BMW Cooling System Parts & Accessories for BMW 3 Series E46 (1999-2005)

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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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URO Premium Aluminum Water Pipe - BMW M52TU M54
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URO Premium - Corporate Logo
T#:587659
Part#: 11537502525PRM
In Stock
$ 71.99 USD
Free Shipping
$ 71.99 USD
Free Shipping
This plastic coolant water pipe connects the expansion tank return hose with the engine block
Genuine BMW - Corporate Logo
T#:14120
Part#: 64218363198
In Stock
Sale - Save 21% $ 45.99

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

$ 36.50 USD
Free Shipping on orders $49 and up
Sale - Save 21%
$ 45.99

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

$ 36.50 USD
Free Shipping on orders $49 and up


BMW Hose F Water Valve And Radiator -
This item fits the following BMW Chassis:
E46

Genuine BMW - Corporate Logo
T#:4472
Part#: 11511436590
In Stock
Sale - Save 7% $ 73.99

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

$ 68.99 USD
Limited Qty Sale
Free Shipping
Sale - Save 7%
$ 73.99

This product was last offered at the strikethrough price on
08-17-2026

$ 68.99 USD
Limited Qty Sale
Free Shipping
SEE T#337981

Uro - Aluminum Coolant Hose Connector for E9x, and Z4
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:37757289
Part#: 11537545890PRMK
In Stock
$ 24.99 USD
Free Shipping on orders $49 and up
Aluminum Connector that replaces the OEM brittle Plastic

Mishimoto - Corporate Logo
T#:384864
Part#: MMRAD-E46-323A
In Stock
$ 539.99 USD
$ 539.99 USD

Discover Mishimoto's solution, perfect for both daily drivers seeking a reliable OEM radiator upgrade and dedicated racers requiring a high-performance racing radiator. This high-quality aluminum radiator serves as a crucial cooling system component, offering larger coolant capacity and increased surface area for superior heat dissipation compared to OEM plastic.

The aluminum construction ensures enhanced durability, backed by Mishimoto's lifetime warranty, potentially making this radiator your last purchase!

Key Features:

  • Fully brazed aluminum core with TIG-welded end tanks
  • Compatible with stock clutch fan or Mishimoto electric fan shroud
  • Precision-designed CNC-machined quick-disconnect fittings for perfect hose compatibility
  • Track-tested design for reliability
  • 18% increase in coolant surface area
  • 41% increase in air surface area
  • 20% increase in coolant capacity

*WARNING: Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) may apply to this product. For more information about California Prop 65 warning, visit www.P65Warnings.ca.gov.*

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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
Free Shipping on orders $49 and up
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 - Corporate Logo
T#:150726
Part#: 64216902679
Ships in 4 Business Days
Sale - Save 8% $ 34.99

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

$ 32.31 USD
Free Shipping on orders $49 and up
Sale - Save 8%
$ 34.99

This product was last offered at the strikethrough price on
08-26-2026

$ 32.31 USD
Free Shipping on orders $49 and up


Genuine BMW Hose F Water Valve And Radiator
This item fits the following BMW Chassis:
E46 M3,E46

URO - Corporate Logo
T#:43750239
Part#: 64218376153
In Stock
$ 29.99 USD
Free Shipping on orders $49 and up
Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine. With the proper diameter, bends, and lengths, this is the perfect replacement for any swelled or damaged hose. An easy installation, it's piece of mind the next time you are on a long trip or your morning commute.
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Water Pipe
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594365
Part#: 11537502000
In Stock
$ 39.99 USD
Free Shipping on orders $49 and up
Water pipes are essential for proper cooling. If they are cracked, they are going to need to be replaced as soon as possible to avoid overheating your engine. This water pipe runs from the back of the water pump housing to the expansion tank hose. Includes all required seals, needed for the install.
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Mishimoto - Corporate Logo
T#:51075086
Part#: MMTS-E46-99E
In Stock
New Item
$ 91.99 USD
Free Shipping on orders $49 and up
The Mishimoto Thermostat Assembly focuses on precision fitment and long-term durability.
Spal - Corporate Logo
T#:598801
Part#: 30100375
In Stock
$ 99.99 USD
Free Shipping
$ 99.99 USD
Free Shipping
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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Expansion Tank Mounting Plate
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402140
Part#: 17111436250
In Stock
$ 70.99 USD
Free Shipping
$ 70.99 USD
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Mishimoto - Corporate Logo
T#:378422
Part#: MMFAN14
In Stock
$ 100.99 USD
Free Shipping
$ 100.99 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#:637389
Part#: MMFAN-14C
In Stock
$ 104.99 USD
Free Shipping
$ 104.99 USD
Free Shipping
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
Free Shipping on orders $49 and up

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 - Corporate Logo
T#:367703
Part#: 11537502000
In Stock
Sale - Save 75% $ 221.99

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

$ 54.77 USD
Free Shipping
Sale - Save 75%
$ 221.99

This product was last offered at the strikethrough price on
04-06-2026

$ 54.77 USD
Free Shipping

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
Free Shipping
$ 196.99 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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DO88 - Corporate Logo
T#:13891851
Part#: OC120E46
In Stock
$ 646.99 USD
Free Shipping on orders $49 and up
This racing oil cooler shines in low-pressure situations, for example, power steering oil cooling or gearbox oil cooling. This oil cooler comes ready to install with hardware.

Mishimoto - Corporate Logo
T#:388187
Part#: MMHOSEE46NONM
In Stock at Vendor
Starting at $ 199.99 USD
Free Shipping
Starting at $ 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#:391596
Part#: MMRAD-E46
Ships in 3 Business Days
Starting at $ 503.99 USD
Starting at $ 503.99 USD

Mishimoto E46 Aluminum Radiator features -

  • All aluminum construction
  • More durable and longer lasting than plastic components
  • 20% more capacity in the same space
  • Excellent fit and finish
  • Unbeatable lifetime warranty and accident-forgiveness

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!

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 continuous evolution of product design. Mishimoto is so dedicated to quality that they offer a limited lifetime warranty and accident forgiveness.

Radiators for manual and automatic transmissions are different. Choose the one correct for your model from the options below.

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Thermostat With Housing
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:582356
Part#: 11537509227
Ships in 3 Business Days
$ 89.99 USD
Free Shipping
$ 89.99 USD
Free Shipping
Stop leaks before they start with this new Thermostat With Housing from Rein.

Advanced Auto Fabrication - Corporate Logo
T#:7624641
Part#: 116251
In Stock at Vendor
$ 140.00 USD
$ 140.00 USD
Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. AAF has created a light-weight fan shroud for your E46 race car. Equipped with 7 flaps to let as much air through as possible at speed and fits a 14' fan. Seamlessly attaches to the AAF Radiator Mounts. The shroud creates a vacuum to expand the fan’s ability to pull from the entire surface area of the radiator. This creates cooler temps under the hood with the benefit of 7 flaps that allow the most air to pass through. **AAF states fitment has only been thoroughly tested with their radiator mounts. No fitment info for the stock plastic mounts is available at this time. AAF has created a light-weight fan shroud for your E46 race car. Equipped with 7 flaps to let as much air through as possible at speed and fits a 14' fan. Seamlessly attaches to the AAF Radiator Mounts. The shroud creates a vacuum to expand the fan’s ability to pull from the entire surface area of the radiator. This creates cooler temps under the hood with the benefit of 7 flaps that allow the most air to pass through. **AAF states fitment has only been thoroughly tested with their radiator mounts. No fitment info for the stock plastic mounts is available at this time. *Does not include fan.
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TYC - Corporate Logo
T#:374227
Part#: 64546988913
Ships in 1 Business Day
$ 261.99

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

$ 254.99 USD
$ 254.99 USD
Cooling fan mounted in front of the radiator
Mishimoto - Corporate Logo
T#:391597
Part#: MMFS-E46-99
Ships in 3 Business Days
Starting at $ 420.99 USD
Starting at $ 420.99 USD

This electric fan for the E46 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)
  • 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 6whp - 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 seemless 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. There are two styles of Mishimoto fan controllers - a sensor located in a 1/8" NPT plug or as a 6" probe inserted between the fins on the radiator. For BMW applications, the NPT plug is usually the best and Mishimoto has this port built into their radiator designs (most other aluminum radiators do as well). For the E46, Mishimoto has a dedicated wiring harness with the optional controller that takes power from the factory fuse panel.

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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
Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans
For vehicles with automatic transmission only
Genuine BMW - Corporate Logo
T#:12560
Part#: 17111436251
In Stock
Sale - Save 51% $ 205.99

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

$ 101.32 USD
Free Shipping
Sale - Save 51%
$ 205.99

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

$ 101.32 USD
Free Shipping
This Genuine BMW part is the mounting bracket from the radiator to the expansion tank on E46 3 series and E85/E86 Z4 with Automatic Transmission.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si
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Expansion Tank Retaining Plate
For vehicles with automatic transmission only
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:362912
Part#: 17111436251
Ships in 1 Business Day
$ 53.99 USD
Free Shipping on orders $49 and up
$ 53.99 USD
Free Shipping on orders $49 and up
Mounts to the side of the radiator for retaining the expansion tank

URO Auxiliary Pusher Fan Assembly - With Frame - E46
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:592701
Part#: 64546988913
Back Ordered
$ 202.99 USD
$ 202.99 USD
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 with this piece 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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Mishimoto - Corporate Logo
T#:385256
Part#: MMHOSEE46NONMRD
Back Ordered
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
Mishimoto - Corporate Logo
T#:384863
Part#: MMRAD-E46-323
Ships in 3 Business Days
$ 503.99 USD
$ 503.99 USD

Upgrade your radiator with Mishimoto, whether you're a daily driver seeking reliable quality or a racer in need of high-performance cooling. Mishimoto's aluminum radiator offers increased coolant capacity, better heat dissipation, and superior durability compared to OEM plastic radiators. Backed by a lifetime warranty, it may be the last radiator you'll ever need.

Key Features:

  • Fully brazed aluminum core with TIG-welded end tanks
  • Compatible with stock clutch fan or Mishimoto electric fan shroud
  • Precision-designed CNC-machined quick-disconnect fittings for seamless integration with stock hoses
  • Track-tested design
  • 18% increase in coolant surface area
  • 41% increase in air surface area
  • 20% increase in coolant capacity

Note: This product may be subject to Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) in California. Proposition 65 requires disclosure of chemicals known to cause cancer, birth defects, or other reproductive harm if present above very low levels. For more information about California Prop 65 warnings, visit 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#: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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Nissens Radiator - Manual - E46, Z4
For vehicles with manual transmission only and production date from 05/2005
Nissens - Corporate Logo
T#:362195
Part#: 17119071517
Ships in 1 Business Day
$ 184.70

This product was last offered at the strikethrough price on
05-11-2026

$ 170.94 USD
$ 170.94 USD
Replace your leaking radiator.

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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Spal - Corporate Logo
T#:2181323
Part#: FRH
Ships in 3 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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Advanced Auto Fabrication - Corporate Logo
T#:7624640
Part#: 116223
Ships in 3 Business Days
$ 190.00 USD
Free Shipping
$ 190.00 USD
Free Shipping
Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. Ideal for the SE46 racing series, the AAF E46 6-speed Transmission Crossmember is a heavy-duty and worthwhile upgrade. The OEM thin cast aluminum cross member has been known to fail in multiple different ways. When using stiff engine and transmission mounts, the cross member can crack out and break around these mounting points. The cross member can also break from the high amounts of load transferred through the drive train. While chassis flex from hard cornering is being applied through the engine and transmission from the front cross member, this load is sent from the transmission back into the chassis at the transmission cross member. This is simply too much stress for the OEM cross member to hold up to under the extreme punishment of road racing. The AAF E46 Transmission Cross Member is completely constructed of 1/4' thick heavy-duty aluminum plate. It is designed specifically to cope with hours of endurance racing.
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Mishimoto - Corporate Logo
T#:378443
Part#: MMFAN12
Ships in 3 Business Days
$ 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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DO88 - Corporate Logo
T#:13891809
Part#: WC310S
Ships on Sep 18, 2026
$ 735.99 USD
$ 735.99 USD
The team at DO88 has vigorously tested this radiator to deliver peak performance with the peace of mind of quality for your E46 M3. They guarantee reliability and endurance in all situations to let your car breathe better than before! Boasting a 17% increase in core volume, this upgrade is a no-brainer for petrol heads like us. Keeping core temperatures low eliminates the risk of heat soak leading to overheating giving you max performance at any given moment. no compromise has been made at DO88 leaving you with one of the best radiator options on the market!
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Mishimoto - Corporate Logo
T#:378416
Part#: MMHOSEE4699RD
Ships in 3 Business Days
$ 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#:51039998
Part#: MMB-E46-001
Ships in 3 Business Days
New Item
$ 1,108.99 USD
$ 1,108.99 USD
This bundle optimizes the E46’s thermal efficiency by converting the heavy, parasitic mechanical clutch fan to a high-flow electric unit.

Spal - Corporate Logo
T#:598818
Part#: 30102113
In Stock at Vendor
$ 257.99 USD
Free Shipping
$ 257.99 USD
Free Shipping
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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Gear Wrench - Corporate Logo
T#:387079
Part#: KDT3977
Ships in 1 Business Day
$ 53.99 USD
Free Shipping on orders $49 and up
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.

Mishimoto - Corporate Logo
T#:378891
Part#: MMFSE4601
Ships in 3 Business Days
$ 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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ATD Tools - Corporate Logo
T#:3657943
Part#: ATD3601
Ships in 1 Business Day
$ 59.99 USD
Free Shipping on orders $49 and up
Always have extra o-rings

Mishimoto - Corporate Logo
T#:378412
Part#: MMFAN12BL
Ships in 3 Business Days
$ 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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Genuine BMW - Corporate Logo
T#:14121
Part#: 64218376999
Ships in 3 Business Days
2% off MSRP $ 56.99

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

$ 55.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 56.99

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

$ 55.99 USD
Free Shipping on orders $49 and up


BMW Hose F Engine Inlet And Water Valve -
This item fits the following BMW Chassis:
E46

Mahle-Behr Radiator - Manual - E46, Z4
For vehicles with manual transmission only and production date from 05/2005
Mahle-Behr - Corporate Logo
T#:341268
Part#: 17119071517
Ships in 1 day
$ 250.99

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

$ 243.99 USD
$ 243.99 USD
Replace your leaking radiator.
Genuine BMW - Corporate Logo
T#:12524
Part#: 32412282353
Ships in 3 Business Days
2% off MSRP $ 280.99

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
2% off MSRP
$ 280.99

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


Genuine BMW Radiator Return Line
This item fits the following BMW Chassis:
E46 M3,E46



Genuine BMW - Corporate Logo
T#:374891
Part#: 11531436408KT
Ships in 3 Business Days
$ 548.99

This product was last offered at the strikethrough price on
06-03-2026

$ 546.99 USD
Free Shipping
$ 546.99 USD
Free Shipping

ECS Tuning BMW Cooling Hose Kit

Protect your BMW's cooling system with ECS Tuning's all-inclusive cooling hose kit. Engineered to endure extreme temperature fluctuations and environmental exposure, these hoses reduce the risk of unexpected failures that could leave you stranded.

  • Comprehensive kit covering all necessary cooling system hoses
  • Designed to withstand vast temperature changes and exposure to elements
  • Prevents unexpected failures and potential breakdowns
  • Includes a gallon of coolant for a complete service solution

Check the kit contents tab for a detailed list of included components.

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Genuine BMW Fan Shroud
For bosch fans only
Genuine BMW - Corporate Logo
T#:45887
Part#: 17117511168
Ships in 4 Business Days
2% 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.

$ 127.99 USD
2% 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.

$ 127.99 USD


Genuine BMW Fan Shroud -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M52,M54