This replacement electric door lock is designed for the right front (passenger) door of the Citroën C4 Coupé (first series). It restores reliable central locking operation, mechanical latch engagement and remote locking/unlocking when the original actuator or latch assembly has worn out or become damaged. Ideal for professional workshops and competent DIY mechanics who search by part number (9660700680, 9136EV).

Key Features

High-compatibility replacement for the original right front door central locking unit. Compatible with central locking system, including mechanical latch, actuator motor and electrical connector matching original PSA wiring. Commonly referenced by OE codes 9660700680 and 9136EV.

Benefits

• Direct fit for Citroën C4 Coupé first generation—plug-and-play electrical connector and mounting points.
• Restores secure door latching and reliable central locking function.
• Part-number searchable: improves findability for garages and independent mechanics (9660700680, 9136EV, 9681332080).

Installation Procedure

Recommended for experienced technicians or competent DIY mechanics. Typical replacement steps:

• Disconnect the vehicle battery before starting work to avoid short circuits and accidental airbag deployment.
• Remove the interior door trim panel and water shield carefully to access the lock assembly and linkages.
• Disconnect the electrical connector and unclip/unscrew the latch unit from the door shell.
• Release and mark mechanical linkages (rods/cables) to ensure correct reassembly, then transfer them to the new lock if required.
• Fit the replacement lock, reconnect electrical connector and linkages, then test locking/unlocking operation before reassembling the trim.
• Reinstall the trim and reconnect the battery. Verify central locking, remote operation and mechanical latch engagement.

Most Common Failure Reasons

• Wear Of Internal Plastic Gears Or Actuator Motor: Repeated use and age lead to stripped gears or motor failure.
• Water Ingress And Corrosion: Moisture entering the mechanism causes corrosion and electrical faults.
• Mechanical Damage: Impact or door misalignment can damage the latch or linkage.
• Electrical Connector Or Wiring Faults: Oxidation or fatigue in the connector or wiring can prevent reliable operation.
• Sticking Due To Dirt And Lack Of Lubrication: Debris and dried grease impede smooth movement of the latch.

Service Life And Maintenance

Service life depends on use, environment and maintenance. Locks in high-use doors or in vehicles exposed to moisture and salt can fail earlier. Regular lubrication of moving parts and keeping the door seals intact helps prolong service life. If symptoms such as intermittent locking, noise from the door when locking, or inability to latch occur, inspect the lock assembly early to avoid being unable to secure the door.

Technical Information

• Manufacturer: Stellantis (Citroën)
• Model: Citroën C4 Coupé I (First Generation, 2004–2010) — Right Front (Passenger) Door
• Product Codes: 9660700680, 9136EV
• Other Numbers: 9681332080

Installation Recommendations

• Always disconnect the battery before removing or installing the door lock.
• Keep fasteners and clips organized and replace any damaged trim clips to avoid rattles after reassembly.
• Transfer or correctly position all rods and linkages; incorrect routing causes malfunction.
• After installation, test the mechanism in all modes (remote, central locking, manual lock, and door open/closed) before completing reassembly.
• Use dielectric grease on electrical connectors to protect against moisture and corrosion.

Product Overview

This is a used central locking door lock/actuator intended for the right front (passenger) door of the Citroën C4 Coupé (first series). The unit is compatible with vehicles using the listed part numbers and is a direct replacement for failed or worn door locks. Ideal for professional mechanics and experienced DIY technicians seeking an OEM-fit solution to restore reliable central locking operation.

Key Features and Function

• Restores Central Locking: Controls the mechanical latch and electric locking/unlocking of the right front door via the vehicle’s central locking system.
• OEM Fitment: Matches original mounting points and linkage for straightforward replacement on compatible Citroën C4 Coupé models.
• Common Symptoms Indicating Failure: Door that will not lock/unlock with remote or central locking, intermittent operation, audible motor noise without movement, or door not latching securely.

Typical Causes Of Failure

Door locks commonly fail due to mechanical wear of internal gears and levers, corrosion from moisture ingress, broken or fatigued plastic components, seized linkages, or wear in the electric actuator motor. Water ingress and accumulation of dirt inside the door cavity accelerate wear and corrosion, especially in older vehicles or cars exposed to harsh climates.

Replacement And Installation

Replacement requires removal of the inner door trim panel to access the lock assembly. Typical steps:

• Disconnect Battery Before Work: Always isolate the vehicle battery before starting to avoid short circuits and potential module damage.
• Remove Door Trim And Moisture Barrier: Carefully detach trim clips and the water shield to access the lock and linkage.
• Disconnect Electrical Connector And Linkages: Label or note the positions of rods and cables before detaching to ensure correct reassembly.
• Unbolt And Replace Lock Assembly: Remove retaining bolts, fit the replacement lock, reconnect linkages and connector, then test operation before reassembling the door card.
• Functional Check: Verify locking/unlocking by remote and interior switch, and confirm the door latches and opens smoothly.

Installation Recommendations

• Use Appropriate Tools: Use trim tools to avoid damaging the door card and correct-size sockets for bolts.
• Inspect Linkages And Clips: Replace brittle or corroded rods, clips, and grommets to prevent premature failure after installation.
• Protect Against Moisture: Ensure the moisture barrier is reinstalled correctly; apply dielectric grease to electrical connectors to reduce corrosion risk.
• Test Before Final Assembly: Operate the lock multiple times and confirm mechanical engagement before refitting the door trim.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C4 Coupé (First Series) — Right Front Passenger Door
• Product Codes: 9681332080, 9136EV
• Additional Numbers: 9660700680

Why This Part Is Useful

Replacing a faulty door lock with a compatible unit restores vehicle security and convenience functions. For workshops, keeping stock of common codes like 9681332080 and 9136EV reduces repair turnaround. For DIY enthusiasts, a correct-fit replacement avoids costly late-stage adjustments and retains factory operation.