BMW E60 E81 E87 E90 E91 CAS 3 Control Unit ECU Key Reading Module CAS3 9147195

BMW E87 CAS Control Unit 9147195 is a key electronic component responsible for managing vehicle access and starting functions in the E87 series. This genuine control unit from the Electronic Control Units and Controllers group ensures consistency with BMW's factory electrical architecture, translating to stable operation of comfort and safety systems. It's a solution for users looking to restore proper CAS system functionality without compromising compatibility.

Specifications and technical data

• SKU: 9147195
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9147195
• Substitutable numbers: 61359147195, 9147195, 61359147199, 9147199, 61356943830, 6943830, 61359147184, 9147184, 61356943834, 6943834, 61356943836, 6943836, 61359147173, 9147173, 61359395657, 9395657, 61359226238, 9226238, 61359217853, 9217853, 61359147226, 9147226, 61359147221, 9147221, 61359147191, 9147191, 61356943822, 6943822, 61356943814, 6943814, 61356943797, 6943797, 61356943771, 6943771, 61356943791, 6943791, 61356981416, 6981416, 61356964051, 6964051, 61356943766, 6943766, 61356943811, 6943811, 61356943796, 6943796, 61359136874, 9136874
• Category: ECUs & Computer Modules

Role of the CAS Module in BMW E87

The CAS module in the BMW E87 is responsible for key authorization, engine start/stop function management, and integration with other vehicle control units. A correctly selected and functional control unit enables:

• stable key recognition and proper vehicle unlocking,
• seamless engine starting,
• correct communication with the CAN network and other comfort modules.

By maintaining the original BMW architecture, the CAS module minimizes the risk of communication errors and unwanted messages on the instrument cluster.

Compatibility and Interchangeable Numbers

The offered CAS control unit is a BMW branded component and features a dedicated OEM part number and a set of interchangeable numbers, facilitating the selection of the appropriate variant for a specific vehicle configuration. The presence of multiple reference numbers allows the module to be matched with various model years and equipment versions of the BMW E87, while maintaining compatibility with the factory electrical system.

Before purchasing, it is advisable to compare the markings on your old control unit with the data in the specifications to ensure full compatibility with the existing wiring harness and other control units in the car.

Condition, Origin, and Advantages of Using OEM

The module originates from the BMW OE group, meaning it is an original part used in the manufacturer's vehicles from the factory. As a used part, it retains the factory design and operating parameters intended by BMW engineers, which is particularly important for sensitive electronic systems like the CAS.

Using an original control unit to replace a damaged or unstable component allows for:

• maintaining software and vehicle configuration consistency,
• reducing adaptation and coding issues compared to aftermarket alternatives,
• preserving predictable behavior of safety and comfort systems.

Practical Installation and Operational Tips

Replacing the CAS module in a BMW E87 requires access to appropriate diagnostic tools and experience with automotive electronics. Due to its connection with the immobilizer and key recognition system, programming and synchronization procedures with other control units are necessary after installation.

For a stable repair outcome, it is recommended to entrust the installation and configuration to a specialized service center that uses software dedicated to BMW. This helps to reduce the risk of vehicle starting problems, CAN communication errors, or malfunctioning comfort features.

Expanding 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 components from the same group, such as comfort modules, engine control units, or body control units, check the available parts in the BMW Electronic Control Units and Controllers category.

To compare how other premium manufacturers approach original electronic components and the impact of used parts on a car's behavior, read the article on our blog: Audi and Pure Emotion. How Used Parts Help Maintain the Brand's DNA?.