Reliable replacement Electric Central Locking Latch designed for the left rear door of Citroën C4 5‑door models. Ideal for professional garages and DIY enthusiasts who perform on‑car repairs. This unit restores secure locking and ensures correct interaction with the vehicle’s central locking system. Frequently searched by product codes (9647175180 / 9137E0 / 9137K5 / 9137Q2), the latch is a direct‑fit part intended to replace a worn or damaged original lock mechanism.

Technical Description

The latch assembly provides mechanical locking and release of the left rear door and contains the internal levers and connections that link the door handle, central locking actuator and internal locking rods. It transfers actuation from the central locking motor to the door striker, secures the door in the closed position, and prevents unwanted opening. The unit is compatible with power locking systems and works together with interior lock/unlock rods and the exterior/interior handles.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C4 5‑Door (Left Rear Door / Driver’s Side Rear)
• Product Codes: 9647175180, 9137E0, 9137K5, 9137Q2
• Other Numbers: 6460SL, 9137

Installation Recommendations

• Disconnect The Battery Before Starting Work To Avoid Short Circuits And Electrical Damage.
• Remove The Inner Door Trim Panel Carefully, Preserving Clips And Fasteners; Peel Back The Moisture Barrier Without Tearing It.
• Disconnect The Electrical Connector And Any Linkage Rods; Note Their Routing Or Take Photos For Reassembly.
• Remove Mounting Bolts/Screws Securing The Old Latch, Transfer Any Required Linkage Clips Or Gaskets To The New Unit.
• Fit The New Latch, Reconnect Rods And Electrical Connector, Reinstall The Moisture Barrier And Door Trim.
• Check Function By Operating Central Locking, Remote Key, Interior And Exterior Handles; Ensure Smooth Locking/Unlocking And Correct Latch Engagement With The Striker.
• If Any Adjustment Is Required, Loosen Mounting Points Slightly To Align The Latch With The Striker For Positive Engagement.

Most Common Causes Of Failure

• Water Ingress And Corrosion Leading To Seized Levers Or Rusted Fasteners.
• Wear Or Breakage Of Internal Plastic Gears/Levers After Prolonged Use.
• Damaged Or Detached Linkage Rods And Clips Causing Incomplete Actuation.
• Electrical Connector Corrosion Or Poor Contact Affecting Central Lock Signals.
• Mechanical Jamming Due To Dirt, Debris Or Impact Damage From Door Misalignment.

Replacing A Faulty Latch Restores Door Security And Central Lock Reliability. Suitable For Workshops And Experienced DIY Mechanics Looking For A Direct Replacement Part Identified By The Listed Product Codes.

Reliable replacement electric door lock (central locking actuator) designed to restore secure locking and unlocking on the left rear (driver’s side rear) door of Citroën C4 five‑door models. Ideal for professional workshops and competent DIY mechanics, this unit is often searched by part numbers 9660700380, 9137E0, 9137K5 or 9137Q2 — include these codes when locating compatibility. The assembly supplies electric actuation of the latch and lock position feedback to the vehicle’s central locking system, ensuring smooth operation with remote key or door switch.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C4 5‑door (Left Rear Door)
• Product Codes: 9660700380, 9137E0, 9137K5, 9137Q2
• Additional Numbers: 6460SL, 9137

Function and Features

This electric lock/actuator operates the door latch and the central locking mechanism. It converts electrical signals from the car’s locking system into mechanical movement to lock or unlock the door and typically provides a position/status signal back to the vehicle electronics. The unit is a direct replacement part for the left rear door and is built to integrate with the existing door latch and wiring harness.

Common Failure Modes

Door locks usually fail due to mechanical wear, seized internal gears, water ingress or corrosion inside the mechanism, damaged linkages, or a failed electric motor. Intermittent operation can also be caused by a worn microswitch or poor connector contacts. Failures often occur after many cycles and exposure to moisture or road salt.

Replacement Procedure (Overview)

• Remove interior door trim carefully to access the lock assembly — keep clips and screws organized.
• Disconnect the door wiring harness and any connector for the lock motor/sensor.
• Detach linkage rods/cables from the latch mechanism (note their positions for reassembly).
• Unbolt and remove the old lock module from the door shell.
• Fit the new lock assembly, secure mounting bolts and reconnect linkages and electrical connector.
• Before refitting the trim, test lock/unlock operation with the key fob and interior switch and verify latch engagement.
• Reinstall door trim and check all functions (child lock, manual lock, central locking cycles).

Installation Recommendations

• Always disconnect the negative battery terminal before working on door electrics to avoid short circuits and unintended actuation.
• Work on a warm, dry day if possible — moisture increases the risk of corrosion and makes seals harder to re-seat.
• Use appropriate trim tools to avoid damaging interior panels and clips.
• Lubricate mechanical latch points with recommended grease and ensure linkages move freely without binding.
• After installation, perform multiple lock/unlock cycles and check remote operation, manual lock, and door open/close to confirm correct function.

Why This Part Is Often Replaced

The left rear door lock is a wear item subject to frequent use and environmental exposure. Water ingress, rust, and mechanical fatigue of gears or linkages are the most common reasons for replacement. Electrical faults such as a failed motor or worn position switch can also prevent proper locking or reporting of door status to the vehicle.

Notes

When searching for this item, use the part numbers listed above (9660700380, 9137E0, 9137K5, 9137Q2) to ensure correct match. This unit is intended as a direct replacement for the left rear (driver’s side) door on Citroën C4 five‑door models.

This electric central locking unit is a direct-fit replacement for the left rear (driver’s side) door of the Citroën C4 5‑door. Designed for workshop technicians and experienced DIYers, the lock restores reliable locking, unlocking and latch engagement for vehicles showing symptoms such as intermittent locking, door not latching, or refusal to unlock with the remote. Ideal for searches by part number (9681336980, 9137Q2, 9137K5) — include these references when ordering to speed up matching.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 (5‑door) — Left Rear Door (Driver’s Side)
• Product Codes: 9681336980, 9137E0, 9137K5, 9137Q2
• Additional Numbers: 6460SL

Function And Benefits

The unit is the electromechanical lock/actuator that controls central locking operations for the left rear door. It integrates the latch mechanism, electrical actuator and linkage points for the interior and exterior handles. Replacing a worn or defective lock restores correct door latching, improves security and prevents water ingress into the cabin caused by improperly closed doors. The part is suitable for technicians who need a reliable OE‑style replacement and for DIY owners familiar with door trim removal.

Installation Recommendations

Before starting work, always disconnect the vehicle battery to prevent short circuits and unintended airbag or electrical system activation. Typical replacement procedure:

• Remove inner door trim and moisture barrier carefully using suitable trim tools to avoid damage.
• Disconnect the electrical connector from the lock actuator and detach the locking rods/clips from the mechanism, noting rod positions for reassembly.
• Remove the mounting bolts securing the lock, remove the old unit and fit the replacement in the correct orientation.
• Reconnect rods and electrical connector, test locking/unlocking (both remote and manual) before reinstalling the door trim.
• Lubricate latch moving parts with appropriate grease and ensure clips/fasteners are secure.

After installation, verify central locking operation on all doors, confirm the door closes and latches properly, and check that child locks and interior handles operate as expected.

Most Common Failure Causes

Door locks and actuators most often fail due to a combination of mechanical wear and environmental factors: degraded internal plastic gears or motor wear from repeated cycles, corrosion from water ingress, seized or bent linkage rods, broken clips, or damage from door impacts. Symptoms include intermittent operation, loud or slow actuator noise, door that will not latch or unlock, or the lock sticking in one position. Failures commonly appear after several years and many thousands of open/close cycles, especially on vehicles exposed to moisture, road salt or lack of periodic lubrication.

Notes For Professionals

When ordering, reference the part numbers listed above to ensure correct matching. This unit is a direct replacement for the left rear door on Citroën C4 5‑door models; installation is straightforward for any technician with basic door trim removal experience. If rust or body damage is present, inspect surrounding sheet metal and drain paths to prevent premature failure of the new lock.