Audi A3 8P Ignition Switch Lock Barrel Control Module Unit 1K0905851B

Visual condition of the part

The product shows signs of use visible in the photos.

Audi A3 8P Ignition Switch Lock Barrel Control Module Unit is an original component from the Ignition Accessories group, designed to work with the ignition system and steering column lock. The used module ensures factory-standard operating logic, maintaining the precision of the electrical system characteristic of Audi.

Specifications and technical data

• SKU: 1K0905865-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0905865
• Substitutable numbers: 1K0905865, 1K0905851B
• Category: Ignition Modules

Purpose and function in the ignition system

The presented ignition switch with control module is responsible for handling ignition signals, interacting with the steering column lock, and transmitting information to the vehicle's electrical system. As a component integrated with control electronics, it works in close conjunction with comfort and security systems, which is essential for stable engine starting and the proper operation of the onboard electrical system.

Its original Audi origin ensures the correct electrical characteristics, proper mechanical fitment to the steering column, and compatibility with the factory installation architecture in the A3 8P model.

Construction and technical features

The ignition switch with control module forms a compact unit where the mechanical part works directly with the control electronics. This solution reduces the number of connections, facilitates installation, and minimizes the risk of interference in ignition circuits. The design is intended for operation within the steering column, taking into account the mechanical loads resulting from daily use.

The element belongs to the Ignition Accessories group, which means it is designed for resistance to temperature changes, vibrations, and repetitive ignition cycles. Using an original module reduces the risk of communication errors in the electrical system and starting problems.

Benefits of using an original Audi module

Choosing an original component from the Audi OE group translates into a number of practical benefits in daily vehicle operation:

• preservation of the factory operating logic of the ignition system and steering lock,
• proper cooperation with the electrical system and security systems,
• mechanical fitment to the steering column without the need for modifications,
• reduced risk of errors appearing in onboard systems after replacement.

As a result, installing a used, original module is a beneficial solution both technically and economically, especially when repairing the ignition system in older Audi A3 8P vehicles.

Condition, verification, and fitment

The offered item is in used condition, which in practice means it has been removed from a vehicle and is intended for further use after proper installation. Before purchasing, it is worth verifying the module's compatibility with the specific vehicle equipment version to ensure full compatibility with the electrical system and other ignition system components.

The product is marked in the warehouse system as SKU, and identification is also facilitated by the OEM part number and available interchangeable numbers, which allows for selecting the correct variant for a specific Audi A3 8P configuration.

Expansion of the Audi ignition system

If you are planning a comprehensive repair or upgrade of the steering column area and ignition system in your Audi and need other elements from the same group, such as ignition switch inserts, housings, or additional modules working with the ignition, check the available parts in the Audi Ignition Accessories category.

If you want to better understand how using original, used components helps maintain the driving character and consistency of systems in your car, check out the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which discusses the practical aspects of using factory Audi components.