BMW E60 E90 E91 LCI 330i 530i N53 272HP ECU Kit DME 7616431 CAS3 + Key Automatic

BMW E60 E90 E91 LCI 330i 530i N53 272HP ECU Kit DME CAS3 + Key Automatic is a complete, used set of electronic components designed for BMW vehicles with an automatic transmission. This type of solution is particularly useful for professional repairs or replacing a faulty comfort module/immobilizer in 3 and 5 series models, ensuring the consistency of the electronics and the key in one matched package.

Specifications and technical data

• SKU: 7616431-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7616431
• Substitutable numbers: 12147616431, 7616431, 5WK93754, 61359147220, 9147220
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the CAS3 kit

The presented kit belongs to the Electronic control modules and ECUs category and is used in BMW vehicles from the E60, E90, and E91 families equipped with an automatic transmission. The CAS3 kit is responsible for handling functions related to key authorization, engine starting, and communication with other comfort and safety modules in the vehicle.

Combining the ECU with a matched key helps reduce issues with coding and synchronization, which in practice shortens repair time and facilitates workshop operations. For the end user, this means restoring full functionality to the vehicle's starting system and ensuring stable cooperation with other electronic systems.

Benefits of using a complete ECU with key

Using a complete CAS3 kit in a BMW E60, E90, and E91 brings a number of practical advantages, especially in terms of service and costs:

• reduction of the risk of incompatibility between the ECU and the key,
• reduced scope of programming compared to replacing individual components,
• possibility of effective vehicle repair after electronic failure or unsuccessful coding attempts,
• an attractive cost alternative compared to brand-new components.

For workshops specializing in the BMW brand, such a kit is a convenient solution that allows for faster diagnosis and removal of faults related to the immobilizer, start/stop system, and communication with other modules in the vehicle.

Integration with automatic transmission

The offered CAS3 ECU is designed for vehicles with an automatic transmission, which is important when selecting the correct module for a specific car configuration. In BMW 3 and 5 series vehicles, the electronics responsible for starting and authorization work with the transmission control system, which is why matching the transmission type is crucial for the proper operation of the entire system.

A properly selected CAS3 kit with a key helps avoid problems with the starter lock, communication errors between modules, and incorrect gear selector position recognition. This is especially important in vehicles used intensively, where the stability of the electronics translates into driving comfort and safety.

Professional application and compatibility with replacement numbers

The product is intended for service centers, automotive electricians, and informed users who are looking for a solution based on original BMW components. The ECU has a dedicated OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific vehicle configuration and production year. This allows for precise matching of the module to the existing installation, minimizing the risk of incompatibility.

If you have any doubts regarding the selection of the component, it is worth comparing the markings with the module currently installed in the vehicle or consulting a specialized BMW service center, which will verify compatibility based on the VIN number and equipment configuration.

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, body control units, or engine management systems, check the available parts in the BMW electronic control modules and ECUs category.

Technical support and additional information

To better understand the relationships between electronic modules in BMW 3 and 5 series and to learn practical tips on using salvaged parts, it is worth reading the article: Joy of driving for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models. You will find information there that is helpful in planning repairs, diagnostics, and safely selecting used ECUs.

For users and workshops servicing the BMW E90, a practical guide to engines and typical operational problems may also be useful: Troublesome BMW E90 engines: check what can ruin your budget. It allows you to better assess the condition of the vehicle, plan service work, and consciously approach investments in electronics and other components.