Hi, I wonder if anyone could give me some advice on this very strange problem, or whether anyone has had the same thing.
I have a 318i E46 automatic with 110,000 miles on it. I've had it two years and absolutely no problems with it, the car has been well serviced all its life and I am only the second owner.
The symptoms are, the car always starts first time and drives perfectly except that every now and then it seems as if the ignition has been switched off for maybe 1 second, just the battery light comes on, and as long as I have forward motion it comes back and the light goes out and everything is back to normal. The strange thing is this might happen a couple of times in a mile of driving say, and then not happen again for another 50 miles, it can happen twice in one day and then not happen for a week or so.
My local independent mechanic who has looked after my various cars for 20+ years has had his diagnostic equipment on the car and that is showing no error codes at all, it even happened in the workshop with the "magic box" connected and did not reveal an error code, so we are a bit stumped.
If anyone has had the same problem or has heard of the same problem I would really welcome you input.