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:

Thermostat Replacement kit - 90C

10X Entries Into Our F80 M3 Sweepstakes

T#:15744051

Part#: 82142209769KT

In Stock

Sale - Save 3% $ 146.99

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

$ 142.74 USD

Add to Wish List

Qty

Sale - Save 3%

$ 146.99

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

$ 142.74 USD

Add to Wish List

Water Pump And Thermostat Kit - E70 E71 F01 F02 F06 F07 F10 F12 F13 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:554065

Part#: 11517548263KT3

In Stock

Sale - Save 31% $ 336.99

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

$ 232.61 USD

Add to Wish List

Qty

Sale - Save 31%

$ 336.99

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

$ 232.61 USD

Add to Wish List

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:

Thermostat
Water pump
Coolant

This item fits the following BMW Engines:
N63,N63N,S63,N62N

Show More Show Less

OEM Style Hose Clamps

10X Entries Into Our F80 M3 Sweepstakes

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

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

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

10X Entries Into Our F80 M3 Sweepstakes

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

Add to Wish List

Qty

Sale - Save 20%

$ 93.99

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

$ 75.06 USD

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

Schwaben Coolant Refill/Air Purge Tool

10X Entries Into Our F80 M3 Sweepstakes

T#:362940

Part#: 003466SCH01

Ships in 6 Business Days

Sale - Save 20% $ 109.99

This product was last offered at the strikethrough price on
05-02-2026

$ 87.99 USD

Add to Wish List

Qty

Sale - Save 20%

$ 109.99

This product was last offered at the strikethrough price on
05-02-2026

$ 87.99 USD

Add to Wish List

When it comes to BMW's we all know the weak point is commonly in the cooling system, many models proving hard to bleed the air pockets out after the refresh. The coolant refill tool solves this problem, ensuring that you get an air pocket free fill. The entire task is as simple as draining the system like normal, reinstalling the drain plugs and hooking the tool up to your refill location. The reason this tool works so well is due to the venturi valve, it converts air pressure from the compressor to vacuum inside the cooling system, then with a twist of a valve sucks coolant right into the system using the vacuum pressure.

Show More Show Less

Coolant Vacuum Purge & Refill Tool Set

10X Entries Into Our F80 M3 Sweepstakes

T#:402498

Part#: 024948SCH01A

In Stock

Sale - Save 25% $ 115.99

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

$ 86.99 USD

Add to Wish List

Qty

Sale - Save 25%

$ 115.99

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

$ 86.99 USD

Add to Wish List

The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.

Show More Show Less

Bav Auto Spill-Proof Coolant / Antifreeze Funnel

10X Entries Into Our F80 M3 Sweepstakes

T#:580395

Part#: B8800082

In Stock

Sale - Save 15% $ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD

Add to Wish List

Qty

Sale - Save 15%

$ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD

Add to Wish List

Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

10X Entries Into Our F80 M3 Sweepstakes

T#:580348

Part#: B8800019

In Stock

Sale - Save 20% $ 29.99

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

$ 23.99 USD

Add to Wish List

Qty

Sale - Save 20%

$ 29.99

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

$ 23.99 USD

Add to Wish List

Used to remove your fan clutch

Radiator / Cooling System Pressure Tester- Bavarian Autosport ...

10X Entries Into Our F80 M3 Sweepstakes

T#:580397

Part#: B8800084

In Stock

Sale - Save 15% $ 146.99

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

$ 124.94 USD

Add to Wish List

Qty

Sale - Save 15%

$ 146.99

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

$ 124.94 USD

Add to Wish List

Radiator Pressure Tester Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:391482

Part#: 014710SCH01A

In Stock

Sale - Save 25% $ 205.99

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

$ 154.49 USD

Add to Wish List

Qty

Sale - Save 25%

$ 205.99

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

$ 154.49 USD

Add to Wish List

Are you refreshing your coolant system or having issues with coolant loss? An easy way to test your system for leaks and ensure you're able to maintain pressure without coolant loss is the Schwaben Cooling System Pressure Tester Kit.

Show More Show Less

Schwaben Locking Hose Pinch-Off Pliers

10X Entries Into Our F80 M3 Sweepstakes

T#:379950

Part#: 009787SCH01A

In Stock

Sale - Save 15% $ 39.99

This product was last offered at the strikethrough price on
05-02-2026

$ 33.99 USD

Add to Wish List

Qty

Sale - Save 15%

$ 39.99

This product was last offered at the strikethrough price on
05-02-2026

$ 33.99 USD

Add to Wish List

Schwaben Locking Hose Pinch-Off Pliers have adequate clamping force to effectively seal large or pressurized cooling system hoses. These pliers are ideal for clamping shut most hoses, ensuring reliability in your automotive tasks. With swivel jaws, they provide even clamping force, making them a versatile tool for various applications.

Adequate clamping force for large or pressurized hoses
Ideal for clamping shut most hoses
Swivel jaws ensure even clamping force
Versatile tool for automotive maintenance

WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. For more information, visit http://www.p65warnings.ca.gov.

Show More Show Less

Water Heater Control Valve

10X Entries Into Our F80 M3 Sweepstakes

T#:3018052

Part#: 64116910544

In Stock

Sale - Save 20% $ 85.99

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

$ 68.54 USD

Add to Wish List

Qty

Sale - Save 20%

$ 85.99

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

$ 68.54 USD

Add to Wish List

Keep your HVAC system running properly with a new Water Heater Control Valve.

Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6 ...

10X Entries Into Our F80 M3 Sweepstakes

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.

Bav Auto Angled Hose Pinch Plier Set - 2pc

10X Entries Into Our F80 M3 Sweepstakes

T#:580379

Part#: B8800058

In Stock

Sale - Save 25% $ 32.99

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

$ 24.74 USD

Add to Wish List

Qty

Sale - Save 25%

$ 32.99

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

$ 24.74 USD

Add to Wish List

Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

Show More Show Less

Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53 ...

10X Entries Into Our F80 M3 Sweepstakes

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

Add to Wish List

Qty

Sale - Save 20%

$ 20.99

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

$ 16.79 USD

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

Schwaben Radiator/ Intercooler Fin Comb

10X Entries Into Our F80 M3 Sweepstakes

T#:384260

Part#: 015326SCH01A

In Stock

Sale - Save 29% $ 20.99

This product was last offered at the strikethrough price on
05-02-2026

$ 14.99 USD

Add to Wish List

Qty

Sale - Save 29%

$ 20.99

This product was last offered at the strikethrough price on
05-02-2026

$ 14.99 USD

Add to Wish List

Straighten bent fins in heat exchangers like radiators, condensers, and intercoolers obstruct air flow and reduce heat transfer. Paper-thin fins are easily bent, even by slight pressure.

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

10X Entries Into Our F80 M3 Sweepstakes

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

Select Vehicle

Purpose

Category

Home

Cooling

Brand

Price

Special Offers

Shipping