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

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:

Thermostat Replacement kit - 90C
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:15744051
Part#: 82142209769KT
In Stock
Sale - Save 3% $ 146.99

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

$ 142.66 USD
Free Shipping on orders $49 and up
Sale - Save 3%
$ 146.99

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

$ 142.66 USD
Free Shipping on orders $49 and up
Water Pump Replacement Kit - E60 550i, E63 650i, E65 750i, E70 X5 4.8...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:554067
Part#: 11517531859KT4
In Stock
Sale - Save 19% $ 275.99

This product was last offered at the strikethrough price on
01-13-2026

$ 224.28 USD
Free Shipping
Sale - Save 19%
$ 275.99

This product was last offered at the strikethrough price on
01-13-2026

$ 224.28 USD
Free Shipping

The water pumps in BMW's should be serviced near 80,000 miles and may become an 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
  • Geba water pump
  • Vaico coolant
  • Mounting hardware required for the water pump


This item fits the following BMWs:
2006-2010 E60 BMW 550i
2006-2010 E63 BMW 650i
2005-2008 E65 BMW 750i 750li
2007-2013 E70 BMW X5 4.8i X5 xDrive48i

Show More Show Less
Thermostat & Water Pump Replacement Kit - BMW N62 4.8L
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:30397457
Part#: 11517586779KT2
Ships in 1 Business Day
$ 273.99

This product was last offered at the strikethrough price on
05-12-2026

$ 270.99 USD
Free Shipping on orders $49 and up
$ 270.99 USD
Free Shipping on orders $49 and up

Maintain your BMW's cooling system and avoid costly repairs with our comprehensive Water Pump and Thermostat Replacement Kit, meticulously crafted by the experts at Turner Motorsport! Designed to service BMW models with the N62 engine, this kit ensures your vehicle runs at optimal temperature, preventing overheating and extending engine life.

Key Benefits:

All-Inclusive Kit: This package includes everything you need for a complete cooling system overhaul, saving you time and effort sourcing individual components. High-Quality Components: Each part in this kit is manufactured to meet or exceed OEM standards, guaranteeing reliable performance and longevity. Optimal Cooling Performance: Regularly replacing your water pump and thermostat every 60,000 miles is crucial for maintaining peak cooling efficiency. Our kit ensures your BMW's engine stays within the ideal temperature range, preventing overheating and potential engine damage. Enhanced Reliability: By including premium components like the Wahler Thermostat and Graf Water Pump, this kit provides enhanced durability and peace of mind. Kit Contents:

Wahler Thermostat (Part #11537586885): Renowned for its precision and reliability, ensuring your engine maintains the correct operating temperature. Graf Water Pump (Part #11517586779): High-performance pump designed for consistent and efficient coolant circulation. Genuine BMW Hex Bolts (M6x25) (Part #07119905400): Essential hardware for secure installation. Genuine BMW Hex Bolts (M6x40) (Part #07119904525): Ensures all components are firmly in place. Genuine BMW Coolant/Antifreeze (Diluted, 1 Gallon) (Part #82141467704): Formulated specifically for BMW cooling systems, providing optimal protection against corrosion and freezing. Upgrade your BMW N62 cooling system with this expertly curated Water Pump and Thermostat Replacement Kit. Perfect for maintaining the health and efficiency of your engine, this kit is an essential investment for any BMW enthusiast. Order now from Turner Motorsport and ensure your vehicle performs at its best.

Show More Show Less

Rein Radiator Hose - Upper - E65, E66
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379749
Part#: 17127535742
Ships in 3 Business Days
$ 89.99 USD
Free Shipping
$ 89.99 USD
Free Shipping
A common source of cooling system failure

Expansion Tank Vent Hose
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592006
Part#: 17127541146
In Stock at Vendor
$ 36.99 USD
Free Shipping on orders $49 and up
Replace your leaking hose
Rein Coolant Vent Pipe - E65, E66
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591999
Part#: 17127534527
Ships in 3 Business Days
$ 30.99 USD
Free Shipping on orders $49 and up
Connects the radiator to the expansion tank

Coolant Hose
For vehicles with production date from 09/2003
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379683
Part#: 17127568246
Ships in 3 Business Days
$ 37.99 USD
Free Shipping on orders $49 and up
$ 37.99 USD
Free Shipping on orders $49 and up
This is the return hose that attaches from the water pump to the radiator
OEM Rein Coolant Expansion Tank Hose - Lower - BMW E65/66 7 Series ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:375750
Part#: 17127508015
Back Ordered
$ 29.99 USD
Free Shipping on orders $49 and up
Attaches from the bottom fitting on the expansion tank to the supply hose. 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.
Show More Show Less

OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:340541
Part#: 17111742231
In Stock
$ 17.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

Rein Cooling O-Ring - E53, E60, E63, E64, E65, E66, E70
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:362446
Part#: 11531710048
In Stock
$ 4.07 USD
Free Shipping on orders $49 and up
Seals the rear of the water transfer pipe to the block
Rein Coolant Expansion Tank - E65, E66
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:593077
Part#: 17137647713
Ships in 3 Business Days
$ 99.99 USD
Free Shipping
$ 99.99 USD
Free Shipping
Replace your cracked or faded tank
OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Rein - Corporate Logo
T#:45791754
Part#: 17127508011R
Ships in 3 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.
Show More Show Less


Cool Retrun Hose
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379713
Part#: 17127540666
Ships in 3 Business Days
$ 80.99 USD
Free Shipping
$ 80.99 USD
Free Shipping
Connects to the radiator
OEM Rein Coolant Hose w/ Temperature Sensor - BMW E60 E63/E64 E65/E66...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:375746
Part#: 17127508011
In Stock at Vendor
$ 75.99 USD
Free Shipping
$ 75.99 USD
Free Shipping
This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.
Show More Show Less
Expansion Tank Vent Hose
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379672
Part#: 17127508013
Ships in 3 Business Days
$ 60.99 USD
Free Shipping
$ 60.99 USD
Free Shipping
A commonly leaking hose

Radiator Support Bracket
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:14122755
Part#: 17117514402
Special Order: No Guaranteed ETA
$ 8.99 USD
Free Shipping on orders $49 and up
Mounts to top of radiator bracket, 2 per vehicle.

Rein Coolant Return Pipe - N62 N73
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:386411
Part#: 11511439976
Special Order: No Guaranteed ETA
$ 14.99 USD
Free Shipping on orders $49 and up
This is the coolant return pipe on the back of the water pump on the N62 and N73 engines used in the E53 X5, E60 545/550, E63 645/650, E65 745/750, E70 X5, and F02 750. This pipe connects the water pump to the valley pan and it's a compression fitting (no o-rings). Whenever the water pump or valley pan are replaced this tube should also be replaced. This is one area where you don't want to go back and re-do your work because of a leaking fitting! In German, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the worldaEURtms finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.
Show More Show Less
OEM Rein Coolant Supply Hose - E65 E66
For vehicles with production date up to 09/2003
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:375745
Part#: 17127508010
Back Ordered
$ 134.99 USD
Free Shipping
$ 134.99 USD
Free Shipping
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.

Coolant Hose
For vehicles with production date up to 09/2003
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379702
Part#: 17127508014
Back Ordered
$ 25.99 USD
Free Shipping on orders $49 and up
$ 25.99 USD
Free Shipping on orders $49 and up
This is the return hose that attaches from the water pump to the radiator