High-quality lock set tailored for the Citroën C4 Picasso (first series). This complete kit includes the driver’s door lock mechanism, ignition barrel and three keys — ideal for mechanics and experienced DIYers who need a reliable replacement during bodywork, accident repairs or routine maintenance. The set is commonly searched by product codes 4162KF / 4162KC (and related reference 4162XT), so it is perfect for customers who look up parts by reference number.

The locks restore mechanical security and steering ignition function; replacing the worn or damaged lock assembly eliminates door jamming, key rotation problems and improves vehicle security. Supplied components are ready for mechanical installation, but keys may require cutting and, depending on vehicle immobilizer configuration, further programming to enable engine start.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 Picasso (First Generation)
• Product Codes: 4162KF, 4162KC
• Additional Numbers: 4162XT

Installation Recommendations

• Before starting work, disconnect the vehicle battery to prevent short circuits and to protect any immobilizer or electronic modules.
• Remove the interior door card and any trim to access the door lock mechanism. Support the door glass if required.
• Unscrew the lock assembly mounting bolts, detach mechanical linkages and any electrical connectors for central locking (if present).
• Replace the ignition barrel by removing the retaining clip or screws; ensure the new barrel engages correctly with the steering column lock when installing.
• Install the new door lock, reconnect linkages and connectors, then test mechanical operation of the latch and locking function before refitting the door card.
• Have the keys cut to match the supplied blanks. If the vehicle uses transponder immobilizer keys, programming or synchronization may be required for the engine to start — this is done with appropriate diagnostic equipment or by a qualified locksmith.
• Lubricate the lock cylinder with a dry graphite or specialist lock lubricant; avoid wet oils that attract dirt.

Why This Part Most Commonly Fails

• Mechanical Wear: Years of use cause tumblers and wafers inside the cylinder to wear, leading to difficult or incomplete key rotation.
• Corrosion and Contamination: Water ingress, dirt and salt accelerate corrosion of lock internals and linkages, causing sticking or seizure.
• Key Damage: Worn or bent keys damage the cylinder profile and increase wear on tumblers.
• Forced Entry or Impact: Attempts to force the lock or accident damage to the door can deform components and impair operation.
• Actuator Failure: In locks with integrated central locking actuators, the small electric motor or gears can fail and prevent locking/unlocking even if the mechanical cylinder works.

Notes for Mechanics and DIYers

This set is aimed at professionals and experienced DIY enthusiasts who are comfortable with door disassembly and key handling. Use common workshop tools and follow manufacturer torque and reassembly guidelines. Searching by the listed product codes (4162KF / 4162KC / 4162XT) will help you quickly match the correct part for the Citroën C4 Picasso first generation.

Product Overview

This complete lock set is designed for Citroën C4 Picasso first‑generation vehicles and includes the driver’s door lock, ignition switch/ignition barrel and two keys. Supplied as a ready‑to‑install replacement for worn or damaged locking components, the kit restores mechanical security and basic ignition functionality. The part codes 4162KF, 4162KC and 4162XT are commonly used when searching for the correct replacement on parts databases and online catalogs.

Who Is This For

Ideal for professional auto technicians and experienced DIY enthusiasts repairing Citroën C4 Picasso vehicles. The kit is suitable when the door lock is sticking, the ignition barrel is worn or keys are damaged or broken. Because many customers search by product code, listing these codes increases findability during parts lookup.

Features And Benefits

• Complete set: Driver door lock, ignition switch/ignition barrel and two matching keys.
• Direct replacement for original style locks used on Citroën C4 Picasso first series.
• Restores reliable locking and ignition operation—reduces risk of key breakage and ignition failure.
• Supplies two keys for immediate use and spare key retention.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C4 Picasso (First Series)
• Product Codes: 4162KF, 4162KC, 4162XT
• Additional Numbers: Common aftermarket reference codes 4162KF / 4162KC / 4162XT

Installation Recommendations

Disconnect the vehicle battery before beginning work to avoid electrical damage and unintended locking. Typical replacement steps include removal of the interior door trim to access the door lock assembly, unfastening mounting screws, disconnecting electrical connectors for central locking (if applicable) and fitting the new lock. For the ignition barrel, remove steering column covers, extract the old barrel and install the new unit with care to align tumblers and keyway. After installation, verify mechanical operation of the door and ignition, ensure smooth key insertion/removal and test central locking functions if present.

Why Locks Fail And How Often

Lock cylinders and door lock mechanisms wear due to repeated use, contamination and corrosion. Common failure causes include worn tumblers in the ignition barrel, broken plastic components inside the door lock actuator, key wear or bending, and water ingress causing corrosion. Lifetime varies with vehicle use and environment; high‑use vehicles or those exposed to moisture and dirt will show symptoms sooner. Regular maintenance and using a spare key can extend service life.

Additional Notes

When replacing locking components, check the condition of the associated linkages, actuator electrical connectors and door latches. If central locking or immobilizer integration is present, ensure that mechanical and electrical connections are correctly reassembled and that keys operate all functions. For complex electronic immobilizer or key‑programming issues, professional diagnostic equipment may be required.

Compatible Searches

Search terms to improve findability: 4162KF, 4162KC, 4162XT, Lock Set Citroën C4 Picasso, Driver Door Lock C4 Picasso, Ignition Barrel C4 Picasso, Keys C4 Picasso.

This complete lock set is designed for Citroën/Peugeot C4 Picasso vehicles and includes the driver’s door lock, ignition barrel and one matching key. Ideal for mechanics and DIY enthusiasts who search by part number (4162KF, 4162KC, 4162XT), the set restores mechanical security and reliable locking function after wear or damage. The kit provides direct-fit replacement for common lock failures and helps return central locking and ignition operation to factory-like condition.

Key Features

• Direct-fit lock set for Citroën C4 Picasso (driver door + ignition barrel) with 1 key included.
• Supplied under Stellantis/Citroën/Peugeot part number references 4162KF, 4162KC, 4162XT — frequently used as search keywords.
• Mechanical replacement intended to renew worn tumblers, broken cylinders or physically damaged door lock assemblies.
• Suitable for professional workshops and competent DIYers; designed to integrate with existing cylinder/mechanism layout.

Usage And Function

The set replaces the mechanical components that secure the driver door and operate the ignition barrel. Door lock assemblies secure the vehicle and interface with the central locking actuator, while the ignition barrel houses the key and switch mechanism to start the engine. In vehicles equipped with an immobilizer transponder in the key, the key may also contain a transponder chip that must be recognized by the immobilizer system for engine start.

Installation Overview

Replacement is straightforward for a trained mechanic. Typical steps:

• Disconnect the negative battery terminal before starting work to avoid electrical shorts and protect electronic modules.
• Remove the interior door trim panel to access the door lock assembly and linkage.
• Disconnect any electrical connectors (central locking actuator) and unbolt the lock mechanism from the door shell.
• Remove the ignition barrel trim and steering column shrouds to access the ignition cylinder; remove retaining clips or bolts and extract the old barrel.
• Install the new door lock and ignition barrel, reconnect linkages and electrical connectors, then test mechanical operation of locks and key turn function before reassembling trim.
• If the key contains an immobilizer transponder, ensure the key is correctly programmed or cloned so the vehicle recognizes it.

Estimated time: typically 1–2 hours for an experienced technician, depending on vehicle trim and workshop equipment.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 Picasso
• Product Codes: 4162KF, 4162KC, 4162XT
• Other Numbers: 4162KF | 4162KC | 4162XT

Installation Recommendations

• Always disconnect the battery before working on the ignition or door electronics to avoid damage to electronic modules.
• Use correct trim removal tools to prevent damage to interior panels and clips.
• Inspect and lubricate linkages and latch mechanisms with appropriate grease during installation to prolong service life.
• When a key transponder is present, have key programming or cloning performed by a qualified locksmith or dealership using the appropriate diagnostic equipment.
• Verify smooth mechanical operation and central locking cycle before reinstalling trim panels.

Most Common Reasons For Failure

• Wear Of Internal Tumblers And Springs: Frequent use causes mechanical wear leading to key jamming or cylinder rotation problems.
• Corrosion And Moisture Ingress: Water entry into door cavities can corrode lock parts and cause sticking or failure.
• Key Damage: Worn or broken keys can damage the barrel or fail to operate the lock correctly.
• Physical Damage: Forced entry attempts, impact or door misalignment can break lock bodies or linkages.
• Central Locking Actuator Issues: Faulty actuators or linkages can make the door lock appear to fail even when the cylinder is functional.

Search by part numbers 4162KF, 4162KC or 4162XT to find the correct replacement quickly. This set is a practical choice for garages and competent DIYers looking to restore secure locking and reliable ignition operation on Citroën C4 Picasso models.