it also hesitated "bucks and surges"on pulling away from a stop or on acceleration from 20-40mph. I have had the car in 3 time to the BMW dealer, they have had it almost 4 week so far this year. All tires, injectors, spark plugs, coil wires,air mass sensor, replaced. I was told this has happened to this engine (4.4 liter)and an Open Campaign called E7X FOX F1X N63 on the repair order is the code used for this repair. I was told it is not a recall.