BMW Z4 E85 E86 Roadster Cruise Control Switch Control Unit Module 6940989

BMW Z4 E85 E86 Roadster Cruise Control Switch Control Unit Module is an original component from the Switches, control elements and ignition locks group, designed for precise control of the cruise control function in your roadster. The used control module ensures factory compatibility with the BMW electrical system, maintaining proper operating logic and ergonomic handling.

Specifications and technical data

• SKU: 6940989
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6940989
• Substitutable numbers: 61316920716, 6920716, 61316940989, 6940989, EM
• Color: Black
• Category: Switches & Controls

Purpose and function in the control system

This cruise control module has been designed specifically for the BMW Z4 E85/E86 Roadster generation, allowing it to work with the vehicle's factory electronics without the need for wiring modifications. It is responsible for precise activation, maintaining, and adjusting driving speed, which increases comfort on longer trips and allows for more stable vehicle handling.

As a component integrated into the control system, the switch communicates with other vehicle modules, transmitting signals in accordance with BMW's factory parameters. This solution allows for maintaining consistent operation of driver assistance systems and reduces the risk of diagnostic errors.

Construction, color scheme, and interior fitment

The module housing is finished in black, which facilitates aesthetic integration with the dashboard and steering column of the BMW Z4. This color scheme is characteristic of the original interior components of this series, ensuring the switch does not stand out visually and maintains a cohesive cockpit look.

As a part from the Switches, control elements and ignition locks group, the module has been constructed with frequent use in mind, featuring clearly tactile operating positions. This facilitates intuitive use of the cruise control without taking your eyes off the road, which is important for both comfort and driving safety.

Benefits of using an original BMW module

Choosing an original cruise control switch for the BMW Z4 E85/E86 offers a number of practical advantages:

• factory fitment to the BMW electrical installation and electronic architecture,
• maintenance of proper cooperation with other control modules in the vehicle,
• ergonomic arrangement of functions and predictable button operation,
• consistent appearance with other control elements in the interior.

Thanks to this, you maintain the original character of the control system, minimizing the risk of compatibility issues that may arise when using replacements with uncertain parameters.

Condition, origin, and practical application

The item is offered as a used part, which represents a reasonable compromise between cost and maintaining the original BMW specification. Such modules are frequently chosen both for repairs following a cruise control failure and for replacing missing components in vehicles after modifications or steering column replacements.

Before installation, it is recommended to perform a standard verification of the installation and diagnostics of the control system to confirm proper communication of the module with the rest of the system. This approach facilitates subsequent operation and limits the need for additional interference with the vehicle's electronics.

Expanding the control system in your BMW

If you are planning a comprehensive repair or upgrade of the control zone in your BMW and need other elements from the same group, such as stalks, button modules, or ignition locks, check out the available parts in the BMW Switches, control elements and ignition locks category.

When working with electronic and control systems in a car, it is worth knowing the best practices for selecting used components. A guide describing how to safely choose components from key vehicle systems may be helpful – you can find it in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?, which discusses universal principles for assessing the condition and quality of used subassemblies.