BMW E81 E87 E90 E91 E92 CAS 3 Key Reading Module Control Unit ECU 9147196

Specialist coding required

The item offered is a module that requires coding in the vehicle by a specialist.

The module is not plug&play.

BMW E81 E87 E90 E91 E92 CAS 3 Key Reading Module Control Unit ECU is an advanced component from the Electronic control modules and ECUs category, responsible for managing key comfort and safety functions in BMW 1 and 3 Series vehicles. This controller comes from the original BMW line, ensuring a perfect fit for the electrical system and seamless integration with other vehicle systems.

Specifications and technical data

• SKU: 9147196
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9147196
• Substitutable numbers: 61359147212, 9147212, 61359395657, 9395657, 61359147220, 9147220, 61359147196, 9147196, 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 CAS 3 module

The CAS 3 module acts as a central controller responsible for start authorization, key handling, and interaction with security systems in selected BMW E81, E87, E90, E91, and E92 models. As a component from the Electronic control modules and ECUs category, it integrates signals from multiple sub-assemblies, ensuring consistent operation of comfort and safety systems, as well as communication with other vehicle control units.

Thanks to its design compliant with manufacturer standards, the CAS 3 module is prepared for operation in the demanding environment of BMW electrical installations, maintaining parameter stability and proper cooperation with the vehicle's factory software.

Benefits of using an original BMW module

Using an original CAS 3 controller to replace a damaged or unstable unit allows for the restoration of proper operation of the ignition system and functions related to the key and immobilizer. Proper fitment to the BMW electrical architecture reduces the risk of communication errors between modules and coding issues.

The main advantages of using this controller include:

• maintaining consistency with the factory BMW electrical installation,
• the possibility of professional adaptation and coding at a specialized service center,
• stable operation within the existing vehicle control unit network.

The offered item is in used condition, which allows for cost-effective repair while maintaining the original manufacturer's specifications.

Selection and compatibility within the BMW range

Before purchasing the CAS 3 module, it is recommended to verify compatibility with the specific equipment version and vehicle model year, as well as to plan its adaptation in the vehicle (coding, potential key matching). The controller should be treated as a component requiring professional service handling, especially in the context of security systems and communication with other modules.

The product has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification in BMW catalogs and the selection of the correct variant for a specific car. This helps minimize the risk of purchasing an incompatible controller and speeds up the repair process.

BMW electronic control modules – expansion and repairs

If you are planning a comprehensive repair or upgrade of your BMW's onboard electronics and need other components from the same group, such as comfort controllers, light modules, or engine ECUs, check out the available parts in the BMW electronic control modules and ECUs category.

To better assess when choosing a used CAS 3 controller is justified and how to safely approach purchasing second-hand electronics, it is worth reading our guide: Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?