Description
Electric lock for the right rear door for Citroën C4 Picasso and Grand C4 Picasso. Rear passenger-side door.
Used electric right rear door lock designed for Citroën/Peugeot group vehicles. This locking unit fits the rear passenger-side door and is a direct replacement for worn or damaged original parts. Ideal for professional workshops and experienced DIY mechanics who search by part number (e.g. 9138J9) to ensure fast identification and correct fitment.
Application And Function
The unit secures and releases the rear passenger-side door as part of the central locking system. It contains the mechanical latch and the electric actuator that receives lock/unlock signals from the vehicle’s central locking module. Proper operation ensures door retention in closed position and allows remote or manual unlocking.
How It Is Replaced
- Disconnect The Battery Before Starting Work To Avoid Short Circuits And Protect The Vehicle Electronics.
- Remove The Interior Door Trim And Any Water Shields Carefully To Access The Locking Mechanism.
- Disconnect The Electrical Connector And Any Rods/linkages Attached To The Lock.
- Unscrew The Fixing Bolts And Remove The Old Lock From The Door Shell.
- Install The Replacement Lock, Reattach Rods/linkages, Connect The Electrical Plug And Secure Bolts To The Specified Torque.
- Test Locking, Unlocking And Child-Safety Functions Before Reassembling The Door Trim.
Installation Recommendations
- Observe Manufacturer’s Instructions And Torque Specifications When Replacing Fasteners.
- Always Disconnect The Battery Prior To Removing The Lock To Prevent Damage To Door Electronics.
- Check Linkages, Clips And Door Latch Striker For Wear Or Damage And Replace If Necessary.
- Ensure Electrical Connector Pins Are Clean And Free From Corrosion; Apply Dielectric Grease If Appropriate.
- After Installation, Verify Central Locking Operation From All Doors And Test Manual Operation Several Times.
Most Common Failure Causes
- Wear Of Internal Mechanical Components Such As Plastic Gears Or Latch Pawls Due To Age And Frequent Use.
- Water Ingress And Corrosion Leading To Electrical Faults Or Seized Mechanisms—common On Lower Door Areas.
- Actuator Motor Failure Or Intermittent Electrical Contacts Causing Loss Of Remote Locking Function.
- Damaged Linkages Or Broken Clips From Impact Or Forced Operation Preventing Proper Latch Movement.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso, Citroën Grand C4 Picasso
- Product Codes: 9138J9, 24099158, 24098158, 24103158
- Additional Numbers: 9138 J9 (alternative spacing may be used in searches)
This replacement lock is suitable for mechanics and competent DIYers who need a reliable unit identified by OEM codes. When replacing, inspect door sealing and drainage channels to reduce the risk of future failures caused by moisture.
