Description
Electric central locking lock for the right rear door of the Citroën C3, 6-pin.
This 6-pin electric door lock is designed for the right rear door of the Citroën C3 and provides reliable central locking operation for professional workshops and experienced DIYers. Ideal when the door fails to lock or unlock consistently, the unit replaces the internal latch and actuator assembly and restores smooth, secure door operation. Commonly referenced by product codes 46978180 and 9138C1, this part is searchable by those numbers for quick identification.
The lock houses the actuator motor and mechanical latch that interact with the central locking system. When fitted, it receives the lock/unlock signal via the 6-pin connector and moves the internal linkage to secure or release the door. Typical symptoms that indicate replacement are intermittent locking, audible grinding or whining from the door, inability to lock or unlock that specific door while other doors operate normally, or physical jamming of the latch.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C3 (Right Rear Door)
- Product Codes: 9138C1, 46978180
- Other Numbers: NFP
- Connector: 6-Pin Electrical Connector
Installation Recommendations
- Prepare Basic Tools: Phillips and Torx drivers, trim removal tools, pliers, and a small ratchet set.
- Safety First: Disconnect the negative battery terminal briefly to avoid short circuits while working on the electrical connector.
- Remove Door Trim: Carefully prise off the door card and remove any vapor barriers to access the lock assembly. Keep clips and screws organized.
- Disconnect Wiring: Unplug the 6-pin connector and detach any linkages or rods from the latch; note or photograph their positions to ensure correct reassembly.
- Replace Unit: Remove the old lock module, fit the new unit in the same orientation, reconnect linkages and the 6-pin connector, and secure mounting fasteners to original torque points.
- Function Check: Reconnect the battery, test central locking cycles and manual operation before refitting the door trim. Ensure the latch engages smoothly and that sensors or child locks function as expected.
- Final Steps: Apply light lubricant to moving parts if needed and reassemble the door panel, checking for rattle-free fitment.
Why This Part Fails Most Often
- Mechanical Wear: Repeated cycles lead to worn gears or plastic components inside the actuator and latch.
- Water Ingress And Corrosion: Moisture reaching the mechanism or connector causes corrosion and electrical faults.
- Electrical Connector Issues: Poor contact, damaged pins, or wiring harness faults cause intermittent operation.
- Impact Damage Or Misalignment: Door impacts or misaligned striker plates can overload the latch and cause premature failure.
- Poor Lubrication: Dry or contaminated moving parts increase friction and accelerate wear.
Searchable by its OE numbers 46978180 and 9138C1, this genuine-style 6-pin right rear door lock is a practical replacement to restore reliable central locking on Citroën C3 models. Compatible fitment should be confirmed against vehicle model and door side based on your vehicle specification prior to installation.
