Audi A4 B8 A5 8T Q5 8R Red Engine Ignition Start Stop Switch Button 8K0905217C

Visual condition of the part 

The product shows signs of use visible in the photos. 

Audi A4 B8 A5 8T Q5 8R Red Engine Ignition Start Stop Switch Button is an original component from the Switches, control elements and ignition locks group, designed for installation in the front part of the cockpit. The distinctive red color emphasizes the sporty character of the interior, and its factory origin from the Audi brand ensures stylistic and functional consistency with other dashboard elements.

Specifications and technical data

• SKU: 8K0905217C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0905217C
• Substitutable numbers: 8K0905217C, 8K0 905 217 C
• Location on the vehicle: Front
• Color: Red
• Category: Switches & Controls

Purpose and function of the Start Stop button

The red ignition button is responsible for starting and stopping the engine in Audi vehicles equipped with a keyless system. Located in the front part of the center console or dashboard, it provides the driver with quick access and clear operation during daily use.

The element was designed specifically for Audi A4 B8, A5 8T, and Q5 8R models, ensuring a proper fit with factory panels and mounting frames. The red finish improves button visibility, which facilitates intuitive use of the ignition function even in low-light conditions.

Construction, color scheme and ergonomics

The button belongs to the Switches, control elements and ignition locks group, meaning it is an integral component of the ignition control system. The design, intended for installation in the front cockpit zone, ensures stable seating in the panel and proper travel movement when pressed.

The red color creates a clear contrast against the typical dark interior panels of Audi, which improves operational ergonomics. At the same time, the brand's characteristic, understated design is maintained – the button does not visually dominate, but serves as a clear, functional accent in the driver's zone.

Condition, origin and service application

The offered button is a used item, which in practice means it comes from vehicle dismantling and can be an attractive cost-effective alternative to a new OEM component. For many Audi users, this is a sensible way to restore full functionality to the ignition system while maintaining the original interior look.

Replacing the Start Stop button is particularly justified in cases of mechanical wear, fading of markings, or issues with pressure response. Using an original element from the same model group minimizes the risk of fitment issues and allows for consistency with the factory electrical installation.

Benefits of using an original Audi button

• Visual consistency with the dashboard and front panels in Audi A4 B8, A5 8T, and Q5 8R models.
• Red color improving readability and ergonomics of the Start Stop button operation.
• An element from the switches and ignition locks group, designed to work in the factory Audi ignition system.
• Possibility of economical repair of the engine starting system while maintaining an original component.

Expanding the control system in your Audi

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

When selecting used control elements, it is also worth familiarizing yourself with the principles of choosing original parts from dismantling – you will find practical tips in the article Used parts for Mercedes - original parts from dismantling, which discusses the general benefits and criteria for evaluating such components, also useful for users of other premium brands.