Description
Lock Set For Citroën C8 – Can Be Used On Peugeot 807
Driver Door, Passenger Door, Fuel Filler Flap And Ignition Switch Housing
Immobilizer Has Been Connected To The Ignition Switch Wiring – Wires Must Be Joined
Includes 2x Key
Overview
This complete lock set is designed for Citroën C8 and is also compatible with Peugeot 807. The kit covers the main access points: driver door lock, passenger door lock, fuel filler flap lock and the ignition switch housing (ignition barrel). Two keys are supplied with the set. The ignition barrel wiring already has the immobilizer wires connected — these wires must be joined correctly during installation to restore immobilizer function.
Why Choose This Lock Set
Ideal for professional workshops and experienced DIY mechanics, this kit allows a full replacement of worn or damaged locks in one service operation. Listing the common parts together reduces diagnostic time and simplifies parts ordering — many customers search directly by codes such as 4162Y4 and 4162Y2. The set is suited for vehicles where individual locks show mechanical wear, corrosion or electrical faults in the central locking/immobilizer wiring.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C8, Peugeot 807
- Product Codes: 4162Y4, 4162Y2
- Additional Numbers: 4162y44
Function And Common Faults
Door and fuel flap locks provide mechanical security and, where fitted, electrical signals to the central locking system. The ignition switch housing contains the barrel where the key turns the ignition and interfaces with the vehicle immobilizer. Typical failure modes include mechanical wear of tumblers and linkages, plastic component fatigue, corrosion from moisture ingress, actuator failure in central locking systems, and wiring faults or poor splices affecting immobilizer communication.
How Replacement Is Performed
Replacement should be performed by an experienced mechanic or a competent DIYer with basic tools. Typical steps include:
- Disconnect the negative battery terminal before starting work to avoid short circuits and electronics damage.
- Remove interior door trim panels and protective covers to access the lock mechanisms and linkages.
- Disconnect electrical connectors and central locking actuator plugs where present; note connector positions for reassembly.
- Unbolt the lock units from the door or fuel flap and carefully free the mechanical linkages and rods.
- Install the new locks in reverse order, ensuring linkages operate freely and electrical connectors are secure.
- For the ignition switch housing, remove steering column covers to access the barrel. Reconnect immobilizer wiring as required (see note below).
- Verify mechanical operation of all locks, central locking function and that keys turn smoothly; test locking and unlocking cycles before refitting trim.
Installation Recommendations
- Always Disconnect The Battery Before Starting Work.
- Use Correct Tools To Avoid Damaging Plastic Clips And Trim.
- Lubricate New Locks With Graphite Or Suitable Lock Lubricant To Extend Service Life.
- Secure All Electrical Connections And Insulate Any Splices Properly To Prevent Corrosion.
- Check Mechanical Linkages For Wear Or Bending — Replace Any Damaged Rods Or Clips.
- After Installation, Perform Several Lock/Unlock Cycles And Start The Engine To Confirm Immobilizer And Ignition Function.
Immobilizer Note
The immobilizer wiring has been connected to the ignition switch housing in this set. During installation the immobilizer wires must be correctly joined and insulated. Depending on the vehicle and key status, key programming or synchronization may be required after mechanical reconnection to restore full immobilizer functionality.
Reason Why The Part Most Frequently Fails
Locks and ignition barrels commonly fail due to long-term wear of internal tumblers and linkages, ingress of moisture leading to corrosion, broken plastic parts from repeated use, or electrical faults in actuator wiring. Repeated forceful operation, exposure to road salts and lack of lubrication accelerate wear. Ignition barrels additionally suffer from key wear and metal fatigue in the tumbler mechanism.
Compatibility And Search Tips
Mechanics and DIY enthusiasts frequently search by product codes — 4162Y4 and 4162Y2 — so using these references in orders will speed identification. Compatible With Citroën C8 And Peugeot 807 Applications As Stated Above.
