BMW E60 E90 E91 N52 330i 530i ECU Kit DME CAS2 Key 7553166 Automatic

BMW E60 E90 E91 N52 330i 530i ECU Kit DME CAS2 Key is an original electronic control unit designed for N52 engines in 3 and 5 series models equipped with an automatic transmission. This specialized controller from the Electronic control modules and ECUs category ensures precise engine management, supporting stable operation and proper communication with other vehicle systems. It is a solution for users who expect consistency with BMW's factory electronics architecture.

Specifications and technical data

• SKU: 7553166-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7553166
• Substitutable numbers: 12147577970 12147553166 5WK90077 61356964051, 7577970 7553166 6964051
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the BMW N52 engine controller

The presented engine computer is designed to work with the N52 petrol engine in BMW E60, E90, and E91 series models in 330i and 530i versions. As a central element of the powertrain management system, it is responsible for:

• real-time monitoring of engine operating parameters,
• coordination of fuel injection and ignition,
• cooperation with the automatic transmission,
• communication with other modules in the vehicle network.

Thanks to this, the controller maintains the consistency of the N52 unit's characteristics with BMW's factory specifications, which is particularly important during repairs and restoring factory settings.

Compatibility and integration with the powertrain

The engine computer is dedicated to vehicles equipped with an automatic transmission, meaning its software and configuration are adapted to work with the mechatronics and gear-shifting logic of these transmissions. In practice, this translates into:

• proper torque synchronization with transmission operation,
• stable gear shifting under various loads,
• preservation of factory powertrain protection strategies.

As an item from the Electronic control modules and ECUs group, the controller is prepared to work within the existing BMW electrical architecture, which facilitates its integration after proper matching and configuration in the vehicle.

Product characteristics and service application

The offered module is a genuine BMW part, which ensures structural compatibility with factory wiring harnesses, connectors, and placement in the engine bay. In service applications, it will prove particularly useful in situations where:

• it is necessary to replace a damaged controller in an N52 unit,
• the factory electronics configuration is being restored after modifications,
• diagnostics indicate problems with communication or engine control.

For workshops specializing in BMW and users who care about maintaining the car's original characteristics, using such a module allows for maintaining consistency with the manufacturer's factory solutions.

Condition, verification, and installation aspects

The product is offered as a used item, which in practice means the possibility of an economical repair while maintaining the manufacturer's original specifications. Before installation, it is recommended to:

• check compatibility with the specific N52 engine version and vehicle model year,
• plan programming, coding, or adaptation procedures in the vehicle,
• perform diagnostics after installation to confirm correct communication within the vehicle network.

Professional installation and configuration are crucial for the proper operation of the controller, which is why it is recommended to commission the work to a workshop with experience in BMW electronics.

Repair project expansion and technical knowledge

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, comfort modules, or powertrain management systems, check out the available parts in the BMW electronic control modules and ECUs category.

For a better understanding of how original electronic modules affect the character of a premium car and how used components can restore factory properties, it is worth reading the blog article: Audi and pure emotion – how original modules and controllers help maintain the brand's DNA. Although the description concerns a different brand, the issues discussed also apply to the approach to electronics in BMW.

If you are interested in a broader context of using used electronic components in cars from model years similar to the E60 and E90, the following material may also be helpful: The second life of a youngtimer – how used car parts support the restoration of BMW models from 1998–2012.