Description
Ignition barrel, driver door lock and one key for PEUGEOT 407 vehicles.
This complete lock set (ignition barrel, driver door lock and one key) is designed for Peugeot 407 owners and professional mechanics seeking a reliable direct-replacement mechanical solution. Supplied under Stellantis / Citroën Peugeot references, the kit is suitable for restoration of mechanical locking function and for vehicles where the original ignition barrel or door lock is worn, damaged or missing. The part numbers commonly used to identify this assembly are 4162EQ and 4162EA — many customers search by these codes to find the correct replacement.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Peugeot 407
- Product Codes: 4162EQ, 4162EA
- Other Numbers: No additional numbers provided
Function And Features
The set restores the mechanical locking functions: the ignition barrel provides the physical interface for starting the engine and securing the steering column, while the driver door lock restores secure entry to the vehicle. One key is supplied with the kit for mechanical operation. The components are intended to match the OEM mounting points and mechanical profiles used on Peugeot 407 vehicles.
Compatibility And Fitment
- Designed for Peugeot 407 models — verify that the part numbers (4162EQ / 4162EA) match the vehicle’s original references.
- Fitment depends on body and trim variants; intended as a mechanical replacement for the driver door lock and ignition barrel assembly used on 407 series cars.
Replacement Procedure
Basic replacement steps for experienced technicians or competent DIYers:
- Before starting, secure the vehicle and, as a safety precaution, disconnect the negative battery terminal to avoid electrical issues.
- Remove the door trim panel to access the driver door lock mechanism (retain fasteners and clips). Disconnect any wiring connected to the central locking actuator if present.
- Unbolt and remove the old door lock and linkage. Fit the new lock, verify mechanical operation of the latch and linkage, then reassemble the door panel.
- For the ignition barrel, remove steering column covers to access the barrel retention screws. Extract the old barrel (note any retaining pins or clips) and fit the replacement unit. Confirm that the steering column locks/unlocks correctly and that the ignition positions operate as expected.
- Have the key cut to match the new barrel if necessary. If the vehicle uses an immobiliser/transponder system, key programming may be required (see below).
Installation Recommendations
- Use appropriate trim tools to avoid damaging panels. Keep all screws, clips and fasteners organized for reassembly.
- If the key must be cut, use a professional key-cutting service for an accurate result.
- If the vehicle is equipped with an immobiliser transponder, programming of the key may be required by a locksmith or dealership with the correct diagnostic equipment.
- Test all mechanical and electrical functions (central locking, door latch operation, ignition positions) before finishing reassembly.
Why This Part Fails
Common causes of failure include mechanical wear of tumblers and internal components, corrosion from moisture ingress, broken or bent key profiles, and damage from forced entry or vandalism. Frequent usage, exposure to dirt and lack of lubrication accelerate wear. Failures typically develop over many years and are often noticed when keys begin to stick, turn roughly, or when the lock fails to operate consistently.
Notes For Professionals And DIYers
This item is aimed at automechanics and experienced DIYers who are familiar with lock replacement procedures. Always verify that the supplied product codes match the vehicle’s original part references. When in doubt about immobiliser requirements or key programming, consult a qualified locksmith or a service with PSA diagnostic capability.
