Description
Electric central locking actuator for the right front door for Citroën C4 5-door first series (Passenger door)
This used Electric Door Lock/Actuator is a direct-fit replacement for the right front (passenger) door of first-generation Citroën C4 5-door models. Ideal for professional workshops and DIY mechanics, the unit restores reliable central locking operation and is commonly searched by its part numbers (9647172680, 9136R8, 9136ES). If your central locking is intermittent, noisy, or the door fails to latch/lock electrically, this replacement lock resolves mechanical wear and electrical actuator faults without the need for body or trim panel repairs.
Key Features And Benefits
- Direct replacement for the right front door lock mechanism on Citroën C4 5-door (first generation).
- Restores central locking function, secure latching and door open/close detection.
- Saves time in workshop diagnosis by matching original OE mounting points and connector layout.
- Frequently searched by OEM part numbers for quick identification: 9647172680, 9136R8, 9136ES.
How The Part Works
The unit combines an electric actuator motor with a mechanical latch assembly and electrical connector. When a lock/unlock command is received from the central locking system, the actuator moves internal gears and linkages to operate the latch and door locking rods. Some versions also provide signals to the vehicle’s comfort module for closed/open status.
Replacement Procedure (Overview)
Suitable for experienced technicians and competent DIY mechanics. Typical replacement steps:
- Disconnect the negative battery terminal before starting work to avoid short circuits and accidental airbag deployment.
- Remove door trim and vapor barrier carefully to gain access to the lock assembly. Keep screws and clips organized.
- Disconnect the electrical connector and unclip or detach the internal lock rods/linkages. Note the positions of retaining clips for reassembly.
- Unbolt the lock unit from the door and withdraw it through the access opening.
- Install the new unit in reverse order: bolt in place, reconnect rods and connectors, test function before refitting the trim.
- Check locking/unlocking operation with remote and central locking commands, and verify door latch function and alarm/door-switch signals if applicable.
Installation Recommendations
- Always disconnect the battery before removing the door lock.
- Handle the electrical connector and plastic clips with care; replace broken clips to ensure correct rod geometry and operation.
- Lubricate latch points with suitable non-conductive lubricant to reduce wear and noise.
- After installation, cycle the lock several times and check for smooth engagement and proper door alignment.
Why This Part Typically Fails
- Mechanical Wear: Internal gears and plastic components wear over time, causing sticking or loss of movement.
- Water Ingress: Moisture entering the door through seals can corrode electrical contacts or damage the actuator motor.
- Rod/Clip Failure: Broken or misrouted linkage rods and clips prevent correct mechanical transfer from actuator to latch.
- Electrical Issues: Connector corrosion or wiring faults can stop the actuator receiving lock/unlock signals.
Technical Information
- Manufacturer: Stellantis (Citroën)
- Model: Citroën C4 (First Generation) 5-Door — Right Front (Passenger) Door
- Product Codes: 9647172680, 9136R8, 9136ES
- Additional Numbers: 9136AG, 9660699780, 9683415980
Notes For Mechanics And DIYers
This part is commonly referenced by the listed part numbers when searching catalogs or dismantlers. Ensure correct orientation (right/front passenger) when ordering. If the vehicle exhibits electrical faults beyond the door actuator (for example, no central locking operation at all), diagnose fuses, wiring and central locking module before replacing the lock unit to avoid unnecessary parts replacement.
Recommended Tools
- Torx and Phillips screwdrivers, trim removal tools, pliers for clips.
- Multimeter for basic electrical verification.
- Suitable lubricant for latch mechanism.
