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Mishimoto BMW Cooling System Parts & Accessories

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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Mishimoto - Corporate Logo
T#:27938415
Part#: MMFSE4699
In Stock at Vendor
9% off MSRP $ 374.00

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

$ 339.95 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 374.00

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

$ 339.95 USD
Free Shipping on orders $49 and up
Mishimoto - Corporate Logo
T#:385000
Part#: MMHOSEE46NONMBK
In Stock at Vendor
9% off MSRP $ 220.00

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

$ 199.99 USD
Free Shipping
9% off MSRP
$ 220.00

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

$ 199.99 USD
Free Shipping

These high quality silicone hoses feature stock-type quick-disconnect fittings - no need to cut up your old hoses to get the connectors off! Unlike factory rubber hoses, silicone can withstand higher temperatures and pressures with minmal wear. Rubber will wear out and weaken so don't let it bite you when it counts! Silicone has been proven during extreme racing conditions and won't be the weak link that ruins your day.

The pre-attached stock-style plastic quick-disconnect fittings include new O-rings, providing a reliable leak-free seal during installation. We do not recommend re-using the temp sensor located in the lower radiator hose. You can add a new one to your order from the options below.

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Mishimoto - Corporate Logo
T#:3443019
Part#: MMFS-E46-99K
Ships in 3 Business Days
$ 420.99 USD
Free Shipping
$ 420.99 USD
Free Shipping
Features Direct fit for the 1999–2006 BMW E46 non-M Vehicles Up to 22°F ( 12.2°C) reduction in outlet temperatures at idle compared to the stock electric fan when tested on an E46 manual transmission vehicle Includes a 16" high-flow electric fan that provides over 1850 cfm of airflow Includes NPT fan controller provides complete control of coolant temperatures at idle Fits with both stock and Mishimoto E46 Aluminum Radiator radiators Replaces failure-prone stock mechanical fan on automatic vehicles Black powdercoated finish Includes all mounting hardware for installation 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#:378423
Part#: MMRADCON99X
In Stock at Vendor
$ 457.99

This product was last offered at the strikethrough price on
09-18-2026

$ 457.95 USD
$ 457.95 USD
As an ideal upgrade to the stock BMW radiator, the Mishimoto BMW Z3 X-Line aluminum radiator will give your BMW a cooler engine that runs more efficiently, boost engine functions and prevent your car from overheating. All Mishimoto X-Line performance radiators are made with durable aircraft quality aluminum and feature polished end tanks. As with all our aluminum radiators, this BMW Z3 radiator includes the Mishimoto Lifetime Warranty. 2-row core for improved strength and reliability. 92% thicker than stock for increased cooling capacity and efficiency. Greater density of rows for higher cooling capacity. More contact points for additional heat transfer. Includes magnetic drain plug 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#:16574450
Part#: MMHOSETINY01BK
In Stock at Vendor
$ 217.99 USD
Free Shipping on orders $49 and up

Upgrade your Mini Cooper S radiator hoses with Mishimoto's high-quality silicone replacement kit. Made from a blend of premium silicone and heat-resistant embedded fibers, these hoses offer superior durability and performance compared to OEM rubber hoses. Choose from black, blue, or red options to match your Mini's style while retaining OEM fitment. Plus, Mishimoto's no-questions-asked warranty policy ensures coverage, even for vehicles involved in accidents. With Mishimoto radiator hoses, you're getting the ultimate combination of performance, style, and peace of mind.

  • High-grade silicone construction for superior durability
  • Increased pressure tolerance for enhanced performance
  • Available in black, blue, or red for personalized style
  • Mishimoto's no-questions-asked warranty policy provides coverage for accident damage

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#:378511
Part#: MMRADE4601
Ships in 3 Business Days
$ 721.99 USD
$ 721.99 USD
Mishimoto radiators address all of the defects of the stock E46 radiator in a well-engineered and price-competitive direct replacement unit. The Mishimoto radiator is an all aluminum design that replaces the factory plastic and aluminum stock radiator. The stock plastic end tanks are notorious for cracking and leaks whereas the Mishimoto has aluminum end tanks that will never fail. Mishimoto can also build 30% more coolant capacity into the a radiator that fits in the original location with no modifications. More coolant volume means the fluid is not heat soaked for as long (less super heated fluid circulating through the engine). For a direct replacement performance radiator, the Mishimoto is hard to beat!
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Mishimoto - Corporate Logo
T#:378443
Part#: MMFAN12
In Stock at Vendor
$ 93.99 USD
Free Shipping
$ 93.99 USD
Free Shipping
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#:378416
Part#: MMHOSEE4699RD
In Stock at Vendor
$ 121.99 USD
Free Shipping
$ 121.99 USD
Free Shipping
Mishimoto BMW E46 silicone radiator hose kits are made with a dual-layer combining high-grade silicone and heat-resistant embedded fibers to provide efficient heat reduction and increased pressure tolerance, all with an OEM replacement fit. Perfect for your BMW. Direct fit for 2001–2006 BMW E46 M3 Max temperature of 330°F Made of high-grade silicone and heat-resistant embedded fibers Efficiently reduces heat Increases pressure tolerance OEM replacement fit Available in black, blue, or red 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#:378891
Part#: MMFSE4601
In Stock at Vendor
$ 373.99 USD
$ 373.99 USD
This electric fan for the E46 M3 takes the place of the stock engine-mounted fan and offers several advantages - more horsepower by removing parasitic drag customizable temp control (with optional fan controller - not included in this kit) frame included for a direct fit more reliable than a stock-style fan clutch The stock engine fan is mounted on the water pump shaft and spins with the engine. Torque from the engine is used to spin the fan, which could otherwise be used to power the car. It's not a lot of lost power and torque - Mishimoto measured a max gain of 5whp - but sometimes every little bit helps. And the other advantages of an electric fan make it a smart move. The Mishimoto electric fan uses a 16" slim profile electric fan that flows at 1,850 cubic feet per minute (CFM). The shroud and frame are black powedercoated steel and mounts to existing points on the radiator for a seamless install. Mishimoto has confirmed fitment with stock radiators as well as their own Performance and X-Line aluminum radiators. Hardware and instructions are included. An electric fan must be powered by a 12v source. A fan controller kit is optional and is activated by coolant temp. This is the preferred setup method but other types of controls may also be used. Looking for a kit that includes the fan controller and temp sensors? See T#637722
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Mishimoto - Corporate Logo
T#:378412
Part#: MMFAN12BL
In Stock at Vendor
$ 106.99 USD
Free Shipping
$ 106.99 USD
Free Shipping
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#:23416485
Part#: MMRADTINY01
In Stock at Vendor
$ 457.99

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

$ 457.95 USD
$ 457.95 USD

When seeking a radiator for enhanced performance or street use, opt for the most efficient cooling available. The Mishimoto aluminum radiators stand as an exceptional upgrade from stock cooling systems. Delivering up to 30% more cooling capacity than a new stock radiator, this radiator ensures optimal cooling whether on the track or street.

This radiator boasts a direct-fit design and features an aluminum neck welded to each corner for durability and precise fitment. Additionally, Mishimoto offers comprehensive coverage under its no-questions-asked warranty policy. In the event of fender bender damage, Mishimoto provides warranty coverage, inclusive of vehicles involved in accidents. Warranty claims necessitate accident pictures, an official police report, and must be made within three months of the accident.

  • Up to 30% more cooling capacity than stock radiators
  • Direct fit with aluminum neck welded to each corner
  • Mishimoto's no questions asked warranty policy for accident-related damages

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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Mishimoto - Corporate Logo
T#:363171
Part#: MMFANMOUNT
In Stock
$ 15.99 USD
Free Shipping on orders $49 and up
The Mishimoto universal fan mount kit is used to mount a Mishimoto electric fan to any Mishimoto aluminum radiator. Great for custom applications, the Mishimoto fan can be mounted in any convenient position on the radiator. Universal fan mount fits any Mishimoto electric fan Ideal for custom applications Mounts fan in any convenient position Mishimoto Lifetime Warranty
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Mishimoto - Corporate Logo
T#:51039991
Part#: MMB-E46-002
Ships in 3 Business Days
$ 1,127.99 USD
$ 1,127.99 USD
Don’t let a plastic cooling system stand between you and the road.
Mishimoto - Corporate Logo
T#:51075080
Part#: MMOCF-F80
Ships in 3 Business Days
$ 100.99 USD
Free Shipping on orders $49 and up
The Mishimoto S55 Oil Line Fitting is a robust upgrade designed for the rigorous demands of competitive racing.
Mishimoto - Corporate Logo
T#:21209833
Part#: MMHE-G80-21MT
In Stock at Vendor
$ 810.99 USD
Free Shipping on orders $49 and up
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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Mishimoto - Corporate Logo
T#:638024
Part#: MMRAD-SUP-20A
In Stock at Vendor
$ 610.99 USD
Free Shipping
$ 610.99 USD
Free Shipping
Dramatically increase the cooling performance of your Supra with Mishimoto's new Performance Aluminum Radiator. Key Features: All aluminum construction More durable and longer-lasting than plastic components 30% more capacity in the same space 180% Increase to external fin surface area Excellent fit and finish Unbeatable lifetime warranty and accident-forgiveness Mishimoto radiators address all of the defects and deficiencies of the stock Supra auxiliary radiators in a well-engineered and price-competitive direct replacement pair. Mishimoto's radiators feature an all-aluminum design that replaces the factory plastic and aluminum stock radiators. BMW style plastic end tanks are notorious for cracking and leaks, whereas the Mishimoto has aluminum end tanks that will never fail. Mishimoto also allows a 30% increase in coolant capacity into the radiator that fits in the original location with no modifications. More coolant volume means the fluid is not heat soaked for as long (less superheated fluid circulating through the engine). For a direct replacement performance radiator, the Mishimoto is hard to beat! Mishimoto was established in 2003 as a supplier of cooling components for drift and rally cars. Their radiators and intercoolers soon found a strong following in the hyper-competitive drift scene where high horsepower and prolonged high revs dictate the need for durable and robust cooling solutions. The catchy Mishimoto name is a combination of the name of the founder's family pet - Mishi - and "moto". All products are designed and tested in the USA using state-of-the-art CAD tools and prototyping and with the continuous evolution of product design. Mishimoto is so dedicated to quality that they offer a limited lifetime warranty and accident forgiveness. 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#:27938433
Part#: MMHOSETINY01RD
In Stock
$ 217.99 USD
Free Shipping on orders $49 and up

Upgrade your Mini's engine with the MINI R52 R53 Silicone Hose Kit in Red. This kit offers durability and performance, making it an ideal choice for enthusiasts.

  • High-quality silicone construction for durability and heat resistance
  • Resistant to oil, fuel, and coolant for long-lasting performance
  • Improves airflow and reduces the risk of hose collapse under high pressure
  • Enhances the appearance of the engine bay with a vibrant red color
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Mishimoto - Corporate Logo
T#:392693
Part#: MMRADE3692KT
In Stock
$ 383.99 USD
Free Shipping
$ 383.99 USD
Free Shipping
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#:51075075
Part#: MMTS-F80-15
Ships in 3 Business Days
$ 139.99 USD
Free Shipping on orders $49 and up
The Mishimoto S55 Racing Thermostat provides superior thermal control compared to standard equipment.
Mishimoto - Corporate Logo
T#:378434
Part#: MMFAN10
In Stock at Vendor
$ 88.99 USD
Free Shipping
$ 88.99 USD
Free Shipping
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#:57376626
Part#: MMRAD-F80-15A
In Stock at Vendor
New Item
$ 494.00 USD
$ 494.00 USD
High coolant temperatures and thermal degradation are the enemies of sustained lap times on the S55 powered BMW F8X M3 and M4. Mounted low in the front bumper fascia, the factory auxiliary cooling units quickly heat soak under circuit conditions
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Mishimoto - Corporate Logo
T#:597379
Part#: R2285-MT
Back Ordered
$ 256.99 USD
$ 256.99 USD
This 1999-2001 BMW 740i/iL 4.4L V8 radiator is a direct OEM replacement for your old stock unit. There is no need to bend, cut, or modify anything to ensure a proper fitment in your vehicle. This radiator features OEM spec plastic end tanks attached to an aluminum core for stock cooling efficiency. At some point the inevitable happens to original stock radiators. They either spring a leak, get clogged up, or a plastic inlet or outlet cracks due to years of constant clamp pressure. This BMW 740i/iL radiator is a perfect replacement to keep your cooling system in top-notch shape, and just like all Mishimoto parts, it comes with the 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. 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#:597382
Part#: R1841-AT
Back Ordered
$ 143.99 USD
$ 143.99 USD
This 1988-1998 BMW 3 Series radiator is a direct OEM replacement for your old stock unit. There is no need to bend, cut, or modify anything to ensure proper fitment in your vehicle. This radiator features OEM spec plastic end tanks attached to an aluminum core for stock cooling efficiency. At some point the inevitable happens to original stock radiators. They either spring a leak, get clogged up, or a plastic inlet or outlet cracks due to years of constant clamp pressure. This 1988-1999 BMW 3Series radiator is a perfect replacement to keep your cooling system in top-notch shape, and just like all Mishimoto parts, it comes with the 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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