Audi A6 C6 Q7 4L Ignition Starter Barrel Lock Switch 4F0909131D

Audi A6 C6 Q7 4L Ignition Starter Barrel Lock Switch is an original vehicle starting system component designed for selected Audi models. This used ignition switch module allows for maintaining the factory logic of the ignition system, which is particularly important when performing electronic repairs in premium class vehicles.

Specifications and technical data

• SKU: 4F0909131D
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0909131D
• Substitutable numbers: 4F0909131D, 4F0 909 131 D, 4F0 910 132 F, 4F0910132F
• Part type: Bootlid
• Category: Boot & Hatch Lids

Purpose and function in the vehicle

The presented ignition switch module is responsible for handling the key and transmitting signals to the vehicle's electronic systems. In Audi A6 C6 and Q7 4L models, this component interacts with the body electrical system, security systems, and the engine starting circuit, ensuring consistent operation of all related sub-assemblies.

By using an OEM solution, the correct mounting points, compatibility with the wiring harness, and proper communication with other vehicle control units are maintained. This is especially critical for repairs where compatibility with the factory electronic architecture is essential.

Benefits of using an original ignition switch module

Using an original ignition switch module in an Audi A6 C6 or Q7 4L reduces the risk of communication issues within the vehicle network and errors in comfort and security systems. A component from the same design family is matched in terms of:

• geometry and mounting method in the steering column or dashboard area,
• electrical connectors and pins used,
• software interacting with the vehicle's electronics.

For the user, this means greater predictability of operation after replacement and the ability to maintain factory functions related to key handling.

Product characteristics and condition

The offered ignition switch module comes from disassembly and is marked as a used original Audi component. Such components are a popular choice for premium vehicle repairs because they allow for maintaining consistency with factory specifications while reducing costs compared to new parts.

A used ignition switch module is a good solution in situations where the existing component has suffered mechanical or electronic damage, and the priority is to restore the correct operation of the starting system without interfering with the installation design.

Application in the rear body area

The product is assigned to the Tailgates and rear parts group, which in practice means it is associated with the rear body zone in the context of vehicle equipment assembly. In the case of extensive rear-end repairs – covering both mechanical and electrical elements – selecting the right OEM components allows for maintaining the consistency of comfort, lighting, and security systems.

If you are planning a comprehensive repair or upgrade of the rear body zone in your Audi and need other elements from the same group, such as locks, actuators, or wiring harnesses, check the available parts in the Audi Tailgates and rear parts category.

Technical support and knowledge of the used parts market

When selecting used OEM components for premium cars, it is worth considering the current market situation and the specifics of electronics in modern vehicles. If you want to better understand why original components from disassembly are becoming an increasingly popular choice for servicing high-end cars, read the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.

By taking a conscious approach to selecting electronic modules, such as the ignition starter barrel lock switch, you can effectively combine technical requirements with reasonable repair costs while maintaining the character and functionality of your Audi vehicle.