Description
Electric central locking lock for the right rear door for CITROËN C4 II. Rear door behind the front passenger.
This electric central locking lock is a direct replacement for the right rear (passenger-side) door on Citroën C4 II models. Supplied with OEM references 9685352080 and 9138AH, it restores remote and central locking functions, secures the door latch and ensures reliable locking/unlocking when operated from the key fob, door switches or the vehicle’s central locking system. The unit is intended for technicians and DIY enthusiasts who need an exact-fit solution for a worn or failed door lock mechanism.
Function And Benefits
The unit combines an electric actuator and mechanical latch to lock and unlock the door. When the central locking system is activated, the actuator drives the latch mechanism to engage or release the striker. A fully functioning lock ensures door security, correct closure detection for interior warnings and safe operation of child locks and door ajar sensors.
Replacement Procedure
- Prepare: Park on a level surface, put the vehicle in P/neutral and remove the key from ignition.
- Safety: Disconnect the negative battery terminal before starting to avoid short circuits and accidental locking events.
- Door Trim: Remove interior door trim and any plastic clips or screws to access the inner door panel. Carefully peel back the moisture barrier.
- Disconnect: Unplug the electrical connector to the lock actuator and remove any actuator-to-latch linkages or rods.
- Unbolt: Remove the bolts securing the lock assembly to the door and withdraw the old unit through the service aperture.
- Install: Fit the new lock assembly, secure bolts to the manufacturer’s torque where specified, reconnect linkages and the electrical connector, and reseal the moisture barrier.
- Test: Reconnect the battery, test locking/unlocking with the key fob and interior switches, and verify door latches and child lock operation. Refit door trim.
Typical Service Life And Failure Symptoms
Service life varies with usage and environment. Common symptoms of a failing door lock include intermittent locking/unlocking, noisy or slow actuator movement, door not latching reliably, or electrical fault codes related to door switches. Many locks begin to show problems after several years or high mileage, especially in vehicles exposed to moisture, road salt or physical damage.
Why This Part Most Often Fails
- Water Ingress And Corrosion: Moisture inside the door can cause corrosion of mechanical parts and electrical contacts, leading to seizure or poor electrical connection.
- Worn Motor Or Gears: Plastic gears inside the actuator can wear or break over time, resulting in slipping or no movement.
- Connector Or Wiring Issues: Corroded or damaged connectors and wires cause intermittent function or complete failure.
- Mechanical Impact: Door collisions or forced entry attempts can deform the latch mechanism or damage internal components.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 II (Second Generation) – Right Rear Door (Passenger Side)
- Product Codes: 9685352080, 9138AH
- Other Numbers: Alternative OEM cross-references within Stellantis parts catalog may apply
Mounting Recommendations
- Always disconnect the battery before starting work to prevent short circuits and accidental locking events.
- Use appropriate trim removal tools to avoid damaging door panels. Keep fasteners and clips organized for reassembly.
- Check and, if necessary, lubricate the latch striker and moving parts with a suitable grease to reduce wear and noise.
- After installation, perform several lock/unlock cycles and verify that the door closes and latches smoothly. Adjust striker alignment if necessary.
- If electrical faults persist after replacement, inspect wiring harness and connectors for corrosion or damage.
Notes For Purchase
This part is commonly searched by its product numbers 9685352080 and 9138AH—entering these references will help you find the correct item quickly. Ideal for workshops and experienced DIYers replacing a worn or failed right rear door lock on Citroën C4 II vehicles.
