Audi A4 B8 A5 8T Engine Ignition Start Stop Switch Button 8K0905217A

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A4 B8 A5 8T 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 vehicle. It allows for convenient control of the ignition function and the start-stop system, ensuring consistency with Audi's factory electrical architecture. This is a practical solution for users who want to restore full functionality of the engine starting system in their car.

Specifications and technical data

• SKU: 8K0905217A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0905217A
• Substitutable numbers: 8K0905217A, 8K0 905 217 A
• Location on the vehicle: Front
• Category: Switches & Controls

Purpose and function of the switch

The presented ignition button is a control element responsible for initiating engine operation and managing the start-stop system in Audi A4 B8 and Audi A5 8T models. Mounted in the front area of the cabin, it works with the vehicle's factory electronic system, allowing the engine to be started without the use of a classic key ignition. This gives the driver quick access to the ignition function and comfortable operation of the engine stop-start system.

Construction and integration with the control system

The button is designed as an Audi OEM component, which means it is fully compatible with factory wiring, panels, and control modules. The switch construction is optimized for installation in the front part of the cockpit, maintaining ergonomic operation and clear access for the driver. The electrical solutions used allow for stable cooperation with the ignition system and the start-stop system, minimizing the risk of communication errors with the vehicle's electronics.

Application in service practice

The component is particularly useful in situations where the existing button has suffered mechanical wear, housing damage, or issues with responsiveness. Replacing it with an original switch from the same component group allows for restoring the correct operation of the engine start and start-stop functions without the need for interfering with the electrical installation. Thanks to the maintenance of the factory manufacturing standard, the installation is predictable, and the risk of incompatibility with other control modules is limited.

Benefits of choosing an original Audi switch

Choosing an original switch from the Switches, control elements and ignition locks category ensures stylistic consistency with the Audi interior and compliance with factory electrical parameters. This solution is particularly beneficial for users who expect predictable ignition system operation, proper cooperation with onboard electronics, and the preservation of the original cockpit character. Using an OEM component also allows for optimizing repair costs while maintaining a high level of functionality.

Expanding the scope of service work

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 additional switches, check the available parts in the Audi switches, control elements and ignition locks category.

When planning broader service work, it is also worth ensuring the efficiency of the braking system, which directly affects driving safety. Practical tips on selecting used brake discs, calipers, and ABS components can be found in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?, which serves as a helpful checklist when purchasing components from specialized stores.