Description
Electric central locking latch for the left front door for CITROËN C4 5-door first series. Driver’s door.
This left front door electric central locking latch is a reliable replacement for Citroën C4 5‑door first generation driver’s doors. Designed to restore central locking and mechanical locking function, the unit is suitable for professional workshops and competent DIYers who service body and electrical components. Ideal when the door no longer locks/unlocks reliably with the remote or when the latch mechanism sticks or makes noise. Commonly searched by original part numbers, this lock offers direct-fit installation and restores OEM functionality when fitted correctly.
Function And Benefits
The assembly combines the mechanical latch and the electric actuator for central locking. It secures the door striker, engages/disengages with remote locking or door-mounted switches, and signals the central locking system via a microswitch. Replacing a worn or damaged latch eliminates intermittent locking, prevents door rattles, and restores proper door closure and safety. Suitable for technicians needing a straightforward swap using common hand tools.
How To Replace
- Remove Inner Door Trim: Carefully pry off trim clips and remove the door card to access the lock housing. Keep screws and clips organized.
- Lower Window If Required: Move the glass to a convenient position if it obstructs access to the latch assembly.
- Disconnect Electrical Connector: Unplug the central locking actuator connector and any microswitch plugs.
- Disconnect Linkages: Unhook the door handle/locking rods from the latch (note their routing for reassembly).
- Unbolt Latch Unit: Remove the retaining screws/bolts (typically Torx or hex) and extract the latch from the door shell.
- Install New Unit: Fit the new latch, secure bolts to correct torque, reconnect linkages and electrical connector, then test locking/unlocking before refitting the door trim.
Installation Recommendations
- Disconnect The Battery: To avoid short circuits and unintended actuator operation, disconnect the negative battery terminal before starting work.
- Test Before Final Assembly: After connecting the latch, verify central locking, manual locking, and door-closed signal (if applicable) before reinstalling the door card.
- Inspect Linkages And Striker: Check the striker plate and actuator linkages for wear or misalignment and lubricate moving parts with a suitable long‑lasting lubricant or silicone spray.
- Use Correct Tools: Secure fasteners to manufacturer torque values and avoid overtightening plastic components to prevent cracking.
Why This Part Most Commonly Fails
Failure usually results from mechanical wear and environmental exposure. Common causes include worn plastic gears or pawls inside the actuator, corrosion from moisture ingress, broken or bent linkage rods, and seized microswitches. Water entry through door seals can accelerate corrosion and cause intermittent electrical contact. Impact damage from door slams or minor collisions can also deform the latch or striker, producing poor engagement or audible rattles.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 (5-door, first generation)
- Product Codes: 9647172780, 9135FA, 9135R0
- Additional Numbers: 9681337180, 9660699880, 9683416080, 9135Z5, F03
Notes For Mechanics And DIYers
When replacing the latch, pay attention to connector pin condition and wiring insulation. A poor electrical connection or damaged wire can mimic a failed actuator. If central locking remains unreliable after replacement, check the door microswitch and central locking wiring harness. After installation, cycle the locks several times and verify proper door alignment and seal integrity.
