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Mahle-Behr BMW Cooling System Parts & Accessories for BMW E39 M5 S62 5.0L

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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E39 M5 00-03 OEM Behr Radiator

T#:1341

Part#: 17111436062

In Stock at Vendor

$ 327.54

This product was last offered at the strikethrough price on
08-14-2026

$ 314.94 USD

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$ 314.94 USD

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OEM BEHR brand replacement radiator for all E39 M5, as produced in 2000, 2001, 2002 and 2003. This radiator is made by BEHR, an original equipment supplier to BMW. BEHR radiators are what we use our own BMWs and customer installs. We've found the BEHR radiator has the highest lifespan, least amount of manufacturing defects, and best continued cooling performance on the E39 M5. Simply put, you do not want anything else in your M5 but a BEHR brand radiator.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This BEHR radiator fits the following BMWs:
2000-2003 E39 M5 sedan

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OEM Mahle-Behr Fan Clutch - E39 M5, Z8

T#:373957

Part#: 11527830486

Ships in 2 Business Days

$ 366.02

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

$ 359.97 USD

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$ 359.97 USD

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This OEM Mahle-Behr fan clutch is a direct replacement for your original fan clutch. Has your fan clutch failed or is beginning to fail? A failing fan clutch will cause the engine fan to either not turn at all, or to turn very slowly and lifelessly, providing insufficient cooling for the radiator (especially noticeable while idling or in stop/go traffic).

This item fits the following BMWs:
1998-2003 E39 BMW M5
2000-2003 E52 BMW Z8 Roadster

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Electric Auxiliary Fan - E39 1999-2003

T#:377040

Part#: 64546921395

In Stock at Vendor

$ 416.64

This product was last offered at the strikethrough price on
03-09-2026

$ 393.29 USD

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$ 393.29 USD

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This electric auxiliary fan for BMW E39 525i 528i 530i 540i M5 1999-2003 mounts in front of the radiator and is designed to push air through the A/C Condenser and main radiator. It provides additional cooling for when the car is in traffic. It is a common failure item. If your engine temps are creeping up or if your A/C isn't blowing cold this could be the cause.

This item fits the following BMWs:
1999-2003 E39 BMW 525i 528i 530i 540i M5

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Mahle-Behr BMW Cooling System Parts & Accessories for BMW E39 M5 S62 5.0L

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E39 M5 00-03 OEM Behr Radiator

OEM Mahle-Behr Fan Clutch - E39 M5, Z8

Electric Auxiliary Fan - E39 1999-2003

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