BMW Cooling Overhaul Kits for BMW E46 M3 S54 (1999-2005)

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If you are the type of person who, rather than fixing individual components as they break, likes to refresh everything at once to make sure your cooling system is stout, then you're in the right place. Our overhaul kits give you the option to purchase everything you need to get your cooling system back in check at once. Our overhaul kits generally include thermostat, water pump, radiator, hoses, and expansion tanks.
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High-Performance Cooling System Service Kit - Level 3
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Packaged by Turner - Corporate Logo
T#:41391174
Part#: 008682LA02RF3KT
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01-03-2026

$ 1,648.42 USD
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Sale - Save 6%
$ 1,748.31

This product was last offered at the strikethrough price on
01-03-2026

$ 1,648.42 USD
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Due to weak rubber and plastic construction, vital cooling system parts are prone to premature failure. Key components, such as radiator hoses, the thermostat, and the expansion tank are particularly prone to cracks, leaks, and catastrophic failure, which can lead to overheating and potentially severe engine damage. Fortunately, our team of experts has assembled this kit of high-performance alternatives and high-quality OE replacement components, both tailored to safeguard your cooling system from failure and increase cooling system capability.

Our Level 3 High-Performance Cooling System Service Kit is the ultimate solution for ensuring long-term reliability and enhanced cooling performance. Each component in this comprehensive kit has been carefully selected by our team of enthusiasts to address common failure points and provide a robust, performance-oriented upgrade for your vehicle. By replacing aging factory parts with premium, high-performance alternatives, you’ll optimize cooling efficiency and safeguard your engine from the stress of overheating.

Our all-inclusive "Level 3" High-Performance Cooling System Service Kit includes:

CSFxTurner Performance Triple-Pass Aluminum Radiator Turner Motorsport Heavy Duty Aluminum Expansion Tank ECS Silicone Radiator Hoses ECS Aluminum Water Pump Pulley Wahler Thermostat (80°C) Bremmen Aluminum Water Pump Bremmen Parts Auxiliary Fan Switch Continental Accessory Belt ECS Kevlar-Reinforced A/C Compressor Drive Belt Genuine BMW Water Pump O-Ring Genuine BMW Water Pump Bolts Genuine BMW G48 Antifreeze (1 Gallon) Redline Water Wetter Performance Coolant Additive (12 oz.)

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Basic Cooling System Service Kit - E46 BMW M3 w/ Saleri Pump ...
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Packaged by Turner - Corporate Logo
T#:557927
Part#: E46M3BCKT1
In Stock at Vendor
Sale - Save 6% $ 659.99

This product was last offered at the strikethrough price on
06-22-2026

$ 623.64 USD
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Sale - Save 6%
$ 659.99

This product was last offered at the strikethrough price on
06-22-2026

$ 623.64 USD
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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Basic Cooling System Service Kit - E46 BMW M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:557246
Part#: E46M3BCKT
In Stock
Sale - Save 2% $ 623.99

This product was last offered at the strikethrough price on
06-26-2026

$ 612.02 USD
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Sale - Save 2%
$ 623.99

This product was last offered at the strikethrough price on
06-26-2026

$ 612.02 USD
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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Complete Cooling System Overhaul Package - 2001-2006 E46 M3
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Packaged by Turner - Corporate Logo
T#:338740
Part#: TMS338740
Ships on Aug 17, 2026
Sale - Save 1% $ 968.99

This product was last offered at the strikethrough price on
06-26-2026

Starting at $ 957.58 USD
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Sale - Save 1%
$ 968.99

This product was last offered at the strikethrough price on
06-26-2026

Starting at $ 957.58 USD
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As the E46 M3 gets on in years and mileage, the cooling system will be one of the areas that needs the most attention. We have packaged all of the major cooling components into one overhaul kit:

  • radiator
  • water pump
  • thermostat
  • radiator hoses and clamps
  • gaskets and o-rings

We have found that the E46 M3 can develop inconvenient cooling issues, even on daily driven street cars. While the infamous radiator and water pump failures of the E36 are a thing of the past, the E46 M3 still has its own complications. The best approach to avoid bigger problems is preventative maintenance. We recommend replacing the water pump before 80,000 miles and the radiator before 100,000 miles. By addressing these problem areas before a failure, you will save yourself a larger repair bill in the future.

In addition to the standard cooling package items above, there are several other cooling-related components that may make sense to do at the same time:

  • Original BMW coolant
  • fan clutch
  • main serpentine belt and A/C belt
  • Turner Power Pulley Kit (because now is the perfect time!)

This cooling overhaul package fits:
2001-2006 E46 BMW M3
 

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Cooling System overhaul Kit - E46 M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:554122
Part#: 17127510952KT10
Ships on Nov 11, 2026
$ 1,834.99

This product was last offered at the strikethrough price on
06-25-2026

$ 1,822.99 USD
$ 1,822.99 USD
This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the E46 M3 with the S54 engine. 

A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Keep on top of the cooling needs of your engine for your own piece of mind. Potential buyers also see the upside of a properly maintained car with receipts. 
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High Performance Cooling System Upgrade - E46 M3
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Packaged by Turner - Corporate Logo
T#:557315
Part#: E46MPCKT
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$ 2,184.45 USD
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$ 2,184.45 USD
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If you plan to drive your BMW aggressively on the track, it is important that you upgrade your cooling system to avoid overheating. To ensure your BMW keeps cool on the track, we have built out our new High Performance Cooling System Upgrade kits. Featured in this kit is everything you will need to redo your cooling system from top to bottom with OEM components, with select stock components swapped out for the high performance alternative! This kit includes a high performance Mishimoto Radiator for significantly better cooling than the stock radiator and full aluminum construction that won't crack from long term heat cycling, and a Genuine BMW Motorsport 55*C thermostat, for lower temperature operation and increased cooling of the engine. 

Additional items included in this kit:

  • ECS Tuning Silicone Replacement Coolant Hoses - For increased reliability over stock rubber hoses
  • ECS Tuning Heavy Duty Aluminum Bleeder Screw
  • OEM Expansion Tank, Cap, and Level Sensor
  • OEM Belts, Tensioners, and Pulleys
  • OEM Auxiliary Fan Switch
  • Genuine BMW Hardware for Easy Installation
  • ECS Tuning Aluminum Water Pump Pulley - For increased reliability over the stock composite pulley
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Mishimoto Essentials Bundle - BMW E46 M Cars
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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.

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