Description
Complete Lock Set for Citroën Xsara and Xsara Picasso: this kit includes door lock cylinders for driver and passenger doors, the fuel filler flap lock and the ignition switch, supplied with two keys. Designed for professional workshops and competent DIYers who need a reliable, direct-fit replacement part.
Product Overview
This lock set restores secure locking functions across the vehicle: door entry, tank flap and ignition. It is compatible with PSA models using the listed part numbers and provides a straightforward way to replace worn or damaged locks and lost keys. Ideal when locks are sticking, tumblers are worn, or when full set replacement is required after key loss.
Key Features
- Complete set: Driver and passenger door locks, fuel filler flap lock and ignition switch.
- Includes Two Keys: Supplied with two matching keys for immediate use.
- Direct fit for Citroën Xsara and Xsara Picasso models carrying part numbers 4162Y9 and 4162Z4.
- Robust mechanical construction suitable for workshop replacement or DIY installation.
Installation Notes
Basic mechanical skills are required. Typical replacement steps:
- Disconnect the vehicle battery before working on the ignition to avoid electrical faults and to minimise risk when removing steering column covers.
- For door locks: remove the interior door trim to access retaining screws and linkage rods, unclip or unscrew the lock cylinder and replace with the new unit, then reconnect linkages and test function.
- For the ignition switch: remove steering column covers to access the switch assembly; some models require removal of the steering wheel or airbag cover — if unsure, consult a service manual or professional.
- After mechanical installation, check that all locks operate smoothly and that keys turn without binding. If the vehicle is equipped with immobiliser transponder keys, key programming may be required for engine start functionality.
Common Causes Of Failure
Locks and ignition switches typically fail due to normal wear of tumblers, corrosion from moisture ingress, broken or bent key blades, contamination, or mechanical impact. Symptoms include sticking keys, difficulty turning the key, inability to lock or unlock doors, or ignition malfunction. Replace the affected unit or the full set if multiple locks show wear.
Technical Information
- Manufacturer: PSA (Citroën/Peugeot)
- Model: Citroën Xsara, Xsara Picasso
- Product Codes: 4162Y9, 4162Z4
- Other Numbers: NFP
If you are unsure about fitment, immobiliser compatibility or the need for key programming, contact a qualified locksmith or a Citroën service centre before installation. This product description is intended to help identify the correct replacement part and to support professional repair decisions.
