Volkswagen Caddy Maxi Ignition Switch Lock Control Module + Key 1K0905851

Volkswagen Caddy Maxi Ignition Switch Lock Control Module + Key is a factory-original component from the Ignition Accessories group, designed for the starting system and steering column lock in Volkswagen vehicles. Integrating the ignition switch with the lock control module and the included key ensures consistent operation of the ignition system and central locking, which facilitates both service and subsequent operation.

Specifications and technical data

• SKU: 1K0905851B-11
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 1K0905851B
• Substitutable numbers: 1K0905851B, 1K0 905 851 B, 5K0837202EJ, 5K0 837 202 EJ, 1K0905851, 1K0 905 851
• Part type: Ignition Module
• Category: Ignition Modules

Purpose and function in the vehicle

The presented ignition switch set with the lock control module and key is responsible for handling the ignition, authorizing engine start, and interacting with the steering lock system. As an original Volkswagen component, it has been designed for a precise fit with the steering column, wiring harness, and onboard electronics architecture in the Caddy Maxi model. Combining the mechanical part (ignition lock cylinder and key positions) with the electronic lock control module allows for maintaining the correct logic of the ignition system, including handling accessory positions, ignition power supply, and signals transmitted to the body control modules.

Benefits of using an original module

Using an original ignition switch module with a lock in a Volkswagen vehicle reduces the risk of communication issues within the vehicle bus and minimizes the need for installation modifications. The product from the Ignition Accessories group provides:

• mechanical consistency with the steering column and ignition switch housing,
• predictable cooperation with factory body control modules,
• easier diagnostics in the event of potential ignition system faults,
• the ability to maintain factory logic for key operation and ignition positions. As a result, replacing a damaged ignition switch or lock module with a component from the same family of parts is a technically safe and service-predictable solution.

Characteristics and condition of the item

The offered set comes from disassembly and is marked as used, which in practice means it retains its original construction and operating parameters while offering cost-effectiveness compared to new components. For workshops specializing in the Volkswagen brand and individual users, this represents a reasonable compromise between quality and repair budget. The presence of the key in the set facilitates further programming and adaptation work on the vehicle, as the mechanical part of the ignition system is already matched to the ignition lock cylinder. In practice, this shortens installation time and limits the number of additional locksmith operations.

Identification and vehicle compatibility

For the correct selection of parts for a specific Caddy Maxi unit, it is crucial to compare data such as SKU, OEM part number, and available interchangeable numbers with information in the vehicle documentation or catalog software. This allows for confirming the module's compatibility with the model year, equipment version, and the electronic system used. This approach is particularly important for components integrated with body electronics, where differences in versions can affect communication with other control units and the correct operation of the immobilizer.

Selection support and system expansion

If you are planning a comprehensive repair or upgrade of the starting and lock control area in your Volkswagen and need other elements from the same group, such as ignition switch inserts, control modules, or additional ignition-related components, check the available parts in the Volkswagen Ignition Accessories category. For users who want to deepen their knowledge about selecting factory components and the impact of original parts on the durability of drive systems and suspension, an article describing the practical aspects of using OEM elements may be helpful – you can find it here: Repairing Quattro drive and suspension in Audi models – why it is worth choosing used factory parts.