BMW 5 Series E60 520i Engine M54 170HP ECU Kit DME 7548769 CAS2 + Key Automatic

BMW 5 Series E60 520i Engine M54 170HP ECU Kit DME CAS2 + Key Automatic is a factory electronic engine control unit designed for the M54 engine in the 520i model with an automatic transmission. As a component from the Electronic control modules and controllers group, it is responsible for the precise management of engine operation, fuel injection, and ignition. This used DME controller is a sensible solution for professional powertrain repairs, allowing you to maintain the original performance characteristics of the BMW unit.

Specifications and technical data

• SKU: 7548769-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7548769
• Substitutable numbers: 12147548769, 7548769, 12147549361, 7549361, 12147549390, 7549390, 61356960978, 6960978, 5WK93022
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Function and application of the DME controller in the BMW E60 520i M54

The presented engine computer is the central element of the M54 engine control system in the BMW 5 Series E60 in the 520i version with an automatic transmission. It is responsible for:

• coordinating fuel injection and ignition under various load conditions,
• managing engine peripherals, including components responsible for exhaust emissions,
• communicating with other vehicle modules via the data bus,
• adjusting engine operating parameters to driving style and road conditions.

By maintaining factory control logic, using an original DME helps maintain stable engine refinement, proper dynamics, and predictable throttle response.

Benefits of using an original control module

Choosing an original engine computer for the BMW E60 520i M54 provides a number of practical advantages in daily operation and during service:

• Full integration with the vehicle's electrical system – the controller is designed to work with the factory wiring harness, sensors, and comfort and safety modules.
• Consistency with BMW service software – facilitates diagnostics, adaptations, and potential software updates.
• Proper matching with the automatic transmission – correct data exchange between the DME and the transmission control unit affects the smoothness of gear shifts.
• Ability to maintain factory fuel consumption and performance parameters – important for fuel economy and compliance with emission standards.

Characteristics of the used engine controller

The offered DME engine computer is a used component, which in practice means a favorable compromise between repair costs and maintaining original BMW quality. Such controllers are frequently chosen for:

• engine electronics failures manifesting as starting problems or unstable operation,
• the need to replace a damaged module after flooding or a power surge,
• professional powertrain repairs where compliance with factory specifications is essential.

Before installation, it is recommended to perform full vehicle diagnostics and plan the appropriate procedures for programming and matching the controller to the specific vehicle (coding, synchronization with the immobilizer, adaptations).

BMW electronic control modules and controllers – expansion and service of the powertrain

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 engine control modules, transmission controllers, or auxiliary system controllers, check out the available parts in the BMW electronic control modules and controllers category.

To better plan the purchase of a used engine controller and understand what to look for when selecting an ECU for a specific car configuration, it is worth reading the guide: Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?