Alarm Module BMW E81 E84 E87 E90 Ultra Sonic System Sensor 6963651

Alarm Module BMW E81 E84 E87 E90 Ultra Sonic System Sensor is an original security system component designed for factory alarm installations in selected BMW 1 and 3 series models. The module is responsible for detecting movement inside the vehicle cabin using ultrasonic sensors, supporting effective protection against unauthorized access. Thanks to its OEM design, it ensures proper cooperation with the vehicle's electronics and maintains factory alarm functions.

Specifications and technical data

• SKU: 6963651
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6963651
• Substitutable numbers: 65759244134, 9244134, 65759200943, 9200943, 65756972064, 6972064, 65756946528, 6946528, 65759149671, 9149671, 65756974373, 6974373, 65756963651, 6963651
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and function of the ultrasonic module

The presented module is a component of the alarm system responsible for monitoring the vehicle's interior based on ultrasonic waves. Once the alarm is armed, it monitors the cabin space and reacts to changes related to movement, which allows for the rapid detection of break-in attempts, broken glass, or doors being opened from the inside. Integration with the factory comfort controller allows for the preservation of the full functionality of the original BMW security system.

Compatibility with BMW E81, E87, E90 series

The module has been designed to work with electrical installations in selected BMW E81, E87, and E90 models, allowing it to be used as a replacement part in the event of a factory sensor failure. Due to its compatibility with the original vehicle architecture, it is possible to:

• maintain correct communication with the vehicle bus,
• work with the existing alarm and central locking system,
• restore factory settings and the logic of the security system.

It is always recommended to verify the selection of the module for a specific body version and model year based on the manufacturer's markings and the vehicle's equipment configuration.

Application of the module in diagnostics and repair

In the event of alarm malfunctions – such as false triggers, lack of reaction to movement in the cabin, or sensor error messages – replacing the ultrasonic module is one of the basic service procedures. This component is suitable both for security system repairs and for restoring factory equipment after previous modifications or alarm removal.

Due to the nature of the module's operation, its correct placement and proper connection to the electrical system are essential. Installation in accordance with BMW service documentation or commissioning the work to a specialized automotive electronics workshop is recommended.

Product characteristics and condition

The offered module comes from the group of original BMW components, which translates into proper fitment with electrical harnesses, mounting brackets, and vehicle software. The element is used, making it an economical solution while maintaining compatibility with the factory system. This type of part is particularly useful in vehicles where the priority is to maintain the original equipment configuration rather than using universal replacements.

Support with selection and additional information

When selecting an ultrasonic module for a specific BMW vehicle, it is worth paying attention to the alarm configuration, model year, and equipment version to ensure full compatibility with the vehicle's electronics. In case of doubt, comparing the currently installed element with the offered product and consulting a diagnostician specializing in the BMW brand may be helpful.

If you are planning a comprehensive repair or upgrade of the interior security zone in your BMW and need other elements from the same group, such as sensors, control modules, or additional alarm components, check the available parts in the Other BMW category.

For drivers interested in comparing technical solutions used in sports models of other brands, including advanced drivetrain and braking systems, the article on our blog may be useful: Audi RS vs other models – what is hidden under the hood and chassis?.