Remove the seat.
Remove right side trim panel.
Disengage fuel tank.
Seal the fuel feed and return lines with hose clips, BMW # 13 0 010, and disconnect.
Disconnect breather lines.
Disconnect plug for fuel pump.
Remove fuel tank.
Caution! Switch off ignition. Disconnect ground (earth) cable from battery and insulate it.
Disconnect plug from Hall sensor.
Remove fasteners and lift out the Motronic control unit.
Remove the ignition coil.
Disconnect plug.
Disconnect ignition lead.
Remove spark plug cover (4).
Pull off spark plug cap with special puller, BMW # 123520.
Remove ignition leads.
Installation is the reverse of the removal procedure.
Switch on the ignition.
Without starting the engine, fully open the throttle once or twice so that the Motronic control unit can register the throttle-valve positions.
Note:
- Disconnecting the battery deletes all entries (e.g. faults, settings) stored in the Motronic control unit's memory.
- Loss of settings can temporarily impair the operating characteristics when the engine is restarted.
Checking ignition coil resistance
Test with BMW MoDiTeC.