BMW 1 3 X1 Series E81 E87 E90 E91 E92 Ultra Sonic Module Alarm System 9244134

The BMW E81 E87 E90 Ultrasonic Motion Module is a component of the alarm system responsible for monitoring the vehicle's interior using ultrasonic sensors. It enables effective detection of movement within the cabin, increasing the vehicle's security against unauthorized access. This unit is a disassembled unit and is intended for use in select BMW 1 and 3 Series models.

Specifications and technical data

• SKU: 9244134
• Mark: BMW
• Condition: Used
• OEM Part Number: 9244134
• Substitutable numbers: 65759244134, 9244134, 65759200943, 65756972064, 65756946528, 65759149671, 65756974373, 65756963651, 9200943, 6972064, 6946528, 9149671, 6974373, 6963651
• Category: Anti-Theft Car Alarms

Purpose and function in the BMW alarm system

The BMW ultrasonic motion module works with the factory alarm system to monitor the passenger compartment using ultrasonic waves. When the alarm is armed, it monitors changes in the reflected signal, allowing it to detect movement inside the vehicle, such as when a window is broken or a door is opened from the inside.

This component is part of the alarm systems category, so its proper operation directly impacts the vehicle's security. A properly selected and efficient module reduces the risk of false alarms and improves the comfort of everyday vehicle use.

Compatibility and replaceable numbers

The module offered by the manufacturer was designed for integration with the BMW electrical system, which facilitates installation in dedicated E81, E87, and E90 series models. Thanks to the use of interchangeable part numbers, it can be found under various catalog designations, allowing for matching parts based on both the OEM number and reference numbers.

When selecting a module for a specific vehicle, it is recommended to verify compatibility based on the part number and whether the vehicle is equipped with an alarm system. This approach minimizes the risk of incompatibility and reduces the time required for installation in the workshop.

Condition, origin and performance parameters

The module is in used condition, meaning it was dismantled from a BMW vehicle. These types of components are often chosen by workshops and individual users as a cost-effective alternative to new components, while maintaining original build quality and fit.

The low mileage of the vehicle from which the module was removed is crucial. Reduced wear and tear translates into stable electronics performance and greater predictability over the long term. This is particularly important for alarm systems, which must operate consistently and reliably.

Benefits of using the original ultrasonic module

The use of the original ultrasonic module in BMW brings several practical benefits:

• Full integration with the vehicle installation – the module works with the factory alarm and electronics without the need to modify the wiring harness.
• Stable motion detection parameters – carefully selected ultrasonic sensors ensure a predictable system response to actual movement in the cabin.
• Reducing false alarms – proper module operation characteristics reduce the risk of unwanted alarm triggers.
• Savings on service costs – a used, original component is an attractive price alternative to new parts, while maintaining compatibility.

Professional selection and installation at BMW

When replacing the ultrasonic module in a BMW 1 or 3 Series, it's recommended to have it installed by a specialized service center. They will verify the installation, perform alarm system diagnostics, and verify the module's communication with other control units. A properly installed component restores the vehicle's full security functionality, which is crucial for both safety and the vehicle's resale value.

If you are looking for other ultrasonic modules for the BMW alarm system, check out the BMW alarm systems available in our store, where you will find a wide selection of security electronics components for various models of this brand.

More information about BMW electronic modules

When it comes to complex BMW electronic systems, such as iDrive, control modules, and alarm system components, proper fault diagnosis and the selection of appropriate aftermarket parts are crucial. To better understand how to safely use used modules in the 3 and 5 Series, check out the article " Full-Length Driving Pleasure – How to Maintain iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models ," which discusses a practical approach to repairs using original aftermarket components.

If you are interested in a broader perspective on purchasing used electronic components online, including alarm system components, the Safe Buying Used Car Parts Online guide may be helpful – a step-by-step guide describing good practices for selecting parts by numbers and verifying the seller.