Jump Starting Your BMW

Jump-starting BMW vehicles should be avoided, as it may cause damage to certain electrical components. The electrical components found in BMWs (and most other cars) are designed to handle up to 15 volts for brief periods only. Jump-starting equipment found on some tow trucks operates at 18 volts or as high as 24 volts. Disconnecting the battery, then charging it, is the recommended alternative.

When jump-starting is the only option, you can take these steps to ensure the vehicle's electrical components are not damaged:

Remember, failure to follow these procedures may result in damage to sensitive electrical components. Damage is a virtual certainty if performed with equipment that delivers over 15 volts.

Taken from www.allbmwparts.com