BMW E60 520i M54 170HP Engine Control Unit ECU Kit DME 7549387 + CAS2 Key Manual

BMW E60 520i M54 170HP Engine Control Unit ECU Kit DME + CAS2 Key Manual is a complete engine control set designed for the 170 HP M54 unit in the BMW 5 Series E60 with a manual transmission. The kit includes the engine control unit (ECU) along with the CAS2 module and a matched key, which facilitates adaptation in the vehicle and allows for efficient repair of the electronic system. It is a practical solution for workshops and users looking for proven, used OEM electronics.

Specifications and technical data

• SKU: 7549387-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7549387
• Substitutable numbers: 12147549387 5WK93024 12147549390 61356943851, 7549387, 5WK93024, 7549390, 6943851
• Gearbox type: Manual
• Category: Control Modules

Purpose and function of the ECU DME + CAS2 kit

The engine control kit for the BMW E60 520i with the M54 unit is responsible for precise management of the gasoline engine's operation, including fuel injection, ignition, and interaction with other vehicle systems. Combining the DME controller with the CAS2 module and key ensures consistency of the immobilizer and electronics, which significantly simplifies installation in a vehicle equipped with a manual transmission.

A set configured in this way is particularly useful when replacing a damaged controller or when it is necessary to match electronics after mechanical engine repairs. Component compatibility within a single kit reduces the risk of vehicle starting issues and communication problems between modules.

Benefits of using an original engine control unit kit

Choosing an original ECU DME kit with CAS2 and key for the BMW E60 520i M54 allows you to maintain factory engine control logic and compatibility with the vehicle's electrical system. In practice, this means:

• maintaining engine operating parameters consistent with the manufacturer's factory settings,
• proper cooperation with safety and comfort systems,
• reduced risk of communication errors in the CAN network,
• easier diagnostics using standard BMW service tools.

For workshops specializing in the BMW brand, such a set is a convenient, technically consistent solution that speeds up the repair process and limits the time required for programming and immobilizer matching.

Characteristics of the used ECU kit for BMW

The offered item belongs to the Computers and Controllers category and is a used part, sourced from dismantling. This type of OEM electronics, when properly verified and selected, represents a reasonable compromise between repair costs and maintaining factory build quality. The ECU DME + CAS2 + key kit is particularly valued where compatibility with the original installation and the ability to quickly restore full vehicle functionality are important.

Before installation, a standard diagnostic procedure and installation by a workshop experienced with BMW electronics are recommended, which will allow you to fully utilize the kit's potential and avoid configuration problems.

Application in service and tuning practice

The complete engine control kit with the CAS2 module and key works well both in typical maintenance repairs and in more advanced projects, such as engine unit replacement within the same model generation. Consistency of engine electronics and the immobilizer facilitates the adaptation of the kit in the vehicle, minimizing the need for deep programming interventions.

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 controllers, ignition modules, or injection control units, check out the available parts in the BMW Computers and Controllers category.

More about choosing used automotive electronics

When selecting a used engine controller, it is worth knowing the basic principles of assessing compatibility and the risks associated with installing aftermarket electronics. If you want to deepen your knowledge about when used ECUs, comfort modules, or parking sensors are a reasonable choice, check out the article Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, where you will find practical tips and service advice.