Description
Ignition lock cylinder by VAG, catalog number 4B0905851C. Confirmed catalog fitment: Audi A2 8Z0 (2000–2005), Audi A3 8L1 (1996–2003), Audi A4 B5 8D2 (1994–2001), Audi A4 Avant B5 8D5 (1994–2002), Audi A4 B6 8E2 (2000–2005) and other body variants. For an accurate match, compare the number and identification with the removed part and confirm the vehicle specification by VIN. The fitment list is a reference and does not replace a vehicle-specific compatibility check.
An ignition lock is a component of the vehicle starting system designed to activate electrical circuits, unlock the steering column, and start the engine. It connects the ignition key with both the mechanical and electrical starting system and plays a key role in vehicle security.
The ignition lock is installed in the steering column or dashboard and operates together with the electrical switch, immobilizer, engine control unit, and steering lock mechanism. In modern vehicles, it may include electronic modules, an immobilizer antenna, and key recognition systems.
A faulty ignition lock may cause the key to jam, prevent key rotation, stop the engine from starting, cut electrical power, trigger immobilizer faults, or cause intermittent ignition failure.
Our catalog includes ignition locks for many vehicle brands. Available options include genuine factory assemblies, reliable aftermarket replacements, and tested used units without housing damage. Locks with electrical switch, steering lock, key sets, and immobilizer-compatible versions are available.
Used parts are inspected for mechanical function, electrical contact condition, key retention, and absence of excessive play.
Selection is available by VIN number, key type, part number, starting system configuration, and vehicle year. Replacing a faulty ignition lock restores proper engine start operation and vehicle security.
Compatibility
Fits 54 vehicles
Nothing found
About the manufacturer · VAG
VAG is a commonly used abbreviation referring to the Volkswagen Group, one of the largest automotive manufacturers and component producers in the world. The group was founded in Germany and includes many well‑known autom...
About the manufacturer · VAG
VAG is a commonly used abbreviation referring to the Volkswagen Group, one of the largest automotive manufacturers and component producers in the world. The group was founded in Germany and includes many well‑known autom...