BMW E90 E91 E92 335i Petrol N54 ECU Kit Control Unit DME 7568842 CAS3 Key Manual

The BMW E90 E91 E92 335i Petrol N54 ECU Kit Control Unit DME CAS3 Key Manual is a complete engine control kit designed for petrol versions of the BMW 3 Series with an N54 engine and a manual transmission. The kit includes the DME engine control unit, the CAS3 module, and a matched key, making it easier to restore the electronic system's functionality after a failure or during an engine replacement. This is a practical solution for workshops and users looking for a cohesive, factory-standard control package.

Specifications and technical data

• SKU: 7568842-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7568842
• Substitutable numbers: 12147616431, 7616431, 12147568842, 7568842, 5WK93608, 61359226238, 9226238
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

ECU Kit Application and Purpose

The ECU kit has been developed for BMW 3 Series models of the E90, E91, and E92 generation, specifically the 335i version with the N54 petrol engine and a manual transmission. The combination of the DME control unit, CAS3 module, and key allows for seamless management of the engine's operation, immobilizer, and start authorization. This kit is particularly useful for:

• Replacing a damaged engine control unit in 335i N54 vehicles,
• Engine swaps within the same generation of the 3 Series,
• Resolving communication issues between the DME, CAS3, and key.

Construction and Function of Individual Components

The central element of the kit is the DME control unit, responsible for precise control of the N54 petrol engine's operation. This module manages, among other things, fuel delivery, ignition, and interaction with other vehicle systems, ensuring stable and predictable engine performance characteristics.

The CAS3 module acts as an advanced authorization system that communicates with both the engine control unit and the key. It is responsible for key recognition, immobilizer operation, and transmitting the start signal. The included key is factory-paired with the CAS3 module, significantly simplifying the installation process and reducing the need for additional programming.

Benefits of Using a Complete DME + CAS3 + Key Kit

Using a complete engine control kit for the BMW 335i N54 with a manual transmission offers a range of practical service and user benefits:

• Component Cohesion – The DME control unit, CAS3 module, and key come from a single system, minimizing the risk of software conflicts.
• Simplified Installation – A ready-made kit reduces the scope of coding and adaptations compared to replacing individual modules.
• Time Savings in the Workshop – Faster diagnostics and vehicle startup after electronic system repairs.
• Factory Integration with Petrol Powertrain – The kit is prepared to work with the N54 engine and manual transmission, facilitating the preservation of original operating parameters.

Characteristics of a Used Product

The offered kit is a used part, meaning it has been removed from a vehicle but retains the functionality required for continued operation. This type of solution is often chosen by BMW-specialized workshops as it allows for economical repairs while preserving the vehicle's original electronic architecture. A used ECU kit is also a good choice when matching a specific petrol powertrain and manual transmission configuration is important.

Integration with BMW Electronics and Service Knowledge

When working with BMW control modules such as DME or CAS3, a correct approach to diagnostics, programming, and adaptation is crucial. It is advisable to leverage experience and proven procedures to avoid issues with vehicle bus communication or the immobilizer. If you want to better understand how to safely use salvaged parts in the electronic systems of BMW 3 and 5 Series, consult the guide How to Care for BMW iDrive Systems and Electronic Modules Using Salvaged Parts, where you will find practical tips for working with control modules, including engine control units.

Summary

The BMW E90 E91 E92 335i Petrol N54 ECU Kit Control Unit DME CAS3 Key Manual is a functional, complete engine control kit for petrol 335i versions with a manual transmission. The combination of the DME control unit, CAS3 module, and matched key allows for efficient restoration of the powertrain system's operation after electronic failure or during an engine swap. This solution is particularly useful for workshops and users who expect factory compatibility and want to minimize the time required for electronic configuration in their BMW 3 Series.