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This is a genuine Audi EIS ignition switch module for Audi A6 C6 4F and Audi Q7 4L models. The primary OEM number is 4F0909131E, with alternate reference 33301301. It is the electronic ignition switch unit fitted within the start and authorization system, designed as an original factory component for these vehicles.
The module reads the key signal, communicates with the immobilizer and steering column electronics, and enables the vehicle start sequence when authorization is correct. It plays a central role in ignition switching, terminal control, and the secure handoff between key recognition and engine start functions.
Common signs of a faulty unit include intermittent no-crank issues, failure to recognize the key, ignition not switching on or off correctly, steering lock or start authorization faults, and warning messages related to immobilizer or ignition system operation. These symptoms can appear suddenly or become more frequent over time.
This is a used original part, removed from a vehicle and tested before sale. Match 4F0909131E and 33301301 exactly before ordering. Professional installation is recommended, and coding, programming, or adaptation may be required depending on the vehicle system configuration.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
