BMW Cooling System Parts & Accessories for BMW 7 Series E66 (2002-2008)

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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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Bav Auto Spill-Proof Coolant / Antifreeze Funnel
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Bav Auto Tools - Corporate Logo
T#:580395
Part#: B8800082
In Stock
Sale - Save 15% $ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD
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Sale - Save 15%
$ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD
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Multiple adapters include to fit a variety of vehicles.
Bav Auto Fan Clutch Wrench - 32mm
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Bav Auto Tools - Corporate Logo
T#:580348
Part#: B8800019
In Stock
Sale - Save 20% $ 29.99

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

$ 23.99 USD
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Sale - Save 20%
$ 29.99

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

$ 23.99 USD
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Used to remove your fan clutch
Bav Auto Tools - Corporate Logo
T#:580397
Part#: B8800084
In Stock
Sale - Save 15% $ 146.99

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

$ 124.94 USD
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Sale - Save 15%
$ 146.99

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

$ 124.94 USD
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Mahle-Behr - Corporate Logo
T#:11937
Part#: 17117519209
Ships in 1 Business Day
$ 299.99

This product was last offered at the strikethrough price on
07-16-2026

$ 256.75 USD
$ 256.75 USD

OEM HELLA/BEHR brand replacement radiator for E60 525i/528i/530i and 550i, E63 650i, E65 750i/li 10/2005+. This radiator is made by HELLA/BEHR, an original equipment supplier to BMW. HELLA/BEHR radiators are what we use our own BMWs and customer installs. We've found the HELLA/BEHR radiator has the highest lifespan, least amount of manufacturing defects, and best continued cooling performance for your BMW. Simply put, you do not want anything else in your BMW but a HELLA/BEHR brand radiator.

Click here for important info on the 2006-2010 525i/528i/530i radiator.

 

Hella/Behr is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMWs:
2004-2005 E60 BMW 525i 530i (M54)- Only for Automatic Transmission
2006-2010 E60 BMW 525i 528i 530i (N52)* - Only for Automatic Transmission
2006-2010 E60 BMW 550i - Only for Automatic Transmission
2006-2011 E63 BMW 650i - Only for Automatic Transmission
10/2005-2008 E65 BMW 750i 750li

* - must see link above about N52 fitments.

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Bav Auto Angled Hose Pinch Plier Set - 2pc
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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
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Sale - Save 25%
$ 32.99

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

$ 24.74 USD
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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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Mahle-Behr - Corporate Logo
T#:15093
Part#: 17117585440
Ships in 1 Business Day
$ 253.95

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

$ 218.06 USD
$ 218.06 USD

This radiator is the OEM Hella replacement for the stock radiator in the E60 545i and E63 645ci and E65 745i. Keeping your BMW at peak performance means including your cooling system in your regular maintenance schedules with the radiator, water pump, and thermostat being the primary components needing replacement. Not only can a failed radiator leave you stranded, but the sophisticated engine electronics will limit engine operability if temperatures reach a certain level. So having an efficient and fully functional cooling system is critical not only for safety but for performance as well. Don't wait until it's too late!

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMW Chassis:2004-2005 E60 BMW 545i - Automatic Transmission
2004-2005 E63 BMW 645ci - Automatic Transmission
2002-3/2005 E65 BMW 745i 745li 760i 760li
Fits BMW Engines including:
N62,N73

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Mahle-Behr - Corporate Logo
T#:371683
Part#: 17417505109
Ships in 2 Business Days
$ 247.81

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

$ 223.92 USD
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$ 223.92 USD
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This clutch engages the belt-driven engine fan when the engine is warm/hot, and dis-engages the fan when cold/cool. These commonly fail, causing the engine fan to not spin fast enough (or at all) when your car is stopped in traffic, causing engine to overheat.

This item fits the following BMWs:
2002-2006  E65 BMW  745i 745li 760i 760li
2000-2003  E53 BMW  X5 4.4i X5 4.6is
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Mahle-Behr - Corporate Logo
T#:2766
Part#: 17111742231
In Stock
$ 20.99

This product was last offered at the strikethrough price on
09-10-2026

$ 19.99 USD
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$ 19.99 USD
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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i 540i M5
1989-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1998 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2011 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 30.0i X5 4.4i X5 4.6is X5 4.8is
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Coupe M Roadster
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si M Roadster M Coupe
2000-2003 E52 BMW Z8 Z8 Alpina
2007+ E90 BMW 335i & 335xi
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Meyle Expansion Tank Cap
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Meyle - Corporate Logo
T#:579357
Part#: 3148009004
In Stock
Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD
Free Shipping on orders $49 and up
Sale - Save 40%
$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD
Free Shipping on orders $49 and up
Replace worn or missing pieces.

Behr Radiator Replacement
For Automatic Vehicles only
Behr - Corporate Logo
T#:591355
Part#: 17117519211
Ships in 1 Business Day
$ 454.11

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

$ 388.67 USD
$ 388.67 USD
Replace your faulty or worn radiator with this factory replacement
Mahle-Behr - Corporate Logo
T#:186486
Part#: 17137647713
Ships on Oct 1, 2026
$ 81.99 USD
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$ 81.99 USD
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This high quality BEHR brand expansion tank is used on E65/E66 7 series with the N62 and N73 engines, and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own BMWs.

If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. Replaces part numbers 17137543003 and 17138600275.

This item fits the following BMWs:
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
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Auxiliary Electric Water Pump
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Meyle - Corporate Logo
T#:57014181
Part#: 64116913489
Ships on Oct 1, 2026
New Item
$ 75.99 USD
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Keep your heating and cooling systems performing sharply with a precision-fit replacement built for long-haul reliability.


Meyle Engine Coolant Thermostat - BMW FXX, GXX
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Meyle - Corporate Logo
T#:52797701
Part#: 3282280016
Ships on Oct 1, 2026
New Item
$ 47.99 USD
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This MEYLE thermostat ensures your engine stays at the perfect temperature for efficiency and power.
Fluid Level Sensor
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Meyle - Corporate Logo
T#:5973204
Part#: 17117546548
Ships on Oct 1, 2026
$ 13.99 USD
Free Shipping on orders $49 and up
MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548
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Auxillary Fan Switch
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Meyle - Corporate Logo
T#:4934936
Part#: 3148210000
Ships on Oct 1, 2026
$ 18.99 USD
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$ 18.99 USD
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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary. Also known as the coolant temperature sending unit, comes with related o-ring
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Mahle-Behr - Corporate Logo
T#:594799
Part#: 17117585439
Back Ordered
$ 253.97 USD
Free Shipping on orders $49 and up
Replace your leaking or high-mileage radiator.