Control Unit BMW E60 E81 E82 E87 E90 E91 E92 ECU Key Reading Module CAS3 9147220

Visual condition of the part

The product shows signs of use visible in the photos.

Control Unit BMW E60 E81 E82 E87 E90 E91 E92 ECU Key Reading Module CAS3 is an original electronic control module from the Electronic control units and controllers category, designed to support the CAS3 system in selected BMW E-series models. It is responsible for advanced key handling, ignition authorization, and communication with other vehicle control units, which is crucial for the safety and proper operation of the electrical system. This used OEM component allows for professional repair of the comfort and ignition system without the need for unreliable aftermarket replacements.

Specifications and technical data

• SKU: 9147220-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9147220
• Substitutable numbers: 9147220, 61359147220, 9147212, 61359147212, 9147196, 61359147196, KD, 61359395657, 9395657, 61359226238, 9226238, 61359217853, 9217853, 61359147226, 9147226, 61359147221, 9147221, 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
• Category: ECUs & Computer Modules

Purpose and function of the CAS3 module

The presented CAS3 module is an element of the electronic system responsible for key reading, driver authorization, and transmitting signals to the engine control unit and other components. In practice, this means that a correctly selected and configured module ensures stable ignition, proper operation of comfort functions, and consistent communication within the vehicle's CAN network.

The module is dedicated to selected BMW E-series models (including E60, E81, E82, E87, E90, E91, E92), which allows for maintaining the factory electrical architecture and minimizes the risk of compatibility issues. Using an original controller from this category is particularly important for repairs related to the immobilizer, ignition problems, or communication errors between control units.

Benefits of using an original BMW module

Choosing an original BMW CAS3 module from the Electronic control units and controllers category provides a number of practical benefits:

• maintaining the factory logic of the comfort and ignition system,
• consistency with the software and electrical architecture of a specific BMW generation,
• possibility of professional adaptation and programming using standard BMW diagnostic tools,
• reducing the risk of communication errors in the CAN network and immobilizer problems.

Thanks to this, the module is a suitable choice both for post-failure repairs and for replacing a damaged controller with a functional OEM unit with a similar hardware configuration.

Condition, origin, and installation aspects

The offered module is a used part, sourced from dismantling, which allows for combining reasonable repair costs with the preservation of original BMW quality. Such controllers are frequently chosen by workshops specializing in the brand because they enable an economical yet technically correct restoration of the CAS3 system.

Before installation, the module requires standard service procedures, such as matching it to a specific vehicle, potential programming, and synchronization with other control units. Installation by a specialized service center or an automotive electrician who has the appropriate diagnostic software and experience working with BMW electronics is recommended.

Selection by part numbers and compatibility

The module has a dedicated OEM part number and an extensive list of interchangeable numbers, which facilitates precise selection of the component for a specific equipment version and vehicle year. Before purchasing, it is worth verifying compatibility by part number, reference numbers, or based on vehicle data (VIN) to ensure full hardware and software compatibility.

If you need practical tips on selecting used controllers, HW/SW compatibility rules, and installation procedures, check out the guide: Used automotive electronics – how to safely select second-hand ECU modules and sensors. This is a helpful source of knowledge when planning a repair of the CAS3 system in a BMW.

Repair expansion and related elements

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 additional controllers, comfort modules, or ECU units, check the available parts in the BMW electronic control units and controllers category.

For larger service tasks, it is also worth considering the impact of using original used components on the future value of the vehicle – you can find more on this topic in the article: Original used parts vs. car resale value.

Summary

Control Unit BMW E60 E81 E82 E87 E90 E91 E92 ECU Key Reading Module CAS3 is a specialized OEM module designed to support the CAS3 system in selected BMW E-series models. The used controller allows for a professional and economical repair of the ignition and comfort system, while maintaining the factory logic of the vehicle's electronics. It is a sensible choice for workshops and users who prioritize original solutions and want to restore full functionality of the electronic system in their BMW.