I am new to this forum but not to BMWs. I have a 2001 X5 3.0 with 91k miles on it. Over the last six months I have replaced all four sensors with hopes that I finally had the solution.
About two months ago I had a technician tell me that I need to replace a computer board if I am remembering that correctly or have it rebuilt.
I bought the vehicle as a certified vehicle with 32k on it and it has run like a charm. It has always been serviced by BMW except the last 20k and even that was serviced by a BMW guy just not at a dealership.
The "Service Engine Soon" light now goes off and on and it is driving me crazy because the car seems to be running fine. My concern is that it is on for a reason and I need to figure that out without going broke. Fix it or cut bait. I figured there has got to be somebody in this forum that could shed this light!