Description
Electric central locking actuator for the left front door for CITROËN C4 5‑door first series (Driver’s door).
Description
Replacement electric lock/actuator for the left front (driver’s) door designed for Citroën C4 first‑generation 5‑door models. This unit operates the central locking mechanism, receiving commands from the vehicle’s central locking system and moving the lock latch and linkage to lock or unlock the door. It is a common wear item on high‑use vehicles and is often sought by mechanics and DIY enthusiasts under OEM part numbers.
Features And Function
- Direct replacement for the original central door lock actuator on the left front door.
- Electromechanical operation: converts electrical signals into mechanical movement of the lock mechanism.
- Interfaces with the vehicle’s central locking wiring and door latch linkage.
- Designed to restore reliable locking/unlocking and proper door latching.
Compatibility
Intended for Citroën C4 first generation 5‑door models (driver’s door). Commonly referenced by OEM/product numbers listed below — customers and technicians often search using these part numbers when replacing the left front door lock.
How To Replace
Replacement can be performed by experienced DIYers or professional technicians. Typical procedure:
- Prepare tools: Torx and Phillips drivers, trim removal tools, ratchet and sockets, needle‑nose pliers, and a multimeter for quick electrical checks.
- Remove interior door trim: carefully pry off trim clips and remove the door card to access the lock assembly and actuator.
- Disconnect electrical connector to the actuator and release any retaining clips securing the wiring harness.
- Detach the lock rods/linkages from the actuator (note their routing and orientation for reassembly).
- Unbolt the actuator/lock unit from the door shell and remove the old unit.
- Install the replacement unit: position it, bolt it in place, reconnect linkages and electrical connector.
- Test operation: before fully reassembling the door card, verify locking and unlocking with the remote and inside switch; check manual operation of the latch.
- Reinstall door trim and verify all functions (central locking, child locks, door open sensor) work correctly.
Mounting Recommendations
- Disconnect the battery before starting work to avoid short circuits and unintended actuator operation.
- Handle plastic connectors and cable clips with care to avoid breaking brittle parts, especially on older vehicles.
- Compare the replacement unit visually with the original to ensure correct mounting points and connector type.
- Apply a small amount of dielectric grease to electrical connectors to prevent corrosion in humid environments.
- After installation, cycle the lock several times and check door alignment to ensure smooth operation without binding.
Why The Part Commonly Fails
Door lock actuators commonly fail due to a combination of mechanical wear and environmental factors. Typical causes include:
- Wear of internal gears or plastic components from repeated use over many years.
- Ingress of moisture leading to corrosion of electrical contacts or metal parts.
- Broken or bent linkage rods, or seized pivot points that overload the actuator motor.
- Intermittent electrical faults at connectors or wiring caused by chafing or corrosion.
Service life varies with usage and environment; on high‑use or corrosion‑exposed vehicles the actuator may need replacement earlier than on well‑maintained cars.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 First Generation (5‑Door) — Left Front (Driver) Door Lock
- Product Codes: 9660699880; 9135R0
- Additional Numbers: 9681337180; 9660699880 F03; 9647172780 F03; 9683416080; 9135Z5; 9135FA; 9135R0
Notes For Technicians
Inspect surrounding door hardware and linkages when replacing the actuator. A noisy or stiff latch can accelerate actuator wear. Replace or lubricate damaged rods, clips, and pivot points to extend the life of the new unit. After fitting, verify that door switches and central locking signals are operating correctly.
