Description
Lock set for Citroën C4 Picasso first series — Driver’s door lock, ignition barrel plus 2 keys.
High-quality replacement lock set designed for mechanics and experienced DIY enthusiasts who maintain Citroën/Peugeot vehicles. This complete kit restores mechanical security and door/ignition operation on first‑generation Citroën C4 Picasso models, helping to eliminate door sticking, key wobble and ignition problems. Ideal when the driver’s door cylinder is worn, the ignition barrel is stiff or keys are damaged. Key search terms: Citroën C4 Picasso lock set, driver door lock, ignition barrel, 4162KF, 4162KC, 4162XT.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso (First Generation; approx. 2006–2013)
- Product Codes: 4162KF, 4162KC, 4162XT
- Other Numbers: Common Stellantis Group Reference Numbers Related To Door And Ignition Locking Systems
Function And Application
The kit contains a driver’s door lock cylinder, an ignition barrel and two matching keys. The door cylinder operates the mechanical latch and central locking linkage, while the ignition barrel provides mechanical start-switch actuation and interfaces with the vehicle’s key. Together they ensure secure locking/unlocking of the driver’s door and reliable engine start operation.
Compatibility
Primarily intended for Citroën C4 Picasso first‑generation models. Part numbers 4162KF / 4162KC / 4162XT are used to identify the matching assemblies within the Stellantis parts catalogue. Always verify part numbers listed on the old components before installation to confirm fitment.
Replacement Procedure
Designed for professional workshops and experienced DIYers. Typical replacement steps:
- Remove inner door trim to access lock assembly and linkages.
- Disconnect electrical connectors for central locking and any microswitches on the door (if present).
- Unclip and disconnect rods and linkages from the lock cylinder and handle mechanism.
- Unscrew the lock retaining fasteners and withdraw the old cylinder.
- Replace the ignition barrel by removing the steering column covers and following manufacturer procedure for barrel removal.
- Install new components in reverse order, reconnect linkages and electrical connectors, then test mechanical operation of door lock and ignition switch before reassembling trim.
Installation Recommendations
- Use appropriate trim tools to avoid damaging panels. Keep fasteners and clips organized.
- Disconnect the negative battery terminal when working near ignition components or electrical connectors to prevent short circuits and unintended airbag deployment.
- Lubricate new lock cylinders with a graphite or PTFE dry lock lubricant to ensure smooth operation—avoid heavy oils that attract dirt.
- Check and, if necessary, adjust the door latch striker alignment to prevent premature wear on the new cylinder.
- If keys include a transponder chip, programming may be required for immobilizer recognition—arrange with qualified diagnostic equipment if needed.
- After installation, verify that central locking, manual lock/unlock and ignition switch positions function correctly across all doors and with the engine start sequence.
Why This Part Fails Most Often
- Mechanical Wear: Repeated use causes tumblers and wafers inside the cylinder to wear, leading to key play or inability to turn.
- Corrosion and Dirt: Moisture ingress or contaminated lubricant can seize components or make operation stiff.
- Physical Damage: Forced entry attempts, bent or broken keys and impact damage to door hardware accelerate failure.
- Misalignment: Door striker or latch misalignment places extra stress on the cylinder and linkage, shortening component life.
- Electrical Faults (Associated Systems): Problems in central locking actuators or wiring can be mistaken for a lock cylinder failure—verify mechanical operation separately.
Practical Tips
Always test the new keys and lock operation before finishing reassembly. Remove heavy keyrings to reduce stress on the ignition barrel and prolong life. When in doubt about immobilizer or key programming, consult a specialist with PSA diagnostic tools.
