Description
Electric central locking actuator for the left front door for Citroën C4 5-door first series. Driver’s door.
This electric door lock (central locking actuator) is designed for the left front (driver’s) door of the first‑generation Citroën C4 5‑door. It restores reliable locking and unlocking via remote control or door switch and is suitable for workshops and experienced DIYers who perform body and electrical repairs. The part is commonly searched by OEM numbers such as 9683416080 and 9135FA — include these codes when looking up compatibility or spare parts.
Key Features
- Direct fit replacement for the left front door lock assembly on Citroën C4 (first series, 5‑door).
- Restores central locking function — lock/unlock, mechanical latch actuation and electrical signal for vehicle security systems.
- OE and cross‑reference numbers included to simplify parts lookup.
- Designed for installation by professional technicians or competent DIY mechanics familiar with door trim removal and vehicle electrical connectors.
How It Works
The unit combines a small electric motor and mechanical latch mechanism. When a lock/unlock command is received (remote or switch), the actuator moves the latch or locking rod to secure or release the door. It also transmits the door lock position to the car’s central locking system.
Replacement Procedure (Overview)
- Prepare workspace: Park on level ground, engage parking brake and ensure ignition is off.
- Disconnect battery negative terminal to avoid short circuits during work.
- Remove inner door trim carefully: pry trim clips, remove screws and disconnect any switches or speakers as needed.
- Access lock assembly: peel back moisture barrier and locate the actuator and latch inside the door shell.
- Disconnect electrical connector and any mechanical linkages (rods or cables) from the actuator — note orientation for reassembly.
- Unscrew mounting fasteners and remove the old lock assembly. Install the replacement, reconnect linkages and connector, and secure mounting bolts to the correct torque.
- Test function before reassembling the door trim: operate remote and door switch to confirm locking/unlocking and proper latch operation.
- Reinstall moisture barrier and door trim, reconnect battery and perform final functional check.
Technical Information
- Manufacturer: Citroën (Stellantis)
- Model: Citroën C4 First Series (5‑door) — Left Front Door / Driver’s Door
- Product Codes: 9683416080, 9135FA
- Additional Numbers: 9681337180, 9660699880 F03, 9647172780 F03, 9135Z5, 9135R0
Installation Recommendations
Always disconnect the battery before starting work to prevent short circuits. Follow the vehicle manufacturer’s procedure for door trim removal and reinstallation to avoid damaging clips and the moisture barrier. Use correct tools for removing clips and retaining screws, and check the condition of door linkages and seals while the door is open. After installation, verify the lock cycles smoothly and that the door fully latches and opens from both the inside handle and remote commands.
Most Common Failure Causes
- Wear of internal plastic gears and mechanical components due to age and frequent use.
- Water ingress or corrosion inside the door leading to electrical contact failure or motor seizure.
- Broken or bent linkage rods and clips, preventing correct transfer of motion from the actuator to the latch.
- Intermittent electrical faults caused by corroded connectors or damaged wiring harness within the door.
- Impact damage from door collisions or improper handling during previous repairs.
When replacing the actuator, inspect surrounding components (linkages, connectors, seals) and repair as necessary to prevent repeat failure. Use the OEM numbers listed above when searching for the correct part to ensure fitment and function.
