BMW Cooling System Parts & Accessories for BMW 3 Series F31 (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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Precision Raceworks - Corporate Logo
T#:38128031
Part#: 201-0394-BLK
Ships in 10 Business Days
$ 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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MTC - Corporate Logo
T#:27405534
Part#: 17138617045
Ships in 10 Business Days
$ 64.46 USD
Free Shipping on orders $49 and up
Your charge air cooler's coolant expansion tank acts as a reservoir, housing extra coolant, and gives fluid a place to go after expansion and contraction from temperature change. Because the plastic tank is subjected to regular temperature changes, the plastic can become brittle over time and will often crack or break. If your tank is leaking and you lose too much coolant, your charge air cooler will not function properly and your air intake temperatures will begin to rise, reducing horsepower and efficiency. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.
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Precision Raceworks - Corporate Logo
T#:38128029
Part#: 201-0394-BLU
Ships in 10 Business Days
$ 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#:47679257
Part#: 622-0291-BLAK
Ships in 10 Business Days
$ 184.99 USD
Free Shipping on orders $49 and up
$ 184.99 USD
Free Shipping on orders $49 and up
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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CTA Tools - Corporate Logo
T#:641679
Part#: CTAA195
In Stock
$ 9.98 USD
Free Shipping on orders $49 and up
Tests all ethylene glycol solutions with radiator hot or cold
Burgaflex - Corporate Logo
T#:57725189
Part#: 11538663517
Ships on Nov 12, 2026
New Item
$ 53.99 USD
Free Shipping on orders $49 and up
Keep your turbo charger running cool and performing reliably under demand with this high-quality Burgaflex Turbocharger Coolant Return Line.

Burgaflex - Corporate Logo
T#:57725190
Part#: 17127811129
Ships on Nov 12, 2026
New Item
$ 38.99 USD
Free Shipping on orders $49 and up
This Burgaflex coolant hose delivers standard-setting durability and exact-fit performance to ensure consistent engine temperatures.
Burgaflex - Corporate Logo
T#:57725188
Part#: 11538663516
Ships on Nov 12, 2026
New Item
$ 53.99 USD
Free Shipping on orders $49 and up
The Burgaflex turbo cooling line supply delivers robust, track-ready durability for your forced-induction cooling circuit.

OEM Elring Water Pump Gasket - BMW Gen1 B46/B48 2.0L
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:45483624
Part#: B07.530
In Stock
$ 7.99 USD
Free Shipping on orders $49 and up
$ 7.99 USD
Free Shipping on orders $49 and up
If your water pump has to be removed or is already leaking coolant, it is important to replace the gaskets to prevent coolant loss and overheating.

2 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412932
Part#: 61132359999
In Stock
Sale - Save 25% $ 10.99

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

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

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

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Coolant Hose - Lower
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:48125816
Part#: 17127596838
In Stock
Sale - Save 7% $ 30.99

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

$ 28.79 USD
Free Shipping on orders $49 and up
Sale - Save 7%
$ 30.99

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

$ 28.79 USD
Free Shipping on orders $49 and up

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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Water Pump With Support Bracket
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:58271045
Part#: 11517644809
Ships on Jan 11, 2027
New Item
Sale - Save 10% $ 189.99

This product was last offered at the strikethrough price on
10-08-2026

$ 170.99 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 189.99

This product was last offered at the strikethrough price on
10-08-2026

$ 170.99 USD
Free Shipping on orders $49 and up


Febi - Corporate Logo
T#:55857750
Part#: 17127596837
Special Order: No Guaranteed ETA
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
This febi bilstein upper radiator coolant hose is the ideal preventative maintenance solution for your 2.0L F22, F30, or F32 chassis.
Febi - Corporate Logo
T#:56001956
Part#: 11538635689
Special Order: No Guaranteed ETA
New Item
$ 126.99 USD
Free Shipping on orders $49 and up
This Febi Bilstein thermostat assembly is the perfect solution for maintaining correct cooling system pressures and temperatures on the street or the track.
Febi - Corporate Logo
T#:56001934
Part#: 46221
Special Order: No Guaranteed ETA
New Item
$ 19.99 USD
Free Shipping on orders $49 and up
This Febi Bilstein coolant expansion tank cap is designed to maintain the exact 1.4 bar pressure required to maximize your coolant's boiling point.

Febi - Corporate Logo
T#:56544003
Part#: 17138677649
Special Order: No Guaranteed ETA
New Item
$ 82.99 USD
Free Shipping on orders $49 and up
Prevent catastrophic track-day or daily-driving overheating with this OEM-spec replacement Coolant Expansion Tank by Febi Bilstein.

Febi - Corporate Logo
T#:56507841
Part#: 11518638026
Special Order: No Guaranteed ETA
New Item
$ 121.99 USD
Free Shipping on orders $49 and up
Engineered for ultimate durability, the Febi Bilstein replacement switchable water pump is built to protect your BMW’s B46 or B48 power plant.
Febi - Corporate Logo
T#:56507814
Part#: 17137642160
Special Order: No Guaranteed ETA
New Item
$ 62.99 USD
Free Shipping on orders $49 and up
This Febi Bilstein coolant expansion tank offers OEM quality, engineered to withstand aggressive driving, high thermal loads, and pressurized environments.

Febi - Corporate Logo
T#:56471653
Part#: 17125A05950
Special Order: No Guaranteed ETA
New Item
$ 31.99 USD
Free Shipping on orders $49 and up
This Febi Bilstein Coolant Pipe is built to uphold the cooling demands of your vehicle, whether you're commuting daily or pushing performance on open roads.
Mechanical Water Pump
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:57086679
Part#: 11518638026
Ships on Feb 11, 2027
New Item
Sale - Save 13% $ 119.99

This product was last offered at the strikethrough price on
10-08-2026

$ 104.99 USD
Free Shipping on orders $49 and up
Sale - Save 13%
$ 119.99

This product was last offered at the strikethrough price on
10-08-2026

$ 104.99 USD
Free Shipping on orders $49 and up

Vemo - Corporate Logo
T#:41052829
Part#: 17428641964
Special Order: No Guaranteed ETA
$ 399.00

This product was last offered at the strikethrough price on
05-12-2026

$ 381.99 USD
Free Shipping on orders $49 and up
$ 381.99 USD
Free Shipping on orders $49 and up
The auxiliary fan in your vehicle serves an extremely important role. When your car reaches temperatures that may be hazardous to your engine, the auxiliary fan moves air through the radiator to provide better cooling. Usually activated during times of stationary vehicle operation, it supplements the air usually driven through the radiator by driving down the road. If your vehicle is getting too hot during traffic or at stop lights, your auxiliary fans are probably faulty. Replace yours to restore the factory cooling in your vehicle and prevent catastrophic damage to your engine. Even if your fans are still operational but the blades are damaged or cracked, replacement is the only solution.
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Meyle Thermostat Housing - BMW E84, F10, F22, F26, F30, F31, F32, F33...
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:5704976
Part#: 11538635689
Ships on Nov 11, 2026
$ 72.99 USD
Free Shipping on orders $49 and up
When it comes to your temperature gauge on your instrument cluster your thermostat plays a large role in where that temperature needle ends up. There are many cases where the vehicle will run a bit cool according to that gauge, oftentimes meaning the thermostat has failed and is stuck open allowing coolant to continuously circulate. The other more damaging side is when it closes shut and keeps the engine from cooling down properly. All vehicles are designed to operate in an ideal temperature range for the ultimate efficiency, life, and performance.
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Meyle - Water Pump - N47
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:58453427
Part#: 11518516204
Ships on Jan 19, 2027
New Item
$ 125.99 USD
Free Shipping on orders $49 and up
Meyle - Corporate Logo
T#:40714794
Part#: 17138617045
Ships on Nov 11, 2026
$ 72.99 USD
Free Shipping on orders $49 and up
Keep your turbocharged BMW operating at its best with the Meyle Charge Air Cooler Expansion Tank 314 223 0025.


Meistersatz - Corporate Logo
T#:379621
Part#: 17117639020
Ships in 4 Business Days
$ 17.99 USD
Free Shipping on orders $49 and up
Quality aftermarket coolant expansion tank cap.
URO Parts Expansion Tank - 17138677649
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:29002185
Part#: 17138677649
In Stock
$ 87.99

This product was last offered at the strikethrough price on
10-04-2026

$ 75.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 87.99

This product was last offered at the strikethrough price on
10-04-2026

$ 75.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up

Expansion tanks are susceptible to damage due to constant exposure to high ambient temperatures and chemical degradation. If your expansion tank is cracked, replacing it is crucial to prevent catastrophic engine damage from overheating.

Features:

Guaranteed fitment Precision-molded to OE dimensions for compatibility with original sensors and connections Quality materials resist engine heat and harsh cooling system environments Factory pressure-tested 24-Month Unlimited Mileage Warranty URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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Wagner Tuning - Corporate Logo
T#:1017107
Part#: 400001002
Back Ordered
$ 1,250.00 USD
$ 1,250.00 USD
The 2.0 Liter B48B20 and 3.0 Liter B58B30M0 turbo engine of the specified BMW models is equipped with an indirect charge-air cooling circuit. So the cooling of the charged air is not realized by the ambient air as a cooling medium (as usual), but made with its own cooling water circuit. A reduction of the temperature of the cooling water is directly equated with an improved cooling performance of the charged air. This is exactly where the advantages of the WAGNERTUNING upgrade radiator comes into play. The newly developed competition racing core of the WAGNERTUNING high-performance radiator increase the radiator volume of the OEM water cooler by a total of 117 %. The calculated ratio between the inner and outer cooling surface generates a maximum heat transfer and allows at the same time enough airflow for the surrounding components (for example the engine radiator) for its own heat exchange. Furthermore, using an increased amount of cooling water, the entire system thermics can be kept at a lower level over a longer period of time. All WAGNERTUNING radiators are equipped with a heat-conductive anti-corrosion coating to ensure a lasting cooling effect. The plug & play installation of the system is simple and easy to perform (an installation instruction is included as well). Dimensions OEM radiator: 576 mm x 495 mm x 27 mm V = 7,70 Liter A = 2851 cm² Dimensions WT radiator: 524 mm x 468 mm x 68 mm V = 16,70 Liter A = 2454 cm²
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