Description
Electric central locking actuator for the right rear door of CITROËN C4 II — passenger-side rear door.
This replacement electric lock (central locking actuator) is designed for the right rear (passenger-side) door of the Citroën C4 II. It operates the door latch and integrates with the vehicle’s central locking system to lock and unlock the door electrically. Commonly searched by OEM and aftermarket codes, this unit is suitable for technicians and experienced DIYers who need a direct-fit solution for faulty rear door locking on Citroën C4 II models.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 II — Right Rear Door (Passenger-Side)
- Product Codes: 9685352080, 9138AH, 9685351480, 9136GR
- Other Numbers: 9685351480, 9685352080, 9136GR, 9138AH
Function and Application
The actuator is an electrically driven lock mechanism that moves the door latch between locked and unlocked positions when the central locking system is activated. It connects to the vehicle wiring harness and receives a 12 V signal from the vehicle’s central locking control. Proper operation ensures secure door closure and reliable remote locking/unlocking from the vehicle key fob or interior switches.
Installation Recommendations
- Disconnect the negative battery terminal before starting work to avoid short circuits.
- Remove the inner door panel and protective moisture barrier to access the lock assembly.
- Unplug the electrical connector and detach any rods or clips linking the actuator to the latch.
- Remove mounting screws/bolts securing the actuator, replace the unit, and reassemble in reverse order.
- Apply a small amount of dielectric grease to the connector contacts to reduce corrosion risk.
- After installation, check door locking/unlocking with the key fob and interior switches and ensure the latch engages smoothly before refitting the door card.
Most Common Failure Reasons
- Water ingress and corrosion of electrical contacts caused by damaged door seals or moisture penetration.
- Mechanical wear or broken plastic gears inside the actuator after years of use.
- Connector or wiring harness damage from door movement, pinch points, or rodent activity.
- Foreign objects or misaligned latch mechanisms increasing load on the actuator motor.
There is no fixed replacement interval; actuators typically fail after prolonged use, high mileage or long-term exposure to moisture and road salt. Replacing a faulty actuator restores reliable central locking and prevents issues such as a door that will not lock, unlock, or that intermittently operates.
This part is intended for professionals and skilled DIYers. If you value a direct-fit replacement that matches common OEM numbers for the Citroën C4 II right rear door, this actuator is a practical solution to restore proper locking function.
