BMW Cooling System Parts & Accessories for BMW 6 Series E64 (2004-2010)

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:
OEM Style Hose Clamps
OEM Style Hose Clamps
Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
In Stock
Sale - Save 3% $ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 3%
$ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Add to Wish List
Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
Show More Show Less
Performance Thermostat - 90C - N62, N63, S63, N73, S55
Performance Thermostat - 90C - N62, N63, S63, N73, S55
Bremmen Parts - Corporate Logo
T#:637061
Part#: 11537586885
In Stock
Sale - Save 20% $ 93.99

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

$ 75.06 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 20%
$ 93.99

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

$ 75.06 USD
Free Shipping on orders $49 and up
Add to Wish List
Includes housing and sealing o-ring A thermostat that opens sooner promotes better cooling in your vehicle. Running a lower temperature thermostat will keep everything much cooler. Keeping the engine cooler will help reduce and improve the life of the seals in your engine, saving you time and money, while also helping to increase engine performance. A tune might be required to gain the most from this modification, as well as to get your car's ECU accustomed to seeing lower temperatures.
Show More Show Less
Meistersatz CAP- EXPANSION TANK
Meistersatz CAP- EXPANSION TANK
Meistersatz - Corporate Logo
T#:1195781
Part#: 17117639021
Ships in 3 Business Days
$ 30.99

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

$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein Upper Radiator Hose - E60, E63, E64
Rein Upper Radiator Hose - E60, E63, E64
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592004
Part#: 17127540665
Ships in 1 Business Day
$ 79.99 USD
Free Shipping
Add to Wish List
$ 79.99 USD
Free Shipping
Add to Wish List
Connects water pump to radiator
OEM Rein Coolant Expansion Tank Return Hose - E60 E63
OEM Rein Coolant Expansion Tank Return Hose - E60 E63
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:19545
Part#: 17127545653
In Stock at Vendor
$ 53.99

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

$ 52.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 52.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This is the coolant reservoir expansion tank return hose that connects to the bottom of the expansion tank. 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. ​

This item fits the following BMWs:
2004-2010 E60 BMW 545i 550i
2004-2010 E63 BMW 645ci 650i
Show More Show Less
Expansion Tank Vent Hose
Expansion Tank Vent Hose
For vehicles with production date up to 07/2004
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591986
Part#: 17127519247
Ships in 3 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
With quick connect coupling
Expansion Tank Vent Pipe
Expansion Tank Vent Pipe
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:402415
Part#: 17127521775
In Stock at Vendor
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your cracked and leaking hose with this replacement from Rein
Upper Radiator Hose
Upper Radiator Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:377397
Part#: 17127519248
Ships in 1 Business Day
$ 93.99 USD
Free Shipping
Add to Wish List
$ 93.99 USD
Free Shipping
Add to Wish List
Attaches to the water pump
Rein Water Pump Return Hose - E60, E63, E64
Rein Water Pump Return Hose - E60, E63, E64
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592005
Part#: 17127540667
Ships in 3 Business Days
$ 26.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 26.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Hose that pulls water from the water pump and disperses it to your engine
MMX 90mm Billet Coolant Expansion Tank Cap | BMW
MMX 90mm Billet Coolant Expansion Tank Cap | BMW
MMX Performance - Corporate Logo
T#:29002094
Part#: MMR03-1502
Ships in 2 Business Days
$ 127.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 127.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The MMX Performance 90mm billet coolant expansion cap for BMWs has been designed from the ground up in the UK, from a solid piece of billet aluminum. Each cap was designed to directly replace the OE cap, not merely stuck in place. Fitment is for models with the matching OE (17 11 7 639 021) part number.
Show More Show Less
Coolant Hose
Coolant Hose
For vehicles with automatic transmission only
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379793
Part#: 17127534918
In Stock at Vendor
$ 90.99 USD
Free Shipping
Add to Wish List
$ 90.99 USD
Free Shipping
Add to Wish List
From water pump to radiator
Radiator Vent Hose
Radiator Vent Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592001
Part#: 17127534917
Ships in 1 day
$ 38.23 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 38.23 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your cracked & leaking hose
Rein Expansion Tank Cap
Rein Expansion Tank Cap
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:384807
Part#: 17117639021
In Stock
$ 16.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 16.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Cap for plastic expansion tank
Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53
Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53 ...
Bremmen Parts - Corporate Logo
T#:640141
Part#: 13621433077
In Stock
Sale - Save 20% $ 20.99

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

$ 16.79 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 20%
$ 20.99

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

$ 16.79 USD
Free Shipping on orders $49 and up
Add to Wish List
The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary
Coolant Hose
Coolant Hose
For vehicles with production date from 07/2004
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:393277
Part#: 17127542540
In Stock
$ 51.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 51.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Attaches to the vent port on the expansion tank
Rein Cooling O-Ring - E53, E60, E63, E64, E65, E66, E70
Rein Cooling O-Ring - E53, E60, E63, E64, E65, E66, E70
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
Add to Wish List
$ 4.07 USD
Free Shipping on orders $49 and up
Add to Wish List
Seals the rear of the water transfer pipe to the block
Rein Coolant Expansion Tank - E60, E61, E63, E64
Rein Coolant Expansion Tank - E60, E61, E63, E64
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:402160
Part#: 17137542986
Ships in 1 Business Day
$ 82.99 USD
Free Shipping
Add to Wish List
$ 82.99 USD
Free Shipping
Add to Wish List
Includes fluid level sensor
OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66
OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66
Rein - Corporate Logo
T#:45791754
Part#: 17127508011R
Ships in 3 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 35.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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
Cool Retrun Hose
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
Add to Wish List
$ 80.99 USD
Free Shipping
Add to Wish List
Connects to the radiator
Coolant Hose
Coolant Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591989
Part#: 17127519254
In Stock at Vendor
$ 48.18 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 48.18 USD
Free Shipping on orders $49 and up
Add to Wish List
Attaches to the vent port on the expansion tank
OEM Rein Coolant Hose w/ Temperature Sensor - BMW E60 E63/E64 E65/E66
OEM Rein Coolant Hose w/ Temperature Sensor - BMW E60 E63/E64 E65/E66...
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
Add to Wish List
$ 75.99 USD
Free Shipping
Add to Wish List
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
Bremmen Parts Radiator Cooling Fan Assembly - E60, E61, E63, E64, E65, E66
Bremmen Parts Radiator Cooling Fan Assembly - E60, E61, E63, E64, E65...
Bremmen Parts - Corporate Logo
T#:1195937
Part#: 17427543282
Ships in 1 day
Sale - Save 5% $ 722.15

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

$ 686.04 USD
Free Shipping
Add to Wish List
Sale - Save 5%
$ 722.15

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

$ 686.04 USD
Free Shipping
Add to Wish List
Cooling fan with housing
Thermostat - 105C
Thermostat - 105C
Bremmen Parts - Corporate Logo
T#:15511827
Part#: 11537502779
Ships on Aug 13, 2026
Sale - Save 3% $ 46.99

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

$ 45.58 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 3%
$ 46.99

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

$ 45.58 USD
Free Shipping on orders $49 and up
Add to Wish List
If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.
Show More Show Less
New Water Pump - With O-Ring - Metal Impellar
New Water Pump - With O-Ring - Metal Impellar
Bremmen Parts - Corporate Logo
T#:56074199
Part#: 11517838201
Ships on Nov 19, 2026
New Item
$ 99.99 USD
Add to Wish List
$ 99.99 USD
Add to Wish List
Rein Coolant Return Pipe - N62 N73
Rein Coolant Return Pipe - N62 N73
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
Add to Wish List
$ 14.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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
BMW Expansion Tank With Cap
BMW Expansion Tank With Cap
Rein - Corporate Logo
T#:46616010
Part#: EPK0128
Ships in 3 Business Days
$ 86.99

This product was last offered at the strikethrough price on
04-28-2026

$ 74.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 74.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The coolant expansion tank acts as a reservoir for excess coolant as it expands and contracts with temperature changes. Over time, the constant exposure to extreme heat cycles can cause the tank to crack, break, or suffer damage to its nipples or mounting points. To keep coolant properly contained within the system, a damaged tank should be replaced promptly.
Show More Show Less
Meistersatz Temperature Sensor
Meistersatz Temperature Sensor
Meistersatz - Corporate Logo
T#:379740
Part#: 13621433076
Ships in 3 Business Days
$ 15.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 15.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Monitors coolant / oil temperature

Select Vehicle

BMW Mini
Clear Vehicle

Purpose

Category

Brand

Price

$
$

Special Offers

Shipping