Description
Product Overview
High-quality ignition switch, driver door lock and one key supplied as a combined solution for PSA Citroën/Peugeot vehicles. Part number 4162SP originates from a Peugeot 407 and is commonly sought by mechanics and DIYers by its product code.
Function And Benefits
This unit includes the ignition barrel/switch and the driver’s door lock cylinder with a single matching key. The ignition switch routes electrical power to starter, ignition and accessory circuits while the mechanical door cylinder secures entry. Replacing worn components restores reliable starting, correct key operation and door locking.
Symptoms Of Failure And Common Causes
Typical failure symptoms: key won't turn, intermittent ignition contacts, vehicle won't start, door lock stiff or key gets stuck, central locking malfunctions. Common causes include worn tumblers or wafers, electrical wear inside the ignition switch, corrosion, mechanical damage or a broken key.
Replacement Notes
Basic replacement steps: disconnect the battery, remove steering column covers, disconnect the ignition wiring connector, remove retaining screws or clips and withdraw the ignition barrel. For the door cylinder remove the interior door trim, detach linkage and extract the cylinder. Refit with the supplied key to align tumblers; ensure the key operates both the ignition and door lock before reassembly. If unsure, consult the vehicle workshop manual or a professional mechanic.
Technical Information
- Manufacturer: PSA (Citroën/Peugeot)
- Model: Peugeot 407 (unit originates from this model); verify fitment with part codes for Citroën C4 and other PSA variants
- Product Codes: 4162SP
- Other Numbers: No additional numbers provided
Note: Many buyers search by the part number 4162SP. Always confirm compatibility by matching product codes with the vehicle VIN or OEM references before installation.
