Always connect a BMW-approved battery charger/power supply when performing programming.
This bulletin applies to 2018 BMW F22, F23, F30, F31, F32, F33, F34, F36, G01, G12, G30 and G32 vehicles.
The engine may run rough or hesitate when accelerating from a stationary position. Fault code FC 21A02D (combustion control, valve lift correction when at idle) may be stored in the DME memory.
A software error in the DME (digital motor electronics) may be the cause. Update the vehicle software using ISTA 4.27.10 or higher. Always connect a BMW-approved battery charger/power supply when performing programming.
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