This bulletin applies to 2018 BMW vehicles equipped with B46, B58 and XB1H engines. The vehicle may run rough or hesitate when accelerating from a stationary position.
DTC FC 21A02D (combustion control: valve lift correction when at idle) may be stored in DME fault memory. This may be caused by a software error in the DME (digital motor electronics module). Update the vehicle software using ISTA 4.
Program the DME using ISTA 4. 10.20 or higher to integration level 18-03-520 or higher.