Hi I have a 1999 s3 that has been re-mapped to 290bhp. A few months down the line, the car begun to jerk so I was advised to replace the maff. I brought a brand new one from audi and gave them the old one. The car still jerks! the remap was done by the previous owner and I am no longer in contact with him. I now believe that the previous maff was not a bosch audi make. Can anyone please help me out this dilemma and tell me how I can now obtain the correct maff for this car??? or which air mass meter will be compatible with the power of this car????