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Home >> BMW >> 2023 >> 330e xDrive >> Repair and Diagnosis >> Accessories & Equipment >> Heated Glass/Defoggers >> Body Equipment -- Repair (1 Of 2) (G20) >> 51 21 Door Locks, Handles, Fittings, Front >> 51 21 140 Removing and installing/replacing the complete lock cylinder on the left or right front door (330i, 330i xDrive, 330e PHEV, 330e xDrive PHEV, M340i and M340i xDrive) >> Replacing lock cylinder

Replacing lock cylinder

WARNING: Working on 12 V electrical system  .
Risk of short circuits! Risk of fire! 
  • Make sure that there is no charger  connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
NOTE: Description is for left component only. Procedure on the right side is identical.

Preliminary work 

G14643263Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work