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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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Cool Retrun Hose

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:379713

Part#: 17127540666

Ships in 4 Business Days

$ 80.99 USD

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$ 80.99 USD

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Connects to the radiator

Universal 10" Electric Fan - Black

T#:378434

Part#: MMFAN10

In Stock at Vendor

$ 88.99 USD

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$ 88.99 USD

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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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Radiator Pressure Test kit 14 pc

T#:3629267

Part#: ATD3300

Ships in 7 Business Days

$ 497.99 USD

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$ 497.99 USD

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Adapters for most European and domestic vehicles

Genuine BMW Expansion Tank Vent Hose - E65 745i E66 745Li

T#:19520

Part#: 17127508013

Ships in 4 Business Days

6% off MSRP $ 89.99

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

$ 84.99 USD

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6% off MSRP

$ 89.99

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

$ 84.99 USD

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Genuine BMW Vent Pipe -
This item fits the following BMW Chassis:
E65

Fits BMW Engines including:
N62

Bremmen Parts Radiator Cooling Fan Assembly - E60, E61, E63, E64, E65...

T#:1195937

Part#: 17427543282

Ships in 1-2 days

Sale - Save 5% $ 722.15

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

$ 686.04 USD

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Sale - Save 5%

$ 722.15

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

$ 686.04 USD

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Cooling fan with housing

Genuine BMW Radiator Mounting Bracket - E65 760i 760Li

T#:45876

Part#: 17117507973

Ships in 4 Business Days

3% off MSRP $ 169.99

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

$ 164.99 USD

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Qty

3% off MSRP

$ 169.99

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

$ 164.99 USD

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Genuine BMW Mounting Plate -
This item fits the following BMW Chassis:
E65

Fits BMW Engines including:
N73

Genuine BMW Water Hose - From Expansion Tank (Center Fitting) - E66 7...

T#:46153

Part#: 17127508040

Ships in 4 Business Days

6% off MSRP $ 89.99

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

$ 84.99 USD

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Qty

6% off MSRP

$ 89.99

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

$ 84.99 USD

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Genuine BMW Vent Pipe -
This item fits the following BMW Chassis:
E65

Fits BMW Engines including:
N73

Genuine BMW Coolant Hose - E65 745i 745Li 750i 750Li B7 Alpina ...

T#:46151

Part#: 17127508015

Ships in 4 Business Days

6% off MSRP $ 79.99

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

$ 74.99 USD

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Qty

6% off MSRP

$ 79.99

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

$ 74.99 USD

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Genuine BMW Return Pipe -
This item fits the following BMW Chassis:
E65

Fits BMW Engines including:
N62,N62N

Genuine BMW Radiator Support "Front Panel" - E65 E66

T#:117157

Part#: 51717022968

Ships in 6 Business Days

6% off MSRP $ 574.99

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

$ 539.99 USD

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Qty

6% off MSRP

$ 574.99

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

$ 539.99 USD

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Genuine BMW Front Panel Right -
This item fits the following BMW Chassis:
E65

Hepu Water Pump - E65, E66

Vehicles with a production date up to 09/2003

T#:389023

Part#: 11517586780

Ships in 1-2 days

$ 152.99

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

$ 148.99 USD

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$ 148.99 USD

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Address problems related to bad bearings or impellers

Genuine BMW Coolant Supply Hose - E65 745i E66 745Li

For vehicles with production date up to 09/2003

T#:19574

Part#: 17127508010

Ships in 4 Business Days

6% off MSRP $ 154.99

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

$ 145.99 USD

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Qty

6% off MSRP

$ 154.99

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

$ 145.99 USD

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Genuine BMW Supply Hose -
This item fits the following BMW Chassis:
E65

Fits BMW Engines including:
N62

Genuine BMW Radiator Support "Front Panel" - E65 E66

T#:117155

Part#: 51717022966

Ships in 10 Business Days

2% off MSRP $ 428.99

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

$ 419.99 USD

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Qty

2% off MSRP

$ 428.99

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

$ 419.99 USD

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Genuine BMW Front Panel, Center -
This item fits the following BMW Chassis:
E65

Coolant Expansion Tank - E65 745i/li, 750i/li, 760i/li

T#:186486

Part#: 17137647713

Ships on Aug 6, 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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OEM Rein Coolant Supply Hose - E65 E66

For vehicles with production date up to 09/2003

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:375745

Part#: 17127508010

Back Ordered

$ 134.99 USD

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$ 134.99 USD

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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

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