Originally Posted by Manolito
I believe that you will find a chassis ground beneath the computer connector on the passenger side wheel well. I traced a ground problem on one of my '97s to this connection, and I found that ground to be corroded on both my '97s. There should also an engine-to chassis ground strap around the passenger side engine mount. It takes a lot of splashing so I would remove and clean that as well.
Thanks for getting me started to look in the area. I looked underneath my passenger side for the engine to chasis and saw a ground wire. On my car, the ground wire looked good and it was tight.
I took out my alternator and found that there was a ground wire on it, but it was "naked", meaning it didn't have a rubber coating around it. The ground wire was awfully corroded. I made a new ground wire using 8 guage wire and I believe this has cured my problem. I will know if a week or so if it was a truly a permanent fix.
My 1st BMW and I'm learning!