMW B46 B48 Thermostat With Housing And Gasket
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:27372124
Part#: 11537644811
Back Ordered
$ 265.99 USD
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BMW B46 B48 Thermostat With Housing And Gasket is an essential component for maintaining optimal engine performance and cooling efficiency. This high-quality thermostat comes complete with housing and gasket, ensuring a precise fit and reliable operation.

The thermostat plays a crucial role in regulating the flow of coolant based on engine temperature. By controlling this flow, it helps maintain the engine at its optimal operating temperature, preventing overheating and ensuring efficient performance.

  • Complete Assembly: Includes thermostat, housing, and gasket for easy installation.
  • Optimal Cooling: Regulates coolant flow to maintain proper engine temperature.
  • Enhanced Performance: Ensures your engine operates within its ideal temperature range.
  • Durable Construction: Made with high-quality materials for long-lasting reliability.

Ensure your BMW's cooling system is functioning correctly with this reliable thermostat assembly from Turner Motorsport.

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OEM Rein Coolant Expansion Tank Overflow Hose - BMW G01 G02 Gen1 B46/...
For early models with the Gen1 B46/B48 engine - Not for vehicles with the later TU engines
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757470
Part#: 17125A022D6
Back Ordered
$ 35.99 USD
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$ 35.99 USD
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This hose connects the expansion tank to the radiator. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.

Vargas Turbo Technologies - Corporate Logo
T#:7530033
Part#: COOLANTCAPBLK
In Stock
$ 79.99 USD
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$ 79.99 USD
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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit
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Redline - Corporate Logo
T#:3607
Part#: 1-WW-12Z
In Stock
$ 15.99 USD
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Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze. Or it can be added to new or used antifreeze to improve the heat transfer of ethylene and propylene glycol systems. Designed for modern aluminum, cast iron, copper, brass, and bronze systems.

We have been using RedLine Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs.
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Coolant Thermostat Assembly
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or late...
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:50311454
Part#: 11538642560
In Stock
Sale - Save 15% $ 364.99

This product was last offered at the strikethrough price on
09-16-2026

$ 310.24 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 364.99

This product was last offered at the strikethrough price on
09-16-2026

$ 310.24 USD
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Meyle - Water Pump with Gasket
For model years 2018-2019
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:40342902
Part#: 11518638026
In Stock
$ 97.99

This product was last offered at the strikethrough price on
09-16-2026

$ 80.99 USD
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$ 97.99

This product was last offered at the strikethrough price on
09-16-2026

$ 80.99 USD
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Ensure your BMW stays cool and runs efficiently with the trusted performance of the Meyle Water Pump with Gasket 313 220 0031.
Coolant Expansion Tank Cap
10X Entries Into Our F80 M3 Sweepstakes
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
09-17-2026

$ 11.99 USD
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Sale - Save 20%
$ 14.99

This product was last offered at the strikethrough price on
09-17-2026

$ 11.99 USD
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Rein - Corporate Logo
T#:39059266
Part#: 17135A6A030
In Stock
$ 86.99

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

$ 75.99 USD
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$ 86.99

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

$ 75.99 USD
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Coolant expansion tanks can crack over time, especially during services where they need to be removed. Replace your tank with a brand new tank to ensure your cooling system remains leak-free.

Redline - Corporate Logo
T#:394769
Part#: REDLINE5A
In Stock
Starting at $ 15.99 USD
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Starting at $ 15.99 USD
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Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze.
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Spal - Corporate Logo
T#:598797
Part#: 30102029
In Stock
$ 207.99 USD
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$ 207.99 USD
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1328 CFM. High performance puller fan with curved blades. This is a universal fan for applications that require more air flow or for engine compartments that have tight tolerances such as an aftermarket turbo set up that needs more clearance. This fan is universal and you must make it fit your application. It is not a direct bolt on. Made in Italy. Size: 13.25in x 12.5in x 3.5n Airflow (CFM): 1328
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Schwaben Radiator/ Intercooler Fin Comb
10X Entries Into Our F80 M3 Sweepstakes
Schwaben - Corporate Logo
T#:384260
Part#: 015326SCH01A
In Stock
Sale - Save 29% $ 20.99

This product was last offered at the strikethrough price on
05-02-2026

$ 14.99 USD
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Sale - Save 29%
$ 20.99

This product was last offered at the strikethrough price on
05-02-2026

$ 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.

Water/Coolant Pump With Support
For models with the B48D, B46D, or B46X engines only and without the Energy Recovery Sy...
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:49648357
Part#: 11518650988
In Stock
Sale - Save 15% $ 237.99

This product was last offered at the strikethrough price on
09-16-2026

$ 202.29 USD
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Sale - Save 15%
$ 237.99

This product was last offered at the strikethrough price on
09-16-2026

$ 202.29 USD
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90-110mm 3/8"/9mm Band Hose Clamp
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:341281
Part#: 003402ECS06A-13
In Stock
Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD
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Sale - Save 40%
$ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD
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ECS Tuning 304 Stainless Steel Hose Clamps

Once again, ECS Tuning has found a way to make life easier for working on your car. Need new hose clamps but don't want to wait to order it from the dealership or pay more than you should for a hose clamp? That's where we come in! These are full 304 stainless steel hose clamps with various band widths for your convenience. They are German style using T-bolts to adjust in size to your required diameter. Never pay dealer pricing again, but still get the quality you love here at ECS Tuning.

  • Made from high-quality 304 stainless steel for durability
  • German-style design with T-bolts allows for easy size adjustment
  • Various band widths for versatile use
  • Avoid dealership pricing without compromising on quality
  • Perfect for BMW enthusiasts seeking affordable yet reliable hose clamps
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3/8"/9mm Band Hose Clamp - 50-70mm
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:341684
Part#: 003402ECS06A-12
In Stock
Sale - Save 25% $ 6.99

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

$ 5.24 USD
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Sale - Save 25%
$ 6.99

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

$ 5.24 USD
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Elevate your BMW maintenance with ECS Tuning's 304 stainless steel hose clamps, offering convenience and top-quality performance at an affordable price. Designed with various band widths and German-style T-bolts for adjustable sizing, these hose clamps ensure a secure fit for your specific diameter needs. Skip the dealership wait and excessive pricing; ECS Tuning provides reliable, dealership-quality hose clamps without the premium cost, ensuring your car receives the care it deserves.
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Genuine BMW Coolant Hose - Waterp Pump to Thermostat Module - BMW G42...
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or late...
Genuine BMW - Corporate Logo
T#:618269
Part#: 11538650981
In Stock
8% off MSRP $ 109.99

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

$ 100.99 USD
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8% off MSRP
$ 109.99

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

$ 100.99 USD
Free Shipping on orders $49 and up
Over time, rubber hoses and plastic coolant flanges can become brittle due to numerous heat cycles. This often leads to cracks and coolant leaks on the left side of the engine. Additionally, the two o-rings that seal this hose to the water pump flange and the thermostat module housing can flatten, leading to leaks when reinstalled. When servicing your cooling system, it is advised to replace this hose to prevent leaks and potential overheating. This is especially helpful due to its cramped location, requiring the intake manifold to be removed for replacement.
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70-90mm 3/8"/9mm Band Hose Clamp
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:363017
Part#: 003402ECS06A-11
In Stock
Sale - Save 25% $ 6.99

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

$ 5.24 USD
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Sale - Save 25%
$ 6.99

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

$ 5.24 USD
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Upgrade your BMW with ECS Tuning's Stainless Steel Hose Clamps, designed for convenience and durability. With various band widths and German-style T-bolts, these clamps offer easy adjustment to your required diameter. Say goodbye to dealer pricing and enjoy the quality you love at ECS Tuning.

  • Full stainless steel construction
  • Various band widths available
  • German-style T-bolts for easy adjustment
  • Convenient solution for hose clamp replacement
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Genuine BMW - Corporate Logo
T#:6533
Part#: 07129952104
In Stock
$ 3.99 USD
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GENUINE BMW HOSE CLAMP 07129952104


Genuine BMW - Corporate Logo
T#:625198
Part#: 17119797807
Ships in 1-2 days
8% off MSRP $ 614.99

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

$ 562.99 USD
8% off MSRP
$ 614.99

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

$ 562.99 USD

Upgrade your BMW's cooling system with the Genuine BMW Radiator designed for the B46 2.0L engine in G01 and G02 models. Crafted to BMW's exact specifications, this radiator ensures optimal cooling performance and engine temperature regulation.

Key Benefits:

  • Genuine BMW quality for reliability and longevity
  • Specifically designed for B46 2.0L engines in G01 and G02 models
  • Ensures efficient heat dissipation for consistent engine performance
  • Direct fit replacement for seamless installation

Ensure your BMW maintains optimal engine temperature with the Genuine BMW Radiator, offering reliability and peace of mind.

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60-80mm 1/2"/12mm Band Hose Clamp
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:377836
Part#: 003402ECS05A-10
In Stock
Sale - Save 25% $ 6.99

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

$ 5.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 6.99

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

$ 5.24 USD
Free Shipping on orders $49 and up

ECS Tuning Stainless Steel Hose Clamps for BMW

Upgrade your BMW's hose clamps with ECS Tuning Stainless Steel Hose Clamps, designed for convenience and durability. Say goodbye to long waits and overpriced dealership clamps. With various band widths available, these stainless steel clamps ensure a secure fit for your vehicle's hoses.

Benefits:

  • Convenient replacement for worn-out hose clamps
  • Made of durable stainless steel for long-lasting performance
  • Available in various band widths for versatile use
  • Affordable alternative to dealership pricing
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