BMW E88 E93 Convertible Rollover Bar Protection System Sensor Unit Module 800137

BMW E88 E93 Convertible Rollover Bar Protection System Sensor Unit Module is a specialized component from the Electronic control modules and controllers category, responsible for the precise monitoring and operation of the rollover protection system in BMW 1 Series E88 and 3 Series E93 convertibles. A properly selected module ensures correct cooperation with the vehicle's factory electronics, stable communication with other control units, and predictable response of the passenger protection system.

Specifications and technical data

• SKU: 7164820-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7164820
• Substitutable numbers: 54627164820, 7164820, 800137, 7140906, 54627140906
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented rollover bar sensor module is a component of the body safety system in BMW convertibles, where the rollover bar plays a protective role in critical situations. The controller analyzes signals from vehicle sensors and transmits them to the system responsible for activating the rollover bar, allowing the system to react according to the manufacturer's specifications.

As a part from the Electronic control modules and controllers category, the module communicates with other controllers in the vehicle via a communication bus, which requires maintaining compatibility with BMW's factory electrical architecture. Proper selection based on the model and part number allows for maintaining configuration consistency and avoiding diagnostic errors.

Benefits of using an original BMW module

Using a module sourced from BMW allows for maintaining the factory operating parameters of the safety system without the need for modifications to the electrical installation. This solution is particularly beneficial when:

• repairing after a collision or deployment of the rollover protection system,
• clearing errors stored in controllers related to the body protection system,
• restoring full system functionality after previous unsuccessful repairs.

By maintaining the original controller logic, it is possible to effectively cooperate with factory BMW diagnostic tools, which facilitates adaptation and verification of correct operation after installation. This translates into stable operation of the safety system and reduces the risk of random errors appearing in the controller memory.

Product characteristics and selection by part numbers

The module should be selected based on the OEM part number and available interchangeable numbers, which allows for confirming compatibility with a specific equipment version and vehicle model year. In practice, this means the possibility of matching the controller to both European market vehicles and other markets, provided the manufacturer has indicated numbering compatibility.

The product is labeled as BMW OE, which indicates its origin from the manufacturer's original supply chain, rather than a replacement of unknown origin. Such a choice is particularly important in the case of safety-critical components, where predictable operation and full integration with the rest of the vehicle's electronics are essential.

Condition, installation, and practical aspects

The item is offered in used condition, which in the case of BMW controllers means the possibility of an economical repair while maintaining high manufacturing quality. Before installation, a standard diagnostic procedure is recommended, including reading errors, potential adaptation, and verifying communication with other modules in the vehicle.

In most cases, installation follows a plug-and-play format, maintaining factory connectors and mounting points. After installation, it is worth performing a functional test of the rollover protection system using appropriate service software to confirm proper cooperation of the module with the rest of the system.

Expanding BMW electronics knowledge and expert advice

If you are interested in a broader context of how controllers work in BMW – from the iDrive system, through FRM modules, to engine controllers – it is worth checking out an expert guide describing the use of proven parts from dismantling in the 3 and 5 series: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models.

If you are planning a comprehensive repair or modernization of the body electronics area in your BMW and need other components from the same group, such as comfort controllers, body modules, or sensor systems, check out the available parts in the BMW electronic control modules and controllers category.