Audi S5 F5 Ignition Start Stop Button Switch 3.0 TFSI Petrol 8W2905217C

The Audi S5 F5 3.0 TFSI Ignition Start/Stop Button is an original part from the Switches, Controls, and Ignition Switches group, designed for gasoline-powered vehicles. It provides convenient, modern engine starting and seamless integration with Audi's factory electronics, serving as a functional solution for replacing a worn or damaged button.

Specifications and technical data

• SKU: RHD-8W2905217C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W2905217C
• Substitutable numbers: 8W2905217C, 8W2 905 217 C, 10139399
• Fuel type: Petrol
• Part type: Push Button
• Category: Switches & Controls

Application and Function in the Ignition System

The Start/Stop button controls the engine start and stop procedure in a keyless system, working in conjunction with comfort modules and the engine control unit. In a vehicle with a 3.0 TFSI gasoline engine, it acts as a user interface that transmits a signal to the ignition system, replacing the traditional mechanical ignition switch.

Thanks to its factory design, the component is tailored to the interior architecture of the Audi S5 F5, maintaining an ergonomic position on the center console and offering clear, intuitive operation. Appropriately selected electrical parameters ensure correct compatibility with the vehicle's electrical system without the need for wiring modifications.

Compatibility and Integration with Audi Electronics

Original origin from the Audi brand signifies adherence to factory quality and electronic communication standards. The button is designed to operate within the vehicle's network, interacting with safety systems, the immobilizer, and the starting system, which minimizes the risk of errors and warning messages on the instrument cluster.

The component is intended for gasoline-powered cars, which is important for the configuration of the engine control unit and the logic of the Start/Stop system. Using the correct switch ensures the proper starting sequence and predictable operation of the engine shut-off function upon button press.

Performance Characteristics and Installation

As part of the Switches, Controls, and Ignition Switches group, the Start/Stop button is designed for installation in the factory location, utilizing original mounting points. The plug-and-play design facilitates service work – after correctly connecting the electrical connector, the component can be immediately verified for operation in the vehicle.

The used condition allows for an economical replacement of a damaged button while maintaining the original manufacturer's specifications. This is a practical solution in situations where the existing component shows signs of wear, such as no response to pressing, intermittent operation, or mechanical damage to the housing.

Why Choose This Start/Stop Button

Choosing an original ignition switch for the Audi S5 F5 primarily ensures reliable compatibility with the electrical system and preserves the factory functionality of the keyless system. A used OEM part helps maintain a consistent interior appearance while reducing repair costs compared to a new part.

If you are planning a comprehensive repair or upgrade of the ignition control area in your Audi and need other parts from the same group, such as function buttons, console switches, or ignition switch modules, check the available parts in the Audi Switches, Controls, and Ignition Switches category.

Vehicle System Safety – Practical Knowledge

When working on control systems and electrical installations, it is advisable to be aware of good service practices, especially concerning driving safety. If you are interested in how to responsibly approach the purchase of safety-related components, such as brake system components, the following guide will be helpful: Used Brake Systems: How to Safely Choose Discs, Calipers, and ABS?.