BMW 3 X1 Series E84 E91 E91N LCI Control Unit Sliding Lifting Roof 6955927

BMW 3 X1 Series E84 E91 E91N LCI Control Unit Sliding Lifting Roof is an original component from the Electronic control modules and controllers group, designed for precise control of the sunroof movement in selected BMW 3 Series and X1 models. It enables smooth sliding and lifting of the roof panel, ensuring comfortable operation and consistent performance with the vehicle's factory electrical installation.

Specifications and technical data

• SKU: 6955927
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6955927
• Substitutable numbers: 61359137054, 9137054, 61359128175, 9128175, 61356955927, 6955927
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented module is dedicated to the sunroof control system in BMW E84 and E91 / E91N LCI models, where it is responsible for the logic of the sliding and tilting mechanism. As a component integrated with the comfort system, it works with the control button in the headliner and other body systems, ensuring consistent operation of the sunroof opening, closing, and positioning functions. Thanks to its factory design, the module maintains proper operating parameters, such as end-position control, response to short and long button presses, and cooperation with anti-pinch safety features, if provided in the specific vehicle configuration.

Application in the BMW electrical system

As an element from the Electronic control modules and controllers category, the sunroof module acts as a controller mediating between the electrical installation and the sunroof drive motor. It is responsible for:

• interpreting signals from the control button,
• controlling the direction and operating time of the drive,
• storing sunroof operating positions,
• coordinating operation with other comfort systems in the vehicle. This solution allows for maintaining factory functionality, including smooth closing and repeatable positioning of the sunroof in intermediate positions, in accordance with the logic provided by the manufacturer.

Benefits of using an original used module

An original BMW module from dismantling is a solution that allows maintaining compatibility with the vehicle's factory electrical architecture. Thanks to this:

• proper fitment to the wiring harness and connectors is maintained,
• the controller works with the existing equipment configuration,
• the risk of communication errors in the vehicle network is minimized. A used OEM component is also a cost-effective alternative to new parts, especially for sunroof repairs, where both efficiency and compatibility with the software and installation of a specific BMW generation are important.

Professional installation and diagnostics

Due to the nature of the controller, installation by a workshop with experience in BMW electronics and access to appropriate diagnostics is recommended. In many cases, after replacement, it may be necessary to:

• perform an adaptation or initialization procedure for the sunroof,
• clear any errors stored in the comfort system memory,
• verify the correct operation of all sliding and lifting functions. Such an approach allows for restoring full sunroof functionality and ensuring stable system operation in the long term.

Expanding knowledge about BMW electronic modules

If you want to better understand how comfort controllers, body modules, and multimedia systems work in BMW 3 and 5 Series, and how to safely use parts from dismantling, it is worth reaching for specialized materials. Practical tips regarding the repair of the iDrive system, FRM modules, or engine controllers can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models using parts from dismantling?. If you are planning a comprehensive repair or modernization of the electrical comfort system area in your BMW and need other components from the same group, such as body controllers, comfort modules, or window controllers, check the available parts in the BMW electronic control modules and controllers category.