Audi A6 C7 A7 4G Alarm Movement Detector Roof Headliner 4G0951177

Audi A6 C7 A7 4G Alarm Movement Detector Roof Headliner is a component from the Electronic control modules and controllers group, responsible for monitoring the vehicle interior within the factory alarm system. Mounted in the headliner, it works with the Audi alarm installation, increasing the level of cabin protection against unauthorized access.

Specifications and technical data

• SKU: 4G0951177-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0951177
• Substitutable numbers: 4G0951177, 4G0 951 177, 4G0 951 177 B, 4G0951177B, 4G0 947 565 A, 4G0947565A
• Category: ECUs & Computer Modules

Function and application of the roof headliner movement detector

The alarm movement detector mounted in the headliner is responsible for monitoring the space inside the car, using integrated electronics to detect unwanted movements after the alarm is armed. As a result, the system reacts to break-in attempts such as breaking a window or opening a door without authorization, which significantly increases the vehicle's security level. The component is designed to work with the factory Audi installation in A6 C7 and A7 4G models, ensuring consistency with the vehicle's original electrical and logical architecture. Integration with the alarm system is carried out via a dedicated connector and appropriate coding in the comfort control units.

Benefits of using an original Audi module

Choosing an original movement detector from the Electronic control modules and controllers group allows for maintaining full compatibility with the communication bus and vehicle software. This means proper cooperation with other comfort modules, no diagnostic errors, and stable operation of alarm functions. The main advantages of using this component include:

• maintaining the factory logic of the Audi alarm system,
• proper cooperation with existing controllers and electrical installation,
• consistency with the factory headliner finish and interior elements,
• possibility of diagnostics using standard Audi service tools.

Technical characteristics and installation integration

The alarm movement detector in the headliner is an electronic module designed to operate in a specific temperature environment and at the Audi installation's onboard voltage. It works with the central controller responsible for handling the alarm and comfort systems, transmitting information about detected movements inside the cabin. The component should be treated as part of the security system, therefore, during installation, it is important to:

• ensure correct seating in the headliner, according to the factory position,
• maintain the proper orientation of the sensor relative to the vehicle interior,
• check the correctness of electrical connections and communication with master modules,
• perform an alarm operation test after installation. Thanks to this, the interior monitoring system maintains full functionality, and the alarm's reaction to cabin intrusion is fast and predictable.

Product condition and service application

The offered alarm movement detector is a used component, which makes it an attractive solution for servicing the security system in Audi A6 C7 and A7 4G vehicles. Such components are often chosen for post-accident repairs, replacing damaged modules after interior flooding, or issues with improper alarm operation. In workshop practice, the sensor can be used both as a replacement for a damaged element and as a part used when completing an alarm installation in vehicles that did not have full interior monitoring from the factory. Proper selection of the module for a specific car configuration is crucial for the correct operation of the entire system.

System expansion and related components

If you are planning a comprehensive repair or upgrade of the interior security zone in your Audi and need other elements from the same group, such as comfort modules, alarm controllers, or additional sensors, check the available parts in the Audi electronic control modules and controllers category. When choosing used electronic modules – including movement detectors, comfort controllers, or alarm system components – it is worth following proven diagnostic procedures and safety rules. A detailed discussion of the topic can be found in the article: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?