Power

[peter1loftin]

can some one help please my 318is is down on power its been on the computer and they say it is the o2 sensor so i had it changed fuel econemy is a lot better now but its still down on power it drives like a 1.1 escort could it be a miss fire if so how can i fix it all the garages around here dont have a clue whats up with it i have changed the spark plugs put a induction filter and changed the fuel filter dont know what else to do.....

[dutchbmw]

The air mass sensor could be the cause if I'm not wrong.....