Humberlea Lock ExpertsBulletin 3 of 3Toronto, Ontario
Vehicle Lock Repair: before you call
Pressing the remote locks three doors with a solid clunk and leaves the rear passenger door untouched, every single time.

Pressing the remote locks three doors with a solid clunk and leaves the rear passenger door untouched, every single time. A twist of the key still opens that door by hand, so the fault is sitting somewhere between the remote and that one lock.
Worth answering before the call
Is the vehicle reachable and stationary right now, wherever it is parked? Which lock is affected: a door, the trunk or hatch, or a storage compartment? Would you like a spare key or fob cut during the same visit?
Can a vehicle lock be repaired without replacing the whole mechanism?
In many cases, yes. A locksmith opens the trim panel, tests the cylinder, the linkage and the actuator separately, and repairs or replaces only the part that has actually failed. A slipped linkage rod, for example, is often reclipped rather than replaced outright.
How does a locksmith reach the actuator or linkage inside my door?
The interior trim panel is removed using tools shaped to release its retaining clips without marking the panel. On many doors that exposes the cylinder, the linkage rod and the power actuator for individual testing and repair, though some doors keep a carrier plate, water shield or window guide in the way, or use an integrated latch and actuator assembly, and are worked on accordingly.