Originally Posted by sonphan13
I'm having the same issue. Changed Sensor and still unable to reset the oil change mileage. Checked the wiring, didn't see anything.
So I ended up ha ding it over to BMW, the damage was pretty substantial. I had corrosion on the engine management chip caused by condensation running down the earthing cable (attached to the inner wing). Check the plugs/sockets on the harness for any blue corrosion.
It could be an issue with the alternator too just so you know.
It costs me £1600 to get new chip installed and reprogrammed at BMW
Hope this helps.