Description
Electric central locking actuator for the right rear door Citroën C3. Rear door on the passenger side. 6 pins.
High-quality electric door lock (central locking actuator) designed for the right rear (passenger-side) door of Citroën C3. Ideal for professional workshops and skilled DIYers, this 6-pin actuator offers direct replacement for vehicles using OEM codes 9138C1 and 46977980. The actuator operates the latch and locking mechanism as part of the central locking system and is commonly searched by part number—use the codes below to confirm fitment. Compatible with many Stellantis Citroën C3 variants; suitable for restoring reliable locking function, eliminating intermittent locking, or replacing mechanically worn components.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C3 (Right Rear Door / Passenger Side)
- Product Codes: 9138C1, 46977980
- Other Numbers: 6-Pin Connector
Function
The electric actuator is part of the central locking system and controls the mechanical latch of the right rear door. When the central locking motor receives a signal, the actuator moves the lock rod to lock or unlock the door. It integrates an electric motor and gearbox assembly with electrical connections via a 6-pin plug.
Common Failure Causes
- Wear of internal gears (plastic gears can degrade over time), causing the actuator to lose drive or make grinding noises.
- Water ingress or corrosion inside the door affecting the motor or electrical contacts.
- Broken or detached linkage/rods between actuator and latch, producing incomplete locking action.
- Intermittent electrical faults such as damaged wiring, poor connector contact, or worn motor brushes.
- Mechanical fatigue due to frequent use or impact to the door/latch area.
Replacement / Installation Overview
Replacement is straightforward for experienced technicians and competent DIYers with basic tools. Typical procedure:
- Disconnect the negative terminal of the battery before starting work to avoid short circuits and accidental deployment of electrical systems.
- Remove the inner door trim and any vapor barriers to access the lock assembly and actuator.
- Disconnect the 6-pin electrical connector and unbolt the actuator from the door/latch assembly.
- Carefully detach the actuator linkage from the latch mechanism (note orientation for reassembly).
- Install the new actuator, reconnect the linkage and connector, and test the locking function before reassembling the door panel.
- Reinstall the door trim and check operation of central locking from key fob and internal switches.
Installation Recommendations
- Work on a dry vehicle; check door seals and drainage holes to reduce future water ingress.
- Inspect and, if necessary, lubricate mechanical linkages and latch points with appropriate grease.
- Clean the connector pins and ensure a secure, corrosion-free electrical connection.
- After installation, cycle the locking system several times and confirm that all doors lock/unlock correctly.
- Keep the original part numbers (9138C1, 46977980) handy to confirm fitment and avoid mismatches.
Why This Part Is Often Replaced
Door lock actuators are exposed to moisture, temperature changes, and frequent mechanical use, which over time leads to gear wear, motor failure, or corrosion. Symptoms prompting replacement include noisy operation, failure to lock/unlock from the central system, or the door remaining mechanically locked. Replacing the actuator restores reliable locking and passenger security.
Search by part numbers 9138C1 or 46977980 to find listings and confirm application. This unit is intended as a direct replacement for the right rear door of Citroën C3 models using the listed OEM codes.
