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BMW Cooling System Parts & Accessories for BMW Z4 M Roadster S54 (2003-2008)

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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Water Pump & Thermostat Kit - BMW Z3 Z4 S54 3.2L

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T#:48194755

Part#: ZS54WPTKT2

Ships on Nov 23, 2026

$ 1,022.99 USD

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$ 1,022.99 USD

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It is important that your coolant system is serviced at regular intervals to ensure a long life. Over time, coolant systems are exposed to high temperatures and repeated thermal cycling, which causes warping, cracking, and hardening of plastics and rubber components in the coolant system. This can lead to coolant leaks and overheating, which can result in extensive engine damage if not resolved in a timely manner. This Water Pump & Thermostat kit helps to address a few of the most problematic parts, replacing these items entirely to keep your cooling system running optimally and efficiently.

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Bav Auto Spill-Proof Coolant / Antifreeze Funnel

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

T#:580395

Part#: B8800082

In Stock

Sale - Save 15% $ 32.99

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

$ 28.04 USD

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Sale - Save 15%

$ 32.99

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

$ 28.04 USD

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Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

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

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

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Sale - Save 20%

$ 29.99

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

$ 23.99 USD

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Used to remove your fan clutch

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

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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

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Sale - Save 15%

$ 146.99

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

$ 124.94 USD

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Bav Auto Fan Pulley Holder

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T#:580358

Part#: B8800031

In Stock

Sale - Save 15% $ 23.99

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

$ 20.39 USD

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Sale - Save 15%

$ 23.99

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

$ 20.39 USD

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Used to remove your fan clutch

AutoTecknic Dry Carbon Charge Cooler Tank Cap Cover - Gloss Finish ...

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

T#:39971051

Part#: BM-0032

In Stock

$ 64.99 USD

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$ 64.99 USD

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A premium dry carbon fiber engine bay upgrade that enhances the performance styling of compatible BMW models with a sleek, UV-resistant finish and easy OEM-style installation.

Bav Auto Angled Hose Pinch Plier Set - 2pc

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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

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Sale - Save 25%

$ 32.99

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

$ 24.74 USD

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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.

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BMW Cooling System Parts & Accessories for BMW Z4 M Roadster S54 (2003-2008)

Sub-Categories

Water Pump & Thermostat Kit - BMW Z3 Z4 S54 3.2L

Bav Auto Spill-Proof Coolant / Antifreeze Funnel

Bav Auto Fan Clutch Wrench - 32mm

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

Bav Auto Fan Pulley Holder

AutoTecknic Dry Carbon Charge Cooler Tank Cap Cover - Gloss Finish ...

Bav Auto Angled Hose Pinch Plier Set - 2pc

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