This lock set is designed specifically for Peugeot 406 models, including driver and passenger door locks, the ignition switch, and comes with 2 keys. It does not include a rear tailgate lock. The ignition switch is in excellent condition, although the alarm wiring previously installed was cut off. This lock set ensures complete locking functionality to enhance your vehicle’s security.

Usage and Replacement

The set is ideal for both professional mechanics and car enthusiasts performing their own repairs. Replacing door and ignition locks is essential when locks fail due to wear, damage, or if keys are lost or compromised. This lock set helps restore secure vehicle access and ignition control.

Technical Information

• Manufacturer: PSA Citroën Peugeot
• Model: Peugeot 406
• Product Codes: 4162Z8, 4162Z6
• Additional Numbers: NFP (Not Further Provided)

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.

Complete lock set suitable for Peugeot 406 vehicles fitted to PSA Citroën Peugeot platforms. The kit includes driver and passenger door locks plus the ignition barrel and two keys; the tailgate lock is not included. Frequently referenced by part numbers 4162Z8 and 4162Z6, this assembly restores mechanical locking and ignition functions for routine repairs or replacements.

Key Features

• Includes driver and passenger door lock mechanisms, ignition barrel and two mechanical keys.
• Direct physical replacement compatible with PSA part codes 4162Z8 and 4162Z6.
• Suitable for professional workshops and competent DIY mechanics looking for a reliable replacement solution.
• If your vehicle uses transponder immobiliser keys, additional key programming or synchronization may be required after fitting.

Technical Information

• Manufacturer: PSA / Citroën Peugeot
• Model: Peugeot 406
• Product Codes: 4162Z8, 4162Z6
• Other Numbers: NFP

Function And Common Faults

Door lock assemblies and ignition barrels provide secure entry and start functions. Common failure modes include worn tumblers or wafers, corrosion, key breakage, or mechanical wear in the lock actuator. Ignition barrels can stiffen or fail over time, preventing smooth key rotation. Replacement is typically required after many years of use, exposure to moisture, or after mechanical damage.

Installation Notes

General fitting guidance: remove the interior door trim and disconnect any electrical connectors to access the lock mechanism, unfasten retaining screws and remove the old lock assembly. For the ignition barrel, remove the steering column covers and follow manufacturer instructions to release the barrel from the switch housing. Always disconnect the vehicle battery before working on the ignition system. If the vehicle uses an immobiliser, plan for key programming or synchronization by a locksmith or dealer.

Compatibility & Fitment

Verify compatibility by matching your existing part numbers to 4162Z8 or 4162Z6. This kit is intended for Peugeot 406 fitment; confirm physical match and connector types before installation.

Why Buy

This lock set provides a practical, time-saving replacement for workshops and DIYers who need to restore locking and ignition functions quickly. Supplied as a complete set with keys, it reduces the need to source separate components and helps get vehicles back on the road faster.