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 an original electronic control unit designed for N52 petrol engines paired with an automatic transmission. This component from the Electronic control modules and ECUs category is responsible for precise engine management, ensuring stable power characteristics and proper integration with other vehicle systems.

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 BMW N52 engine control unit

The engine computer in BMW 3 Series E90 330i and 5 Series E60 530i models with the N52 unit is the central module responsible for controlling the combustion process, fuel injection, and ignition timing. When paired with an automatic transmission, it coordinates powertrain operating parameters to maintain smooth acceleration, predictable throttle response, and proper petrol engine performance.

Thanks to its factory architecture, the controller communicates with other vehicle modules via the data bus, which enables consistent operation of systems such as electronic stability control, safety systems, and advanced comfort features. A properly selected engine computer is crucial for maintaining the original performance parameters of the N52 unit.

Benefits of using an original BMW module

Choosing an original controller from a dismantled vehicle allows you to maintain compatibility with the factory electrical installation and vehicle software. The module's design is prepared to work with a specific configuration of the petrol engine and automatic transmission, which reduces the risk of communication issues between controllers and diagnostic errors.

The main advantages of using this engine computer include:

• maintaining the factory control logic for the N52 unit,
• consistent cooperation with the automatic transmission,
• compatibility with the original wiring harness and sensors,
• possibility of proper diagnostics using factory service tools.

This solution is particularly beneficial for repairs following engine electronics failure, when the goal is to restore the original powertrain characteristics without experimenting with aftermarket alternatives not intended by the manufacturer.

Application in BMW 3 and 5 Series vehicles

The presented engine computer is intended for BMW cars equipped with the N52 petrol engine paired with an automatic transmission. This configuration is typical for the 330i E90 and 530i E60 versions, where the controller is responsible not only for basic engine functions but also for integration with comfort and safety systems characteristic of these models.

When selecting a module, it is worth paying attention to compatibility with the specific vehicle equipment version and the engine accessories used. A properly matched controller facilitates the adaptation and programming process in the vehicle, reducing the time required to restore full powertrain efficiency after replacing a damaged module.

Condition, origin, and installation aspects

The offered engine computer comes from a dismantled vehicle and is a used part, which in practice means a favorable cost-to-functionality ratio while maintaining the original manufacturer's specifications. The module is designed for installation in place of the factory controller, using the existing wiring harness and factory mounting points.

In most cases, installation requires programming and adaptation procedures to be performed on the vehicle to match the controller to a specific BMW unit. For this reason, it is recommended that installation and configuration be carried out by a workshop with experience in BMW electronics and appropriate diagnostic tools. This approach minimizes the risk of communication errors between modules and ensures stable powertrain operation.

Technical support and additional information

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

To better plan your car's electronics repair, it is worth reading practical tips on diagnostics and selecting used modules. A detailed discussion of the topic 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?, which describes, among other things, issues related to BMW engine controllers and their proper replacement.