Home
Cooling

BMW Cooling System Parts & Accessories for BMW 6 Series E63 (2004-2010)

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:

Bav Auto Coolant Expansion Tank - E60 E61 E63 E64 M54 N52 N62 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640491

Part#: 17137542986

Special Order: No Guaranteed ETA

Sale - Save 10% $ 54.99

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

$ 49.49 USD

Add to Wish List

Qty

Sale - Save 10%

$ 54.99

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

$ 49.49 USD

Add to Wish List

This Bav Auto cooling system expansion tank/coolant reservoir is a direct replacement for the factory unit. Replace your cracked or leaking radiator expansion tank today. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

BMW Heater Control Valve

We Price Match - Give Us A Call or Chat!

T#:16907152

Part#: 64110301939

Special Order: No Guaranteed ETA

$ 199.99 USD

Add to Wish List

Qty

$ 199.99 USD

Add to Wish List

This valve controls the flow of the coolant into the heater core, which allows warm air to be pushed through the HVAC system.

Auxiliary Fan Switch

2X Entries Into Our F80 M3 Sweepstakes

T#:376847

Part#: 13621433077

Ships in 1 Business Day

$ 10.99 USD

Add to Wish List

Qty

$ 10.99 USD

Add to Wish List

Comes with related o-ring

Rein Coolant Return Pipe - N62 N73

2X Entries Into Our F80 M3 Sweepstakes

T#:386411

Part#: 11511439976

Back Ordered

Sale - Save 11% $ 14.99

This product was last offered at the strikethrough price on
08-13-2026

$ 13.29 USD

Add to Wish List

Qty

Sale - Save 11%

$ 14.99

This product was last offered at the strikethrough price on
08-13-2026

$ 13.29 USD

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

2X Entries Into Our F80 M3 Sweepstakes

T#:46616010

Part#: EPK0128

Back Ordered

Sale - Save 19% $ 86.99

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

$ 70.50 USD

Add to Wish List

Qty

Sale - Save 19%

$ 86.99

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

$ 70.50 USD

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

T#:379740

Part#: 13621433076

In Stock at Vendor

$ 15.99 USD

Add to Wish List

Qty

$ 15.99 USD

Add to Wish List

Monitors coolant / oil temperature

Spirolox Clip

2X Entries Into Our F80 M3 Sweepstakes

T#:55821687

Part#: 111414399753

Ships in 1 Business Day

$ 9.99 USD

Add to Wish List

Qty

$ 9.99 USD

Add to Wish List

The ÜRO Parts Spirolox Clip provides the heavy-duty reliability your European vehicle demands, eliminating the structural weak links caused by fatigued or distorted factory hardware.

Project Cars

SELECT YOUR BMW

BMW Cooling System Parts & Accessories for BMW 6 Series E63 (2004-2010)

Sub-Categories

Bav Auto Coolant Expansion Tank - E60 E61 E63 E64 M54 N52 N62 ...

BMW Heater Control Valve

Auxiliary Fan Switch

Rein Coolant Return Pipe - N62 N73

BMW Expansion Tank With Cap

Meistersatz Temperature Sensor

Spirolox Clip

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results