Audi A3 S3 8V Engine Start Stop Button Ignition Switch 8V0905217C

Audi A3 S3 8V Engine Start Stop Button Ignition Switch is a factory engine start button from the Switches, control elements and ignition switches group, designed for Audi A3 and S3 8V generation models. It offers convenient, modern engine starting with a single button, while maintaining full integration with the vehicle's original electrical system. This is a solution for users who want to restore the proper operation of the start/stop system while maintaining high-quality OEM parts.

Specifications and technical data

• SKU: 8V0905217C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8V0905217C
• Substitutable numbers: 8V0905217C, 8V0 905 217 C
• Category: Switches & Controls

Purpose and function in the vehicle

The described ignition button is responsible for controlling the electronic starting and stopping of the engine in the start/stop system, working in conjunction with the factory comfort modules and vehicle security systems. As an element from the Switches, control elements and ignition switches group, it is a key link in the ignition circuit, replacing the traditional mechanical ignition switch in more modern Audi A3 and S3 8V configurations.

Thanks to the use of the original OEM design, proper communication with the vehicle's electronics is maintained, which minimizes the risk of system errors and starting problems. This is particularly important in cars equipped with advanced safety and access control systems.

Construction and integration with the Audi system

The start/stop button has been designed specifically for the electrical architecture of the 8V platform, which ensures proper connector fitment, stable mounting in the console, and correct cooperation with the factory software. The materials and finish used are consistent with the Audi interior standard, allowing the element to harmonize with the dashboard and center console.

The original design ensures:

• proper operation of the ignition on/off function,
• consistency with vehicle safety systems,
• adequate resistance to typical operational loads in the cabin.

Use of the used part

The item is offered as a used part, which allows for an economical repair of the starting system while maintaining the quality of the original Audi component. In practice, this means a favorable cost-to-functionality ratio, especially when compared to replacements with uncertain compatibility.

Choosing an original start/stop button from disassembly is often preferred by workshops specializing in the Audi brand, as it allows for the preservation of factory ignition system operating parameters without the need for wiring or software modifications.

Benefits of installation in Audi A3 / S3 8V

Using this button in an Audi A3 or S3 8V allows you to restore full functionality of the starting system while maintaining consistency with other cockpit elements. Original fitment reduces installation time and facilitates service work, and compliance with factory standards translates into stable operation in daily use.

This solution is especially recommended in situations where the existing button has suffered mechanical wear, damage due to intensive use, or electrical failure, and the user expects a part consistent with the factory Audi specification.

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

For users who are simultaneously servicing the braking system and want to consciously choose components from the secondary market, a guide describing the selection of used safety elements may be helpful – you can find detailed tips in the article "Second-hand braking system: how to safely choose discs, calipers, and ABS?".