Question about 1999 BMW M3
Congratulations on owing a great car. You will need to remove the negative battery cable. Let it set for 30 minutes - then reinstall. The good thing about your car is it can reset the computer just this easy. The bad news is if it doesn't you're going to have to take it to an authorized repair show. These cars are not ever made for the owner to do anything to them but drive them. Please - take down the vin number - drive the car to a local dealer and first ask about RECALLS -this could be a FREE FIX if it is a RECALL item. Many owners fix the dealer FREE repairs and never know it. You do not need to be the owner even on these RECALL fixes. It may be even a ne bad battery - I have seen it happen where a new battery was damaged at the factory. Also - have them check the alternator output as - like you say - it sounds electrical. In closing - The one thing to maintain here is to not make it worse and on BMW it can get worse in a hurry if you don't know exactly what you're doing. As a BMW factory mechanic I have to implore you to take it to a qualified repair shop.
Posted on May 06, 2010
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Posted on Jan 02, 2017
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