Replacing throttle actuator motor with pics ↗
Owner photo thread on swapping an S85 throttle actuator: intake/airbox side off, unplug the actuator, three 10 mm bolts, then initialise the new unit with dealer-level software. Replies put it at a few hours and suggest doing both banks.
Tools mentioned: 10 mm socket, BMW diagnostic software (DIS/ISTA) for initialisation