Older BMWs utilize a mechanical clutch fan from the factory. If your vehicle still has a clutch fan, you can validate its functionality with the 'newspaper test,' but we recommend our customers do a clutch fan delete, adding in an electronic fan to avoid sending a plastic fan blade through your hood. Alternatively, we do offer factory replacement parts for your clutch fan if you would like to keep your vehicle as BMW intended it.
The fan clutch adjusts the speed of the fan based on the rotational speed of the engine. When unneeded, the fan clutch reduces rotational load and drag. If you have a mechanical fan and your vehicle runs a little hotter than it should in traffic, this may be your solution.
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