BMW X5 Series E53 Interior Roof Alarm Sensor Ultra Sonic Module 8379941

BMW E53 X5 Ultrasonic Sensor Module 8379941 is an original security system component designed to work with the factory BMW vehicle electronics. This specialized ultrasonic module ensures precise motion detection inside the car, supporting the alarm system's operation and enhancing security. Thanks to its OEM design, you maintain full compatibility with the electrical system and control logic of the X5 E53 model, which translates to stable and predictable system performance.

Specifications and technical data

• SKU: 8379941-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8379941
• Substitutable numbers: 65758379941, 8379941
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function of the Ultrasonic Module

The ultrasonic sensor module in the BMW X5 E53 is responsible for monitoring the cabin space when the alarm is armed. It uses ultrasonic waves to detect changes in the environment, allowing the security system to react quickly in case of unauthorized movement inside the vehicle. Precise detection minimizes the risk of false alarms and improves overall protection effectiveness.

As an original BMW part, the module is optimized for the specific electrical and software architecture of the X5 generation, facilitating diagnostics and integration with existing body control modules.

Benefits of Using an Original BMW Module

Using the factory ultrasonic module in the BMW X5 E53 offers a number of practical advantages:

• maintaining full compatibility with the factory alarm and comfort system,
• stable cooperation with the vehicle bus and other control units,
• easier diagnostics using dedicated BMW service software,
• consistency of operating parameters with other installation components.

This ensures that the overall reliability of the security system remains at the level intended by the manufacturer, without the need for modifications to wiring harnesses or software.

Characteristics of a Used Part

The offered module is a used part, meaning it has been previously operated in a vehicle. Such electronic components, if they functioned correctly in the previous car, retain their functional properties and can be reused as a replacement for a damaged module. Choosing a used OEM component is a cost-effective solution while maintaining the original manufacturer's specifications.

Before installation, standard service procedures are recommended: checking connectors, proper seating in the installation, and verifying operation by testing the alarm system after installation.

Installation and Integration with the BMW X5 E53 System

The ultrasonic sensor module is designed as a component intended for a specific vehicle platform, which facilitates its installation in the designated location in the cabin or headliner (depending on the car's configuration). Thanks to factory connectors, installation involves simply plugging into the existing wiring harness and securing it at the original mounting points.

After connection, the module communicates with the central body control module, and its operation can be verified by activating the alarm and testing its response to movement inside the vehicle. A correctly selected module does not require additional installation modifications or mechanical adaptations.

Related Components and Security System Development

When upgrading or repairing the alarm system in a BMW X5 E53, it is also worth considering the condition of other components, such as the alarm siren, door opening sensors, or comfort modules. If you are looking for other body and security electronics for BMW that will complement the function of this ultrasonic module and allow you to build a cohesive vehicle protection system, check the available parts in the Other BMW category.

To compare solutions used in different brands and segments, and to better understand how manufacturers differentiate the design of powertrains and their accompanying electronics, an article describing sporty Audi versions may be helpful – you can find it here: Audi RS vs Other Models – What Lies Under the Hood and Chassis?.