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BMW Cooling System Parts & Accessories for BMW Z Series E85/6 (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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OEM Style Hose Clamps

10X Entries Into Our F80 M3 Sweepstakes

T#:338927

Part#: HOSE-CLAMPS

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Sale - Save 3% $ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD

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Sale - Save 3%

$ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD

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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.

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Genuine BMW Radiator Support Bracket - E92 Z4 E65 E60 E53 E46 E66 E83...

T#:21736

Part#: 17117514402

Ships in 1-2 days

Sale - Save 8% $ 26.99

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

$ 24.86 USD

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$ 26.99

This product was last offered at the strikethrough price on
08-26-2026

$ 24.86 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E53 48IS,E46,E53 X5 X5,E65,E83 X3,E85 Z4,E86 Z4,E90,E92,E93

Genuine BMW Radiator Bracket - Lower - E46

T#:21734

Part#: 17111436264

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Sale - Save 10% $ 33.99

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

$ 30.54 USD

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Sale - Save 10%

$ 33.99

This product was last offered at the strikethrough price on
08-26-2026

$ 30.54 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E46,E85 Z4

Fits BMW Engines including:
M52,M54,M56,S54

Genuine BMW Coolant Hose - N52 3.0L

T#:360692

Part#: 11537521049

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Sale - Save 11% $ 73.99

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

$ 65.99 USD

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$ 73.99

This product was last offered at the strikethrough price on
07-16-2026

$ 65.99 USD

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This is a Genuine BMW coolant host that connects from the water pump to the thermostat. Replace your leaking coolant hose to prevent overheating issues and coolant loss.