BMW E81 E87 E90 N43 120i 320i N43 170HP ECU Kit DME CAS3 Key 7583225 Manual

BMW E81 E87 E90 N43 120i 320i N43 170HP ECU Kit DME CAS3 Key Manual is a complete control kit designed for N43 petrol engines with 170 HP in BMW 1 and 3 series models with a manual transmission. The kit includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates the restoration of full electronic system functionality after a failure or engine replacement. This solution allows for consistent matching of the powertrain electronics and immobilizer without the need for time-consuming programming from scratch.

Specifications and technical data

• SKU: 7583225-13
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7583225
• Substitutable numbers: 7583225, 12147583225, 7599881, 12147599881, 7507228, 12147507228, 7580279, 12147580279, 7593667, 12147593667, 7575668, 12147575668, 7579144, 12147579144, 7599882, 12147599882, 7583227, 12147583227, 5WK93643, 61359147195, 9147195, 61359147199, 9147199, 61356943830, 6943830, 12147579142, 7579142, 12147585303, 7585303, 12147575665, 7575665
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility

The kit has been developed for BMW vehicles with the 170 HP N43 petrol engine, particularly the 120i and 320i versions with a manual transmission. The integration of the DME controller with the CAS3 module and the key ensures the consistency of immobilizer data, which is crucial when replacing electronics in modern BMW power units. A set configured in this way is particularly useful for:

• replacing a damaged engine control unit in vehicles with an N43 engine,
• swapping a power unit along with its electronic components,
• resolving issues with start authorization and communication between the DME and CAS3.

Construction of the ECU DME CAS3 Key kit

The BMW E81 E87 E90 N43 120i 320i N43 170HP ECU Kit DME CAS3 Key Manual includes an engine control unit responsible for managing the petrol engine's operation, a CAS3 module acting as the central element of the access and start system, and a matched key. This configuration minimizes the risk of software conflicts between individual modules and facilitates the adaptation process in the vehicle. Combining these elements into one set allows for maintaining the consistency of immobilizer data, which is particularly important in BMW vehicles where the engine controller, CAS module, and key must be logically linked to enable proper starting and communication with the vehicle's other systems.

Benefits of using a complete kit

Using a complete control kit instead of individual modules brings a number of practical service and operational benefits:

• Powertrain electronics consistency – the DME, CAS3, and key are already synchronized, which limits the scope of necessary programming work.
• Easier diagnostics – one logical set simplifies the analysis of potential communication errors between modules.
• Time savings in the workshop – no need to select individual elements and match them to each other.
• Ability to restore full functionality of the starting system in vehicles with a petrol engine and manual transmission. For workshops specializing in the BMW brand, such a kit represents a convenient, technically consistent solution for repairs related to engine electronics and the immobilizer system.

Condition and technical aspects of installation

The elements included in the kit are sourced from dismantling and have the status of a used electronic module, which allows for economical repair while maintaining the original architecture of the BMW control system. Before installation, a standard diagnostic procedure and verification of the vehicle configuration's compatibility with the used petrol engine and manual transmission are recommended. In practice, installing such a set requires:

• correct connection of the DME controller to the vehicle's wiring,
• installation of the CAS3 module in the factory location,
• adaptation of the kit to the specific vehicle according to BMW service procedures.

Substantive support and selection by OEM/VIN

When selecting used control modules, hardware and software compatibility with the specific vehicle configuration is particularly important. To better understand the principles of matching controllers, CAS modules, and sensors, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. The article discusses, among other things, selection by VIN and OEM numbers, HW/SW compatibility issues, and practical installation examples. If you are planning a comprehensive repair or upgrade of the engine electronics area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or transmission controllers, check the available parts in the BMW electronic control modules and controllers category.