Description
Electric central locking lock for left front door for Citroën C4 5-door first series. Driver’s door.
Replace a faulty left front door central locking lock with a direct-fit electric unit designed for Citroën C4 5-door first series vehicles. This replacement lock restores reliable locking and unlocking via central locking, key or remote control, and secures the driver’s door against unwanted opening. Ideal for professional workshops and experienced DIYers who search by OEM part numbers such as 9681331680 or 9135Z5.
Function And Benefits
The unit combines the mechanical latch and the electric actuator that operate the central locking for the driver’s door. It converts signals from the central locking module into mechanical movement to lock or unlock the door and also provides the door-ajar monitoring contact. Installing a properly fitting lock eliminates intermittent locking faults, noisy or slow actuators and improves door security.
Typical Symptoms And When To Replace
- Door does not lock or unlock with central locking or key fob while other doors function normally.
- Intermittent operation: sometimes works after tapping the door or after several attempts.
- Loud grinding, buzzing or no sound from the door when trying to lock/unlock.
- Door does not latch properly or remains ajar warning light stays on.
Most Common Causes Of Failure
Failures are usually caused by mechanical wear of internal gears, water ingress and corrosion inside the door, broken plastic components, seized actuator motor, or poor electrical connection at the door harness connector. Frequent use, long-term exposure to moisture and blocked door drain channels accelerate deterioration.
Installation Recommendations
- Before starting work, disconnect the negative battery terminal and follow manufacturer procedures to avoid electrical damage or airbag/comfort system faults.
- Remove the door trim carefully to access the lock mechanism. Peel back moisture barrier only as needed and preserve the sealing tape for reinstallation.
- Support the door handle and locking rods when detaching linkages; note the orientation of clips and rods for correct reassembly.
- Unplug the electrical connector and remove the retaining screws/bolts. Replace the lock with the new unit and refit bolts to the correct torque. Reconnect the wiring and test locking/unlocking operation before resealing the moisture barrier and refitting trim.
- Check and clear door drain holes and lubricate moving parts with an appropriate grease to prolong service life.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4, 5-door, First Series (Driver’s Door)
- Product Codes: 9681337180, 9660699880 F03, 9647172780 F03, 9683416080, 9681331680
- Additional Numbers: 9135Z5, 9135FA, 9135R0
Practical Tips For Long-Term Reliability
- Inspect and clean the electrical connector for corrosion; apply dielectric grease to help prevent future corrosion.
- Ensure the moisture barrier is seated correctly to prevent water reaching the lock mechanism.
- If the actuator is noisy but still operating, replacement is recommended before complete failure to avoid being locked out.
This part is suited for technicians and competent DIYers familiar with door trim removal and vehicle electrical systems. Searching by part numbers 9681331680 or 9135Z5 will help find compatible units quickly.
