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 original component from the Electronic control modules and ECUs group, designed for advanced management of comfort and safety functions in selected BMW 1 and 3 Series models. The CAS 3 module works with the vehicle's electrical system, ensuring consistent operation of electronic systems and stable communication with other control units.

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 BMW E81 E87 E90 E91 E92 CAS 3 Key Reading Module Control Unit ECU plays a key role in the electronic architecture of the BMW E81, E87, E90, E91, and E92, responsible for handling selected vehicle access functions, ignition, and cooperation with other ECU controllers. It is a component designed by BMW for precise integration with the factory wiring harness and communication buses in the car. By using an original module from this series, compatibility with the vehicle's software is maintained, which facilitates configuration, coding, and potential adaptation during service. This solution is particularly valued in professional workshops specializing in BMW electronics.

Benefits of using an original BMW module

Using a factory-original CAS 3 controller to replace a damaged or unstable component allows for restoring the proper operation of electronic systems without the need for interference with the vehicle's installation. The original module provides:

• consistency with the factory electrical architecture of the BMW 1 and 3 Series,
• the possibility of professional coding and diagnostics using standard service tools,
• stable cooperation with other control units in the vehicle. For the user, this means more predictable operation of electronic systems and a reduction in the risk of problems resulting from the use of non-original replacements. In the case of BMW vehicles, where electronics are highly integrated, choosing such a component is a technically safe and long-term cost-effective solution.

Product characteristics and condition

The offered module belongs to the Electronic control modules and ECUs group and comes from dismantling, which allows for combining an attractive price with the preservation of the manufacturer's original specifications. A used element of this type is frequently chosen by workshops specializing in the BMW brand, especially for repairs where hardware compatibility and the possibility of further programming are important. Before installation, a standard service procedure is recommended, including diagnostics, potential coding, and matching to the specific vehicle. Thanks to this, the CAS 3 module can be effectively integrated into the car's existing electronic infrastructure, restoring the proper operation of related systems.

Selection and compatibility of the CAS 3 controller

When selecting a CAS 3 controller for a BMW E81, E87, E90, E91, or E92, it is crucial to pay attention to compatibility with the specific vehicle configuration and software. The module has an assigned OEM part number and an extensive list of interchangeable numbers, which facilitates matching the appropriate variant to a given model year and equipment version. In workshop practice, manufacturer catalogs and diagnostic tools are often used to confirm compatibility before installation. This way of working minimizes the risk of communication errors between control units and allows for maintaining full functionality of electronic systems after replacement.

More about BMW electronics – knowledge for users and workshops

If you want to better understand how the repair and configuration of BMW electronic modules – including comfort controllers, iDrive systems, or engine ECUs – work in practice, it is worth reaching for specialized materials. Practical tips on working with used electronic components 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 using parts from dismantling?

Related BMW Electronic control modules and ECUs

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