[Perfectus]

I'm in the same predicament... I had my plugs replaced by the dealer under the warranty. It idled horribly and I gave it back to them. They found codes for 2 "faulty" spark plugs. They replaced them and the car is still idling rough but not has rough as it did after the initial replacement. My car is at 46k+ and never idled like this before. Even after the car has warmed up and been driven for an hour+ the idle is still rough. I gave it to them for a week and told them to fix it. They said its normal and couldn't find anything wrong, no codes, etc. They can't do anything without codes and I told them about the injectors, coil packs, etc...no action without any codes.

Should I contact BMWNA?