BMW E60 E90 330i 530i N52 258HP ECU Kit DME 7553166 + CAS2 + Key Automatic

BMW E60 E90 330i 530i N52 258HP ECU Kit DME + CAS2 + Key Automatic is a factory electronic control unit designed for N52 petrol engines paired with an automatic transmission. This component from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable performance and proper interaction with other vehicle systems. Thanks to its original OEM design, the controller is perfectly matched to the electrical architecture of BMW 3 Series and 5 Series models.

Specifications and technical data

• SKU: 7553166-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7553166
• Substitutable numbers: 7553166, 12147553166, 5WK90077, 6964051, 61356964051
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The engine computer in BMW models with the N52 unit is responsible for key processes such as fuel metering, ignition control, and coordination of engine peripherals. In petrol versions with an automatic transmission, the controller works with the transmission module, electronic stability control, and safety systems, which translates into smooth acceleration and predictable throttle response. A properly selected ECU allows for maintaining the factory performance parameters of the powertrain, reducing the risk of diagnostic errors, and facilitating integration with the vehicle's existing electrical installation. This is particularly important when replacing a faulty module in modern BMW designs.

Benefits of using an original BMW module

Using an original engine computer dedicated to the BMW E60 and E90 with the N52 engine ensures:

• consistency with the vehicle's factory electronic architecture,
• proper cooperation with the automatic transmission,
• preservation of stock engine control maps,
• easier diagnostics using factory service tools. For the user, this means stable engine operation, predictable vehicle behavior, and a reduction in compatibility issues that often arise when using unsuitable replacements. In the case of this type of automotive electronics, it is particularly important to match the unit to the specific engine and transmission configuration, which this controller fulfills.

Product characteristics and practical application

The presented engine computer is a used component, which in practice allows for an economical repair of the control system while maintaining the manufacturer's original specifications. The module comes from the BMW product line and is intended for use in petrol-powered vehicles equipped with an automatic transmission, which is significant when selecting the correct ECU for a specific body and drivetrain version. Replacing the controller is particularly considered in situations where persistent electronic errors occur, there are problems with starting the engine, or there is improper interaction with other vehicle modules. A properly selected module from this group allows for restoring the correct operation of the powertrain without the need for mechanical engine intervention.

Used electronics – what to look for

When choosing a used engine controller, it is worth paying attention to compatibility with the fuel type, transmission type, and vehicle platform. For BMW 3 Series and 5 Series models with the N52 unit, proper module matching has a direct impact on the correctness of communication with other controllers in the vehicle. Additionally, installation often requires appropriate coding or adaptation to the specific car, which is best left to a specialized service center. If you would like to learn more about the selection of used ECU modules, their testing, and safe installation principles, check out the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, where you will find practical tips and examples of applications.

Expanding the control system in a BMW

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional controllers, management modules, or controllers working with the ECU, check out the available parts in the BMW electronic control modules and controllers category. A well-selected set of electronic modules allows for maintaining the consistency of the entire powertrain management system, which translates into vehicle stability, predictable reactions of driver assistance systems, and easier diagnostics in the future. Choosing components from one compatible product group is particularly important in modern designs, where most vehicle functions are closely integrated.