Product Description

This electric central locking lock is designed for the left front (driver’s) door of the Citroën C4 Coupé. Ideal for professional garages and competent DIY enthusiasts, the unit provides a direct-fit replacement for worn or faulty door locking mechanisms and is commonly searched under OEM numbers 9660700780, 9683418180 and internal code 9135FE. The part restores reliable central locking operation, improves door latching security and eliminates intermittent locking faults that can leave a door unsecured or prevent the lock from operating via key fob or interior switches.

Technical Information

• Manufacturer: Stellantis (Citroën)
• Model: Citroën C4 Coupé (Left Front / Driver Side)
• Product Codes: 9660700780, 9683418180
• Other Numbers: 9135FE

Installation Recommendations

• Always disconnect the vehicle battery before beginning work to avoid short circuits and to protect electronic modules.
• Remove the interior door trim panel carefully to access the lock mechanism; keep clips and screws organized for reassembly.
• Disconnect the electrical connector and any linkage rods before removing the lock unit from the door shell.
• Check door locking rods, clips and the wiring harness for wear or damage while the door is open — replace any brittle clips or corroded connectors.
• After fitting the new lock, test mechanical operation and central locking cycles before reattaching the door trim.
• Use appropriate torque for fasteners and avoid over-bending linkage rods to maintain smooth operation.

How To Replace

1. Disconnect negative terminal of the battery and wait a few minutes.
2. Remove the door card: unscrew visible fasteners and release retaining clips around the panel edge.
3. Peel back the vapor barrier carefully to access the inside of the door shell.
4. Locate the lock assembly and disconnect the electrical connector and linkage rods (note their positions for reassembly).
5. Unscrew the lock unit mounting bolts and remove the actuator/latch from the door.
6. Install the replacement lock, reconnect linkages and electrical connector, then operate the lock manually to confirm correct movement.
7. Reconnect the battery and test central locking via key fob, door switch and manual operation; reassemble the door trim after successful tests.

Why This Part Most Commonly Fails

• Water ingress and corrosion inside the door, leading to seized mechanical parts or electrical connector faults.
• Wear of internal gears and plastic components in the actuator, causing loss of drive or intermittent operation.
• Mechanical damage from forced door closing or impact which can bend linkages or break mounting points.
• Electrical faults such as corroded connectors or damaged wiring looms preventing power reaching the actuator.

Notes For Buyers

Searchable by OEM numbers 9660700780, 9683418180 and code 9135FE. Suitable for Citroën C4 Coupé left front (driver) door applications. Recommended for repair shops and experienced DIYers who have basic tools for door trim removal and electrical disconnection.