Audi TT 8N Interior Headliner Roof Ultrasonic Motion Alarm Sensor 8N8951177

Audi TT 8N Interior Headliner Roof Ultrasonic Motion Alarm Sensor is an original cabin security system component responsible for monitoring movement inside the vehicle. Mounted in the headliner, it works with the factory alarm to provide precise detection of intrusions into the passenger space. This solution is designed for users who want to maintain electronic consistency with the factory installation and keep the vehicle's security system fully functional.

Specifications and technical data

• SKU: 8N8951177
• Mark: Audi
• Condition: Used
• OEM Part Number: 8N8951177
• Substitutable numbers: 8N8951177, 8N8 951 177
• Category: Camera, Monitor & Sensor Kits

Purpose and function in the alarm system

The presented sensor is part of the Cameras, monitoring and sensor kits group, dedicated to monitoring the interior of the first-generation Audi TT (8N). Its task is to detect changes in the cabin space – such as movement – and transmit a signal to the alarm control unit. As a result, the system reacts not only to the opening of doors or the trunk lid but also to breaches of the interior zone, which increases the vehicle's level of protection.

The ultrasonic operating principle allows for effective monitoring of the space without the need to interfere with the interior design. The sensor is mounted in the headliner, in the roof area, which ensures optimal coverage of the entire cabin and stable operation under typical vehicle operating conditions.

Benefits of using an original Audi sensor

Using an original Audi component allows you to maintain full compatibility with the factory alarm and the vehicle's electrical installation. This means:

• proper cooperation with the existing comfort module and alarm controller,
• no need for wiring modifications or adaptation of non-original connectors,
• consistent operation with other sensors and security system components.

For the user, this translates into stable alarm operation, predictable system reactions, and the preservation of factory comfort and safety functions. The original ultrasonic sensor is particularly recommended for post-collision repairs, headliner work, or restoring full alarm functionality after previous modifications.

Condition, installation, and system integration

The item is offered in used condition, which allows for an economical repair of the security system while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a standard verification of the vehicle's electrical installation and the correctness of the connections with the roof wiring harness.

The sensor is designed for installation in the headliner, in the roof area, in the location factory-provided by the manufacturer. Thanks to this, it integrates with the interior without interfering with the cabin's styling, and its operation remains invisible to the user. Proper seating in the headliner is important for the correct detection field and the stability of the ultrasonic operation.

Practical application and part selection

This sensor model is suitable for Audi TT 8N owners who:

• are repairing a faulty alarm system after an interior sensor failure,
• are restoring complete security equipment after headliner removal,
• want to maintain the original electronics configuration without using universal replacements.

When selecting the component, it is worth paying attention to compliance with the manufacturer's markings and the equipment configuration of the specific vehicle. In case of doubts regarding compatibility, advice from specialists and verification by part numbers in the service documentation can be helpful.

To better prepare for your purchase and avoid mistakes when choosing a used alarm component, it is worth using practical expert tips – you will find them in the article No more bad purchases! How to professionally select used car parts.

Expanding the Audi monitoring system

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 additional sensors, motion detection modules, or cabin monitoring components, check out the available parts in the Audi cameras, monitoring and sensor kits category.