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BMW Cooling System Parts & Accessories for BMW G82 M4 S58 3.0L

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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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Red Line Water Wetter Coolant Additive

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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40-60mm 3/8"/9mm Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

T#:341280

Part#: 003402ECS06A-08

In Stock

Sale - Save 25% $ 3.99

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

$ 2.99 USD

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$ 3.99

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

$ 2.99 USD

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ECS Tuning 304 Stainless Steel Hose Clamps

Revolutionize your car maintenance with ECS Tuning's premium 304 stainless steel hose clamps. Eliminate dealership delays and inflated prices! These German-style clamps utilize T-bolts for hassle-free diameter adjustment. With various band widths available, these durable clamps ensure reliability without the hefty cost. Experience dealership-quality products at affordable rates, exclusively at ECS Tuning.

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60-80mm 1/2"/12mm Band Hose Clamp

10X Entries Into Our F80 M3 Sweepstakes

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

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$ 6.99

This product was last offered at the strikethrough price on
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$ 5.24 USD

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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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Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:36947227

Part#: 17138093924

Ships in 1 Business Day

$ 116.99

This product was last offered at the strikethrough price on
08-31-2026

$ 99.99 USD

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$ 99.99 USD

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The coolant expansion tank in your vehicle provides a reservoir for excess fluid as it expands and contracts due to temperature changes. However, frequent exposure to these extreme fluctuations can cause the tank to crack or break over time. To maintain proper coolant levels within the cooling system, any damage to the tank—such as cracks, broken fittings, or damaged mounting points—requires immediate replacement.

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Mishimoto Performance Heat Exchanger - Manual Transmission - BMW G8X ...

T#:21209833

Part#: MMHE-G80-21MT

Ships in 2 Business Days

$ 810.99 USD

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$ 810.99 USD

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Introducing the Mishimoto 2021+ BMW G8X M3/M4 performance heat exchanger, the ultimate solution to keep your charge air cool under the most demanding conditions. In the world of forced induction vehicles, air-to-water intercooling is the future, and Mishimoto are taking it to the next level. We started from scratch, leaving no room for compromise. Our design eliminates all plastic components, replacing them with durable aluminum end tanks, core, and CNC-machined ports. TIG-welded for maximum strength and longevity, this heat exchanger will withstand even the harshest conditions. We took it further by incorporating strutted tubes within the core, adding unparalleled resistance against bowing and flexing during aggressive cornering. But strength is not our only focus. We've increased the core volume by 23 percent and expanded the external fin surface area by 44 percent. Combined with our dual-pass flow configuration and louvered fin design, this performance heat exchanger vastly improves cooling capacity over stock, enhancing overall performance. Rest assured, the Mishimoto Performance Heat Exchanger for the 2021+ BMW G8X M3/M4 is designed to fit perfectly with all other factory components, ensuring seamless integration into your vehicle. For added protection, we include steel rock guards to shield the heat exchanger from debris and prevent punctured tubes or crushed fins. The Mishimoto G8X M3/M4 performance heat exchanger fits both automatic and manual transmissions. The Mishimoto 2021+ BMW G8X M3/M4 performance heat exchanger comes with our renowned Mishimoto Lifetime Warranty, giving you peace of mind and confidence in your investment. Upgrade your BMW G8X M3/M4 with the Mishimoto Heat Exchanger and experience the true power of cooling efficiency. Features: Direct fit for the 2021+ BMW G8X M3/M4 23 percent increase in core volume improves cooling capacity 44 percent increase in external fin surface area for greater heat transfer Dual-pass design for maximum cooling Strutted tubes incorporated in core for maximum durability CNC-machined inlet and outlet for leak-free running Includes removable steel rock guards for additional durability Mishimoto Lifetime Warranty Includes: (1) Performance Aluminum Heat Exchanger (1) Upper Rock Guard (1) Lower Rock Guard (MT Only) (1) Hardware Pack Mishimoto Lifetime Warranty

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Fan mounting pin - priced each

T#:598910

Part#: 30130013

In Stock at Vendor

$ 6.99 USD

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$ 6.99 USD

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Wire pin used to mount electric fan directly to radiator.

16" Fan shroud gasket

T#:598825

Part#: 30130074

In Stock at Vendor

$ 17.99 USD

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$ 17.99 USD

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Provides .25" stand off from radiator, does not work with high output fans.

Hose Clamp 2 5/16" - 3 1/4" - priced each

10X Entries Into Our F80 M3 Sweepstakes

T#:376806

Part#: 54155K23

Ships in 1 day

$ 4.99 USD

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$ 4.99 USD

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Hose Clamp 2 5/16" - 3 1/4"

Ensure secure hose connections with the Hose Clamp 2 5/16" - 3 1/4", a versatile and reliable solution for various applications. Crafted from durable materials, this clamp offers superior strength and corrosion resistance. Its adjustable design allows for a snug fit, reducing the risk of leaks and ensuring optimal performance. Upgrade your hose connections with the precision and reliability of the Hose Clamp 2 5/16" - 3 1/4".

Versatile and reliable solution for various applications
Superior strength and corrosion resistance
Adjustable design for a snug fit
Reduces risk of leaks for optimal performance

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O-RING

T#:580584

Part#: C32348

Ships in 1-3 days

$ 3.99

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

$ 2.99 USD

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$ 2.99 USD

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BMW Blue Auxiliary Coolant Reservoir Cap

T#:38128029

Part#: 201-0394-BLU

Ships in 9 Business Days

$ 94.99 USD

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$ 94.99 USD

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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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BMW Black Auxiliary Coolant Reservoir Cap

T#:38128031

Part#: 201-0394-BLK

Ships in 9 Business Days

$ 94.99 USD

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$ 94.99 USD

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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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Precision Raceworks Coolant Cap Bundle - Black - Most BMWs from 2016 ...

For model years up to 2023

T#:47679257

Part#: 622-0291-BLAK

Ships in 9 Business Days

$ 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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Anti-Freeze Tester

T#:641679

Part#: CTAA195

In Stock

$ 9.98 USD

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$ 9.98 USD

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Tests all ethylene glycol solutions with radiator hot or cold

Thermostat - 105C

10X Entries Into Our F80 M3 Sweepstakes

T#:15511827

Part#: 11537502779

Ships on Oct 20, 2026

Sale - Save 3% $ 46.99

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

$ 45.58 USD

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Sale - Save 3%

$ 46.99

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

$ 45.58 USD

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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.

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2 Pin Connector

10X Entries Into Our F80 M3 Sweepstakes

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

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Sale - Save 25%

$ 10.99

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

$ 8.24 USD

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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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Thermostat With Housing & Gasket

T#:56544033

Part#: 11537586885

Special Order: No Guaranteed ETA

$ 68.99 USD

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$ 68.99 USD

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This Febi Bilstein electronic coolant thermostat assembly delivers factory-level thermal control to keep coolant temperatures stable across varying engine loads.

Meyle Expansion tank cap - E70, E71, F01, F02, F10, G80, G82 ...

5X Entries Into Our F80 M3 Sweepstakes

T#:40714795

Part#: 3142380005

Ships on Oct 13, 2026

$ 9.99 USD

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$ 9.99 USD

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Ensure your BMW's cooling system stays sealed and protected with this dependable Meyle expansion tank cap.

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