Description
Electric central locking actuator for the right rear door of CITROËN C4 II vehicles (rear passenger side).
This electric door lock (central locking actuator) is designed for the right rear door of the Citroën C4 II and is commonly searched by OE numbers such as 9685352080 and 9685351480 or reference suffixes 9138AH / 9136GR. It replaces a worn or failed locking motor/latch assembly and restores reliable remote and central locking operation. Ideal for professional workshops and experienced DIY mechanics, the unit fits the rear passenger side door and is a frequent replacement on higher-mileage C4 II cars where door operation has become intermittent, noisy, or completely non-functional.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 II (Second Generation)
- Product Codes: 9685352080, 9685351480
- Additional Numbers: 9138AH, 9136GR
- Position: Right Rear Door (Rear Passenger Side)
Function
The unit combines an electric motor and latch mechanism to lock and unlock the right rear door as part of the vehicle’s central locking system. It receives signals from the lock/unlock command (remote key, door switch, or body control module) and moves the latch and locking rods accordingly. Proper function ensures secure door closure, correct operation of child locks, and synchronized central locking across all doors.
Installation Recommendations
- Safety First: Disconnect the negative battery terminal before starting to prevent short circuits and unintended central locking activation.
- Access: Remove the inner door trim panel carefully—start by dropping the window switch bezel and removing visible screws, then release retaining clips with a trim tool to avoid damage.
- Disconnect Wiring: Unplug the electrical connector to the actuator and, if present, remove any moisture barriers without tearing them excessively.
- Removal: Unscrew the actuator/latch fastenings and detach any linkage rods or clips. Note the routing and orientation of rods for reassembly.
- Installation: Fit the new actuator in the correct position, reconnect rods and clips, fasten mounting screws to specified torque if available, and reconnect the electrical connector. Test lock/unlock operation before reattaching the door trim.
- Final Checks: Verify central locking operation from the remote and interior switches, ensure the door closes and latches smoothly, and check for any abnormal noises or binding.
- Good Practice: Apply a small amount of dielectric grease to electrical connectors and lubricate mechanical linkages with appropriate light grease to prolong service life.
Why This Part Commonly Fails
Failures are usually caused by water ingress and corrosion, worn electric motor brushes or internal gears, plastic gear degradation, or broken linkage clips. Repeated heavy use, forced door operation, and accumulation of dirt or rust within the latch assembly accelerate wear. Electrical connector corrosion or damaged wiring can also cause intermittent or total loss of function.
Symptoms Indicating Replacement Is Needed
- Door does not lock or unlock with central locking or remote control.
- Intermittent operation—sometimes works, sometimes not.
- Unusual grinding or clicking noises from the door when operating locks.
- Door does not latch properly or requires manual assistance to close.
Replacing the faulty actuator restores full central locking functionality and improves security and convenience. Use the OE numbers listed above (e.g. 9685352080, 9685351480, 9138AH, 9136GR) when searching for the correct replacement part to ensure fitment for the Citroën C4 II right rear door.
