Home
Cooling

BMW Cooling System Parts & Accessories for BMW X5 M S63 4.4L

Clear BMW chassis

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 - With Level Sensor - E70 X5, E71 X6 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:638093

Part#: 17138621092

In Stock

Sale - Save 20% $ 60.99

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

$ 48.79 USD

Add to Wish List

Qty

Sale - Save 20%

$ 60.99

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

$ 48.79 USD

Add to Wish List

Replace your old expansion tank to prevent potential failure or leaks. Includes a brand new coolant level sensor.

Engine Block Cover - Rear

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!

T#:36235515

Part#: 11142446298

Ships in 1 Business Day

$ 464.99 USD

Add to Wish List

Qty

$ 464.99 USD

Add to Wish List

Details: Fitment guaranteed Replacement for cracked, or damaged engine block cover. Precisely manufactured to OE dimensions for exact fit and easy installation Durable high-quality materials are corrosion-resistant and withstand oil vapor and intense engine heat

Show More Show Less

URO Coolant Expansion Tank - 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!

T#:592016

Part#: 17137552546

Ships in 1 Business Day

$ 70.99 USD

Add to Wish List

Qty

$ 70.99 USD

Add to Wish List

Replace your cracked or faded tank

Water Valve

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!

T#:638778

Part#: 64116910544

Ships in 1 Business Day

$ 76.99 USD

Add to Wish List

Qty

$ 76.99 USD

Add to Wish List

URO Water Valve This item fits the following BMW Chassis: E70 X5M,E71 X6M,E53 48IS,E53 X5,E70 X5,E71 X6,F15,F16

Temperature Sensor

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!

T#:37892090

Part#: 13621433076

In Stock

$ 10.34 USD

Add to Wish List

Qty

$ 10.34 USD

Add to Wish List

Temperature sensor for monitoring coolant and oil

Auxiliary Fan Switch O-Ring

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!

T#:377077

Part#: 13621433077S

In Stock

$ 0.88 USD

Add to Wish List

Qty

$ 0.88 USD

Add to Wish List

Now you can just replace the o-ring instead of the whole switch

URO Thermostat Assembly - BMW E53 E6X E70 F10 F12 F13 F8X

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:50031902

Part#: 11537586885

In Stock

$ 77.88

This product was last offered at the strikethrough price on
03-08-2026

$ 74.99 USD

Add to Wish List

Qty

$ 74.99 USD

Add to Wish List

Provides optimal engine cooling performance.

Expansion Tank Cap

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!

T#:373099

Part#: 17137516004

Ships in 1 Business Day

$ 15.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD

Add to Wish List

Qty

$ 10.99 USD

Add to Wish List

The coolant expansion tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap.

Show More Show Less

Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:639833

Part#: 13621433076

In Stock

Sale - Save 20% $ 14.99

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

$ 11.99 USD

Add to Wish List

Qty

Sale - Save 20%

$ 14.99

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

$ 11.99 USD

Add to Wish List

This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. 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

Auxiliary Fan Switch

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!

T#:376847

Part#: 13621433077

Back Ordered

$ 10.99 USD

Add to Wish List

Qty

$ 10.99 USD

Add to Wish List

Comes with related o-ring

Select Vehicle

Purpose

Category

Home

Cooling

Brand

View All Brands

Price

Special Offers

Shipping