BMW E60 E81 E87 E90 Mini R56 CAS 3 ECU Control Unit Key Reading Module 9217853

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E60 E81 E87 E90 Mini R56 CAS 3 ECU Control Unit Key Reading Module is an advanced electronic control module designed for comfort and security systems in popular BMW 1, 3, 5 series models and Mini. As part of the Electronic control modules and controllers group, it is responsible for the precise management of vehicle functions related to, among others, start authorization and communication with other control units. This is a solution for users looking for a tested component from dismantling, allowing for professional repair of the electrical system.

Specifications and technical data

• SKU: 9217853-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9217853
• Substitutable numbers: 61359395657, 9395657, 61359287535, 9287535, 61359237047, 9237047, 61359217853, 9217853, 61359147226, 9147226, 61359226238, 9226238, 61359147221, 9147221, 61359147191, 9147191, 61359147195, 9147195, 61359147184, 9147184, 61356943834, 6943834, 61356943822, 6943822, 61356943814, 6943814, 61356943797, 6943797, 61356943771, 6943771, 61356943791, 6943791, 61356981416, 6981416, 61356964051, 6964051, 61356943766, 6943766, 61356943811, 6943811, 61356943796, 6943796, 61359136874, 9136874, 61356943830, 6943830, 61356943836, 6943836, 61359147216, 9147216
• Category: ECUs & Computer Modules

Purpose and function of the CAS 3 module

The CAS 3 ECU module in BMW and Mini plays a key role in the vehicle's electronic architecture. It is responsible for:

• handling the access and key authorization system,
• cooperation with other controllers in the vehicle's CAN network,
• coordination of the engine start procedure,
• integration with comfort and security systems.

Thanks to this, a properly selected and configured CAS 3 module allows for restoring full functionality of the electronics in BMW E60, E81, E87, E90 and Mini R56 cars, minimizing the risk of communication errors between controllers.

Compatibility and interchangeable numbers

The offered controller belongs to the family of CAS 3 modules used factory-wide in many equipment variants of BMW and Mini. It has a dedicated OEM part number and an extensive list of interchangeable numbers, which facilitates the selection of the appropriate component for a specific vehicle configuration. The presence of reference numbers in the technical specification allows for verifying compatibility with the existing electrical installation and other controllers in the car.

Thanks to this, the module can be used both as a repair element after an electronics failure and in situations where it is necessary to replace a damaged controller with a fully functional equivalent from the same family.

Benefits of using an original BMW module

Choosing an original CAS 3 module from the Electronic control modules and controllers group provides a number of practical benefits:

• Factory compatibility – a controller designed to work with BMW and Mini installations, without the need for harness modifications.
• Stable communication in the CAN network – correct data exchange with other controllers limits the appearance of errors on the dashboard.
• Possibility of adaptation and programming – the module is adapted to standard coding procedures used in services specializing in the BMW brand.
• Restoration of comfort and security functions – a properly configured CAS 3 restores full functionality of the access and start system.

Product condition and practical application

The offered module comes from dismantling and is intended for re-installation after proper preparation and matching to a specific vehicle. In practice, this means the need to perform programming procedures, synchronization with the key and other controllers, in accordance with the requirements of the manufacturer and diagnostic software used by the workshop.

Such a solution is particularly beneficial for services specializing in BMW electronics and for conscious users who want to reduce repair costs in a controlled manner while maintaining the high quality of the components used.

Substantive support and parts selection

When working with CAS 3 modules, engine controllers or FRM modules, it is worth using reliable sources of knowledge regarding diagnostics and adaptation procedures. Practical tips on how to safely use parts from dismantling in BMW 3 and 5 series models can be found in the article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models.

Expansion of the control system in BMW

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

Summary

BMW E60 E81 E87 E90 Mini R56 CAS 3 ECU Control Unit Key Reading Module is a professional solution for users and workshops that want to effectively restore the efficiency of electronic systems in BMW and Mini vehicles. The original module with an extensive list of interchangeable numbers, intended for reprogramming, provides a solid basis for repairing the access, start and communication system between controllers, ensuring stable operation of electronics in daily use.