Description
Electric central locking lock for the right front door for Citroën C4 5-door first series. Passenger door.
Overview
This electric door lock (door lock actuator) is designed for the right front (passenger) door of the Citroën C4 5-door first series. It is a direct-fit replacement part commonly searched by its product numbers and is intended for vehicles equipped with central locking. Ideal for auto technicians and experienced DIYers who perform door repairs and central locking diagnostics.
Function
The unit operates the door latch and locking mechanism as part of the vehicle’s central locking system. When actuated by the key fob, door switch or body control module, the actuator moves the latch and lock rods to lock or unlock the door. Typical components inside the unit include a small electric motor, gearing, and an internal linkage that translates rotary motion into linear movement of the latch.
How To Replace
- Prepare Tools: Trim removal tools, Torx/Screwdriver set, socket set, multimeter.
- Safety First: Disconnect the negative battery terminal before starting to avoid short circuits and accidental airbag deployment.
- Remove Door Trim: Carefully pry off door trim and remove water barrier to access the lock assembly.
- Disconnect: Unplug electrical connector and detach lock rods/linkages from the actuator (note positions for reassembly).
- Replace Unit: Unbolt the old lock, fit the new unit in the same orientation, reconnect linkages and electrical plug.
- Test Operation: Reconnect battery, test locking/unlocking with key fob and interior switches before reassembling trim. Refit trim and sealing components after confirmation.
Installation Recommendations
Use correct trim tools to avoid damaging clips and panels. Mark linkage positions or take photos before disassembly to ensure proper reassembly. Check and, if necessary, lubricate rod joints and latch points with appropriate light grease. Inspect wiring and connector for corrosion or broken pins; if wiring is damaged, repair before installing the new lock. After installation, verify central locking function on all doors and ensure mechanical free movement of the latch.
Most Common Failure Reasons
- Mechanical Wear: Internal gears or plastic components wear or break over time, causing the actuator to slip or fail to move the latch.
- Water Ingress and Corrosion: Moisture entering the door can corrode contacts or motors and seize mechanical parts.
- Electrical Issues: Broken wires, poor connectors, or blown fuses in the central locking circuit can mimic actuator failure.
- Motor Burnout: The small DC motor inside the actuator can burn out after repeated use or when stalled by a seized latch.
Technical Information
Manufacturer: Stellantis / Citroën
Model: Citroën C4 (5-door, First Series)
Product Codes: 9686719780, 9683415980
Other Numbers: 9136ES
Notes for Professionals
When diagnosing central locking faults, verify power and ground at the actuator connector and check for continuity in the control wiring. If replacing only the actuator, ensure the latch mechanism itself is free and not obstructed. For vehicles with recurring moisture problems, address door seal and drainage issues to prevent repeat failures.
