Description
Complete lock set designed for the Peugeot 406. The kit includes driver and passenger door lock mechanisms, the ignition barrel and two keys. Frequently searched by product codes 4162Z7 and 4162Z6, this assembly is intended as a direct replacement to restore mechanical locking function and vehicle access.
Features
- Driver and passenger door lock mechanisms plus ignition barrel supplied together for a coordinated replacement.
- Two keys included; sets are often supplied keyed to the locks and ignition for immediate fit.
- Direct-fit solution compatible with Peugeot 406 models that use part numbers 4162Z7 / 4162Z6.
- Robust mechanical components designed to resist everyday wear and common failure modes.
Installation & Replacement
- Recommended for professional mechanics and experienced DIY technicians. Before starting, disconnect the vehicle battery where necessary to avoid short circuits.
- Door locks: remove the inner door trim to access the lock unit, detach the door handle and linkage, unbolt the lock mechanism and replace with the new unit. Verify smooth operation of latch and linkages before reassembly.
- Ignition barrel: access through the steering column trim, remove fixing screws or clips, extract the old barrel and fit the new one. Reassemble trim and verify key turns freely to the start position.
- Immobiliser note: on vehicles equipped with immobiliser or body computer systems, key recognition or synchronization may be required after fitting the new ignition barrel or keys. If in doubt, consult vehicle service documentation or diagnostic tools.
Common Faults & Service Life
Lock components typically fail due to mechanical wear, corrosion, broken tumblers, or damaged linkage. Ignition barrels can degrade over time from key wear, dirt ingress or internal spring/tumbler failure. Service life depends on usage and environment; many units remain functional for years but will eventually require replacement when symptoms appear.
- Typical symptoms: difficulty turning the key, door not locking/unlocking smoothly, intermittent central locking operation, or key stuck in lock.
- Preventive action: lubricate lock cylinders with a dry graphite or approved lock lubricant and avoid forcing worn keys.
Technical Information
- Manufacturer: PSA (Citroën/Peugeot)
- Model: Peugeot 406
- Product Codes: 4162Z7, 4162Z6
- Additional Numbers: 4162Z6, 4162Z7
This lock set is ideal when replacing worn or damaged door locks and ignition barrel on Peugeot 406 vehicles. Always verify compatibility with the vehicle identification and, if necessary, consult technical documentation for immobiliser or central locking specifics before installation.
