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BMW Cooling System Parts & Accessories for BMW 3 Series E91 (2006-2012)

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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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Water Pump And Thermostat Kit - BMW N52 3.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:17073598

Part#: 11537549476KT

In Stock

Sale - Save 25% $ 424.99

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

$ 319.88 USD

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Sale - Save 25%

$ 424.99

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

$ 319.88 USD

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Includes everything you may need to replace your water pump and thermostat.

Cooling System Hose Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:24212306

Part#: E9XN52CHKT

In Stock

Sale - Save 5% $ 189.99

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

$ 179.93 USD

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Sale - Save 5%

$ 189.99

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

$ 179.93 USD

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Replace your cooling system hoses with this complete kit including coolant

Water Pump and Thermostat Package - N51/N52 Engine - E82 128i, E9X 32...

10X Entries Into Our F80 M3 Sweepstakes

T#:42873693

Part#: TMS206099GKT

In Stock

$ 879.19

This product was last offered at the strikethrough price on
09-14-2026

$ 729.35 USD

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$ 729.35 USD

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Our water pump/thermostat overhaul includes:

Electric Water Pump
Aluminum mounting screws for water pump
Thermostat
Connecting hose from thermostat to water pump
Hose clamps

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Expansion Tank Replacement Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15744017

Part#: N524ECSTNKKT-KT

In Stock

Sale - Save 35% $ 154.99

This product was last offered at the strikethrough price on
04-17-2026

$ 100.95 USD

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Sale - Save 35%

$ 154.99

This product was last offered at the strikethrough price on
04-17-2026

$ 100.95 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it. The kit includes: Expansion tank with level sensor URO expansion tank cap Genuine BMW expansion tank grommet Genuine BMW mounting bolts

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Water Pump And Thermostat Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15511872

Part#: 821414677040KT

In Stock

Sale - Save 26% $ 635.99

This product was last offered at the strikethrough price on
09-14-2026

$ 470.81 USD

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Sale - Save 26%

$ 635.99

This product was last offered at the strikethrough price on
09-14-2026

$ 470.81 USD

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The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Kit includes: Mahle-Behr thermostat Water pump Genuine BMW coolant Mounting hardware required for both the thermostat and water pump

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Oil Filter Housing Replacement Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:57507416

Part#: 11428642283KT4

In Stock

$ 361.99 USD

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$ 361.99 USD

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Maintain reliable oiling system performance and prevent catastrophic oil leaks on the street or track with an Oil Filter Housing Replacement Kit. Designed to replace failing or heat-warped factory housings, this complete assembly cures problematic oil leakage while ensuring proper oil flow through your engine's lubrication circuit. Bundled with a fresh oil pressure sensor, factory sealing gaskets, and new mounting hardware, this kit provides a complete overhaul solution to safeguard engine health and ensure precise oil pressure readings under extreme operating conditions.

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Cooling System Service Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:57507415

Part#: 11428642283KT3

In Stock

$ 458.99 USD

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$ 458.99 USD

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Eliminate common top end oil leaks and fragile plastic cooling components with the ultimate preventive maintenance package for your BMW. Designed for thorough maintenance or prep before track days, this kit pairs a new oil filter housing assembly with fresh gaskets and hardware to restore leak-free oil pressure management. To address vulnerable factory cooling lines, the package includes an upgraded ECS billet aluminum coolant flange, replacing the failure-prone OEM plastic fitting with a permanent metal solution. Bundled with factory Genuine BMW coolant, this service kit delivers peace of mind under extreme driving conditions.

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ECS Cooling System Refresh Kit - Level 2

10X Entries Into Our F80 M3 Sweepstakes

T#:15710821

Part#: 17137607482-KT

In Stock

Sale - Save 19% $ 912.99

This product was last offered at the strikethrough price on
09-14-2026

$ 740.04 USD

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Sale - Save 19%

$ 912.99

This product was last offered at the strikethrough price on
09-14-2026

$ 740.04 USD

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As your mileage increases, so does wear and tear on your engine's cooling components. Cooling system components live a rough life, going through extreme temperature changes and being exposed to the elements. A cooling system failure can, and probably will leave you stranded. Included in this kit Water pump with new bolts Thermostat & housing Expansion tank with level sensor Expansion tank cap 1 Gallon of OEM Coolant Waterpump & thermostat hoses Upper and lower radiator hoses Accessory belt

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Red Line SuperCool Performance Coolant - Pre-Mixed - 1 Gallon ...

T#:640436

Part#: 81215

In Stock

$ 54.99 USD

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$ 54.99 USD

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Red Line SuperCool Performance Coolant fortified with WaterWetter is a 50/50 prediluted antifreeze/coolant designed to maximize the performance of your cooling system with superior protection against cavitation corrosion/erosion. Using 100% SuperCool Performance protects the entire cooling system, keeping new components like new for 5 years/150,000 miles and prevents further damage to older components. Red Line’s proprietary coolant additive formula enhances the fluid’s ability to transfer heat, reducing operating temperatures by up to 20*F and prolonging the life of the entire cooling system. Red Line's SuperCool is an OAT coolant that is a Nitrate and Silicate Free product with its own proprietary corrosion technology to offer superior protection for aluminum engines found in all European vehicles, performance vehicles, as well as other applications. SuperCool will not void the factory warranty either. It can be used to top off the existing coolant of any BMW and will not cause any ill-effects on the cooling system because it is silicate and nitrate free. It is still better to flush it out and switch completely to SuperCool to get all the full benefits of the product in performance and protection.

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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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Red Line Water Wetter Heat Transfer Agent

T#:3607

Part#: 1-WW-12Z

In Stock

$ 15.99 USD

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$ 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. Or it can be added to new or used antifreeze to improve the heat transfer of ethylene and propylene glycol systems. Designed for modern aluminum, cast iron, copper, brass, and bronze systems.

We have been using RedLine Oil in our street cars and race cars for years. Hands-down, it is the Number One brand of high performance lubricant for BMWs.

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