BMW 3 Series E90 E91 LCI 325i N53 218HP ECU Kit DME CAS3 + Key 7583332 Manual

BMW 3 Series E90 E91 LCI 325i N53 218HP ECU Kit DME CAS3 + Key is a complete electronic set designed for facelifted BMW 3 Series models with the 218 HP N53 engine and a manual transmission. The set includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates restoring proper powertrain operation after an electronics failure. This is a practical solution for workshops and users looking for a proven, used ECU set for a specific vehicle configuration.

Specifications and technical data

• SKU: 7583332-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7583332
• Substitutable numbers: 12147616431 5WK93642 61359147196, 7616431 5WK93642 9147196, 12147583332, 7583332
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented ECU set is intended for facelifted (LCI) BMW 3 Series E90 and E91 vehicles with the 218 HP N53 engine and a manual transmission. The combination of the DME controller, CAS3 module, and key ensures consistent operation of the starting system, security features, and engine management in this specific powertrain configuration.

By maintaining component compatibility within a single set, this kit is particularly useful when replacing a faulty engine control unit or addressing immobilizer issues, where it is necessary to match the electronics to the specific model and transmission type.

Functionality of the DME CAS3 + Key set

The set includes key components responsible for engine management and starting authorization:

• control of N53 engine operating parameters (injection, ignition, protection strategies),
• cooperation with the vehicle's security system via the CAS3 module,
• handling of the engine start procedure using the matched key,
• integration with the vehicle's electrical system within the factory BMW architecture.

A set configured in this way helps reduce the risk of communication issues between the engine control unit and the comfort module or immobilizer system, which in practice shortens diagnostic time and speeds up the repair process.

Application in vehicles with a manual transmission

The offered ECU kit is designed for cars equipped with a manual transmission, which is significant for torque management logic, cooperation with driver assistance systems, and DME software configuration. Selecting a set compatible with the transmission type is crucial to avoid communication errors and improper operation of onboard systems.

For workshops specializing in the BMW brand, such a set provides a convenient base for further configuration and adaptation, especially when replacing damaged electronics in vehicles with the N53 engine.

Benefits of choosing a used ECU set

A used DME CAS3 + key ECU set is a solution that allows for significant repair cost savings compared to purchasing new components, while maintaining the original BMW architecture. The complete nature of the set simplifies the installation and programming process, and replacing the controller, CAS3 module, and key simultaneously minimizes the risk of incompatibility between individual elements.

If you want to better understand when choosing used electronics is justified and how to safely select an engine control unit or comfort module, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

BMW electronic control modules and controllers – expansion and service

If you are planning a comprehensive repair or upgrade of the electronic control area in your BMW and need other components from the same group, such as additional controllers, body modules, or engine management systems, check out the available parts in the BMW electronic control modules and controllers category.

For workshops that want to reduce vehicle downtime, the following practical material on repair logistics and parts availability may also be helpful: how the immediate availability of used OEM parts affects repair time in the workshop.