My 2000 540 keeps dropping coils
Literally, within a week of having a coil replaced, the car will start missing in low gears and a few days later the "Service Engine Soon" light will come on. In a few cases, when the car is missing, it will flash at me.
Mechanic says I need to replace the third coil that has gone bad, but I am thinking there is something going on to cause the coils to fail. Each time it is a different coil and this time the coil is in the other bank.
He says he has never seen anything like this.
Have any of you? Any advice?