Description
Lock Set – Ignition Barrel, Driver’s Door And Fuel Filler Cap – 2x Keys
Complete lock set for Citroën C4 vehicles, including ignition barrel, driver’s door lock cylinder and fuel filler cap lock, supplied with two keys. This ready-to-fit kit is ideal for professional workshops and DIY mechanics who need a direct replacement part frequently searched by part numbers 4162EP and 4162EA. Manufactured under the Stellantis group (Citroën/Peugeot) specification, the set restores secure locking and reliable ignition operation, helping to eliminate common faults such as key jamming, worn tumblers or fuel cap locking issues.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4
- Product Codes: 4162EP, 4162EA
- Other Numbers: No additional reference numbers available
Function And Benefits
The set includes the ignition barrel (steering column lock interface), the driver’s door lock cylinder and the fuel filler cap lock. Together these components provide mechanical security for vehicle access and engine start. Replacing worn or damaged locks restores smooth key operation, prevents accidental locking or key breakage, and secures the fuel filler against unauthorized opening.
Mounting Recommendations
- Always work in a safe, static-free environment and follow standard workshop procedures.
- Disconnect the battery before starting work to avoid short circuits and accidental airbag/locking system actions.
- Ignition Barrel: Remove steering column trim to access the barrel retaining screws or clips, withdraw the old barrel and install the new one ensuring correct alignment with the steering lock. Verify that the key turns smoothly through all positions before reassembling trims.
- Driver’s Door Lock Cylinder: Remove the door card to access the lock mechanism. Release retaining clip or screw, disconnect any linkage, replace the cylinder and test mechanical locking/unlocking and central locking operation if present.
- Fuel Filler Cap Lock: Open the filler flap, remove the fixing screw or clip and replace the lock cylinder. Check that the cap closes and locks reliably.
- If Keys Include A Transponder: Keys supplied may require programming to the vehicle immobilizer. Programming should be performed with appropriate equipment (dealer or qualified locksmith tools) if transponder functionality is present.
- After Installation: Test all functions (door lock, central locking, ignition start and fuel cap locking) with the new keys before finishing reassembly.
Why The Part Fails Most Often
- Wear And Tear: Repeated use causes tumblers and springs to wear, leading to key play, jamming or failure to turn.
- Corrosion And Dirt: Moisture ingress and contamination accelerate wear, particularly in door and fuel cap locks exposed to the elements.
- Forced Entry Or Key Damage: Attempted theft, forced turning or broken key blades can destroy internal components.
- Mechanical Fatigue: Aging plastics and metal fatigue in retaining clips or levers can cause malfunctions in the mechanism.
Practical Tips
- Lubricate new lock barrels with graphite or manufacturer-recommended lubricant; avoid oil-based sprays that attract dirt.
- When replacing multiple locks, consider fitting both the ignition and door cylinders at the same time to ensure consistent operation and keying.
- Keep one spare key in a safe place to avoid lockouts after replacement.
