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

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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.

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Blackline Performance Chargecooler Coolant Tank Cap Cover - Red - BMW...

T#:641287

Part#: FXXCCT-R

In Stock

$ 52.00 USD

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$ 52.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Charge Cooler Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Charge Cooler Reservoir Cap Cover will fit most BMW vehicles equipped with the S55 and S63 engines with the charge cooler reservoir tank found in the following vehicles: F87 M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more. Check your coolant cap ensuring that it is the same shape as seen in the product photos. Each kit comes with a Billet Charge Cooler Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Titanium Coolant Bleeder Screw Upgrade

T#:38621407

Part#: BMS-TCBS

Back Ordered

$ 25.00 USD

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$ 25.00 USD

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Replace your fragile OEM plastic coolant bleeder screw, which is prone to cracking and failure, with a premium titanium upgrade built for strength and style under the hood. Factory plastic components weaken over time due to constant heat cycles, leading to brittleness and potential failure. Our titanium replacement delivers superior durability, being twice as strong as aluminum yet 45% lighter than steel, ensuring unmatched resilience and long-term reliability for your coolant system. More than an upgrade, it’s a must-have for engine longevity. CNC-machined from solid titanium, each screw features a laser-etched Burger Motorsports logo and is hand-burned to create unique color patterns—no two are alike. A heavy-duty replacement O-ring is included for a perfect fit.

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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

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Sale - Save 20%

$ 60.99

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

$ 48.79 USD

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

Blackline Performance Chargecooler Coolant Tank Cap Cover - Gray - BM...

T#:641290

Part#: FXXCCT

In Stock

$ 52.00 USD

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$ 52.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Charge Cooler Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Charge Cooler Reservoir Cap Cover will fit most BMW vehicles equipped with the S55 and S63 engines with the charge cooler reservoir tank found in the following vehicles: F87 M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more. Check your coolant cap ensuring that it is the same shape as seen in the product photos. Each kit comes with a Billet Charge Cooler Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

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Engine Block Cover - Rear

2X Entries Into Our F80 M3 Sweepstakes

T#:36235515

Part#: 11142446298

Ships in 2 Business Days

$ 464.99 USD

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$ 464.99 USD

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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

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URO Coolant Expansion Tank - E70

2X Entries Into Our F80 M3 Sweepstakes

T#:592016

Part#: 17137552546

Ships in 2 Business Days

$ 70.99 USD

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$ 70.99 USD

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Replace your cracked or faded tank

MMX 90mm Billet Coolant Expansion Tank Cap | BMW

T#:29002094

Part#: MMR03-1502

Ships in 3 Business Days

$ 127.99 USD

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$ 127.99 USD

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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.

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Auxiliary Fan Switch O-Ring

2X Entries Into Our F80 M3 Sweepstakes

T#:377077

Part#: 13621433077S

Ships in 2 Business Days

$ 0.88 USD

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$ 0.88 USD

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

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

2X Entries Into Our F80 M3 Sweepstakes

T#:50031902

Part#: 11537586885

In Stock

$ 74.99

This product was last offered at the strikethrough price on
08-24-2026

$ 59.99 USD

Limited Qty Sale

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$ 74.99

This product was last offered at the strikethrough price on
08-24-2026

$ 59.99 USD

Limited Qty Sale

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Provides optimal engine cooling performance.

Temperature Sensor

2X Entries Into Our F80 M3 Sweepstakes

T#:37892090

Part#: 13621433076

In Stock

$ 10.34 USD

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$ 10.34 USD

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Temperature sensor for monitoring coolant and oil

Expansion Tank Cap

2X Entries Into Our F80 M3 Sweepstakes

T#:373099

Part#: 17137516004

Ships in 2 Business Days

$ 15.99

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

$ 10.99 USD

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$ 10.99 USD

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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.

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OE Pierburg Auxiliary Water Pump - E70,E71,F15,F16

T#:639135

Part#: 64119230233

Ships on Oct 7, 2026

$ 184.99 USD

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$ 184.99 USD

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Genuine BMW Auxiliary Water Pump This item fits the following BMW Chassis: E70 X5M,E71 X6M,E70 X5,E71 X6,F15,F16

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

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Qty

Sale - Save 20%

$ 14.99

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

$ 11.99 USD

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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.

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Turbocharger Auxiliary Water Pump - BMW E70 X5M, E71 X6M S63 4.4L ...

T#:25109080

Part#: 11517629917

Special Order: No Guaranteed ETA

$ 104.99 USD

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$ 104.99 USD

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This auxiliary water pump provides coolant to your turbochargers to prevent them from overheating. Failure of this pump could result in damage to your turbos if not addressed immediately.

Auxiliary Water Pump

T#:22064619

Part#: 11517584088

Special Order: No Guaranteed ETA

$ 245.99 USD

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$ 245.99 USD

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Auxiliary Water Pump - This item fits the following BMW Chassis: F06,F10,F12,F13 Fits BMW Engines including: S63N

Auxiliary Fan Switch

2X Entries Into Our F80 M3 Sweepstakes

T#:376847

Part#: 13621433077

Back Ordered

$ 10.99 USD

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$ 10.99 USD

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