This Electric Central Lock Actuator Is A Direct Replacement For The Right Front (Passenger Side) Door On Citroën C4 II And DS4 Models. Designed To Restore Reliable Central Locking Operation, It Is Frequently Searched By Product Codes 9685351480 And 9136GR, Which Makes Identification Simple For Workshops And Do-It-Yourself Mechanics. The Unit Controls Door Locking And Unlocking Via The Vehicle’S Central Locking System And Interfaces With The Door Latch Mechanism To Provide Secure Closure And Remote Locking Functionality.

Key Benefits

Restores Smooth And Quiet Locking Action, Eliminates Intermittent Central Locking Faults, And Prevents Manual Forcing Of The Door Lock. Ideal For Mechanics And Enthusiasts Who Need A Direct-Fit Replacement That Matches Original Equipment Functionality. Including The Correct Part Number In Your Search (9685351480, 9136GR) Improves Findability And Ensures Fast Installation.

Compatibility

• Citroën C4 II (C4 Mk2)
• DS4

Technical Information

• Manufacturer: Citroën (Stellantis)
• Model: Citroën C4 II; DS4
• Product Codes: 9685351480, 9136GR
• Other Numbers: OEM 9685351480; Internal Code 9136GR

Installation Recommendations

Disconnect The Negative Battery Terminal Before Starting Work To Prevent Short Circuits And Unintended Actuator Movement. Remove The Door Trim Carefully Using A Trim Removal Tool To Avoid Breaking Clips. Peel Back The Moisture Barrier, Disconnect The Electrical Connector And Lock Rods, And Unfasten The Actuator From The Door Latch Assembly. Fit The New Actuator In The Reverse Order, Reconnect The Electrical Connector And Linkage, Reinstall The Moisture Barrier And Door Trim, Then Test Locking And Unlocking Functions Several Times With The Engine Off And With The Ignition On. If Electrical Faults Persist, Inspect Connectors And Wiring For Corrosion Or Broken Wires; A Multimeter Can Help Verify Power And Ground At The Connector.

Most Common Failure Causes

• Wear Of Internal Motor Or Gears: Plastic Internal Gears Can Degrade Over Time, Producing Grinding Or Failure To Move The Latch.
• Moisture Ingress And Corrosion: Water Penetration Or Condensation Can Cause Corrosion Of Electrical Contacts Or Mechanical Seizure.
• Electrical Issues: Intermittent Wiring, Damaged Connector Pins Or A Faulty Ground Can Prevent The Actuator From Receiving Power.
• Mechanical Damage: Impact Or Forced Operation Can Bend Linkages Or Break Mounting Tabs.

Typical Symptoms Include Intermittent Locking/Unlocking, No Response From The Door When Using Remote Or Central Locking, Excessive Noise From The Door, Or The Door Not Securing Properly. Replacing The Actuator With The Correct Product Code (9685351480 / 9136GR) Restores Factory Functionality And Ensures Compatibility With The Door Latch And Central Locking System.

This replacement electric lock (central locking actuator) is designed for the right rear (passenger-side) door of the Citroën C4 II. It operates the door latch and integrates with the vehicle’s central locking system to lock and unlock the door electrically. Commonly searched by OEM and aftermarket codes, this unit is suitable for technicians and experienced DIYers who need a direct-fit solution for faulty rear door locking on Citroën C4 II models.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 II — Right Rear Door (Passenger-Side)
• Product Codes: 9685352080, 9138AH, 9685351480, 9136GR
• Other Numbers: 9685351480, 9685352080, 9136GR, 9138AH

Function and Application

The actuator is an electrically driven lock mechanism that moves the door latch between locked and unlocked positions when the central locking system is activated. It connects to the vehicle wiring harness and receives a 12 V signal from the vehicle’s central locking control. Proper operation ensures secure door closure and reliable remote locking/unlocking from the vehicle key fob or interior switches.

Installation Recommendations

• Disconnect the negative battery terminal before starting work to avoid short circuits.
• Remove the inner door panel and protective moisture barrier to access the lock assembly.
• Unplug the electrical connector and detach any rods or clips linking the actuator to the latch.
• Remove mounting screws/bolts securing the actuator, replace the unit, and reassemble in reverse order.
• Apply a small amount of dielectric grease to the connector contacts to reduce corrosion risk.
• After installation, check door locking/unlocking with the key fob and interior switches and ensure the latch engages smoothly before refitting the door card.

Most Common Failure Reasons

• Water ingress and corrosion of electrical contacts caused by damaged door seals or moisture penetration.
• Mechanical wear or broken plastic gears inside the actuator after years of use.
• Connector or wiring harness damage from door movement, pinch points, or rodent activity.
• Foreign objects or misaligned latch mechanisms increasing load on the actuator motor.

There is no fixed replacement interval; actuators typically fail after prolonged use, high mileage or long-term exposure to moisture and road salt. Replacing a faulty actuator restores reliable central locking and prevents issues such as a door that will not lock, unlock, or that intermittently operates.

This part is intended for professionals and skilled DIYers. If you value a direct-fit replacement that matches common OEM numbers for the Citroën C4 II right rear door, this actuator is a practical solution to restore proper locking function.