Description
Electric central locking actuator for the right rear door for Citroën C4 5‑door vehicles. Door behind the front passenger.
The right rear door electric lock (central locking actuator) is a direct replacement part for Citroën C4 5‑door models and is frequently searched by OEM part numbers. Designed for professional workshops and experienced DIYers, this unit restores reliable locking and unlocking of the passenger‑side rear door. It is compatible with original mounting points and electrical connectors found on Stellantis vehicles and is ideal when the door fails to lock or unlock with the central locking system or the key fob.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 5‑door — Right Rear Door (Passenger Side Rear)
- Product Codes: 9647175080, 9681336880, 9660700280
- Additional Numbers: 9138F2, 9138T5, 9138N4
Function
The actuator converts electrical central‑locking commands into mechanical movement to operate the door lock rod and latch. Inside is a small DC motor, gearbox and linkage that pull or push the locking mechanism when the vehicle sends a lock/unlock signal. Proper operation is essential for central locking, child locks (if present) and for the door to reliably latch closed.
How To Replace
- Preparation: Park on a level surface and disconnect the negative battery terminal before starting work to avoid short circuits and unintended actuator movement.
- Remove Interior Trim: Use plastic trim tools to remove the door card and clips without damage. Carefully peel back the moisture/vapor barrier to access the inner door shell.
- Access Actuator: Locate the actuator at the rear section of the door latch assembly. Disconnect the electrical connector and any retaining clips on the linkage rod.
- Remove Unit: Unscrew the actuator fasteners (typically screws/bolts) and extract the unit from the latch assembly.
- Install Replacement: Fit the new actuator, reconnect linkage and electrical connector, and secure all fasteners. Ensure linkages move freely and are correctly seated.
- Test Before Reassembly: Reconnect the battery temporarily and test lock/unlock operation from both the key fob and the interior switch. Verify smooth movement and correct locking/latching.
- Reassemble Door: Refit the moisture barrier and door card, ensuring all clips and seals are restored to prevent water ingress.
Installation Recommendations
- Always disconnect the battery before starting removal or installation to prevent electrical damage or short circuits.
- Use plastic trim tools to avoid damaging door panels and retainers.
- Inspect the electrical connector for corrosion and clean contacts if necessary; poor contact is a common fault source.
- Check the moisture barrier and door drainage; reseal properly to prevent future water ingress to the actuator.
- Test the new actuator fully (lock/unlock cycles) before reinstalling the door card to confirm correct operation.
Why The Part Most Commonly Fails
- Water Ingress: Moisture entering the actuator causes corrosion or gear degradation.
- Plastic Gear Wear: Internal plastic gears and small components can wear or strip over time, causing loss of movement.
- Connector Corrosion Or Wiring Faults: Oxidised pins or damaged wiring can interrupt power to the motor.
- Mechanical Stress Or Impact: Door impacts or repeated forced operation can bend linkages or damage the actuator.
- Motor Burnout: The small DC motor can fail after extended use or electrical overload.
Compatibility And Search Tips
Customers and technicians commonly search using the OEM part numbers listed above. Confirm the replacement is for the right rear (passenger rear) door on Citroën C4 5‑door vehicles. Check the part numbers stamped on the original unit before purchase to ensure exact match with your vehicle’s latch layout and connector type.
