BMW E90 E92 335i Petrol N54 ECU Kit Control Unit DME 7586933 CAS3 Key Automatic

BMW E90 E92 335i Petrol N54 ECU Kit Control Unit DME CAS3 Key Automatic is a solution designed for demanding users who require a consistent, factory-spec electronic control package. This set from the Electronic control modules and ECUs category facilitates the restoration of proper powertrain operation following an ECU failure or engine replacement. By maintaining component compatibility within a single set, you minimize the risk of communication issues between modules and the immobilizer.

Specifications and technical data

• SKU: 7586933-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7586933
• Substitutable numbers: 12147616431, 7616431, 12147586933, 7586933, 5WK93714, 61359226238, 9226238
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME + CAS3 + key kit

The presented set is dedicated to the BMW 3 Series E90/E92 generation, 335i version with the N54 petrol engine, paired with an automatic transmission. The kit includes the DME engine control unit, the CAS3 module responsible for start authorization, and a matched key, allowing this package to function as a cohesive control and security system.

This solution is particularly useful in situations where the original ECU has been damaged, immobilizer issues have occurred, or it is necessary to replace the entire control assembly following mechanical modifications. Using a complete set reduces the need for deep software intervention and shortens diagnostic time.

Benefits of using a complete DME module with CAS3

The BMW E90 E92 335i Petrol N54 ECU Kit Control Unit DME CAS3 Key Automatic provides a range of practical advantages for daily operation and repairs:

• consistency of the engine control electronics and the vehicle start system,
• maintenance of compatibility with the BMW 3 Series E90/E92 electrical architecture,
• facilitated adaptation in vehicles with the N54 petrol engine and automatic transmission,
• potential cost savings compared to purchasing new modules,
• preservation of the factory logic of the powertrain operation.

For workshops specializing in the BMW brand and for advanced users, such a set is a convenient base for professional repair or ECU replacement, without the need to source individual modules from different origins.

Application in the BMW 335i N54 powertrain with automatic transmission

The N54 engine in the BMW 335i is a petrol unit requiring precise control, especially when combined with an automatic transmission. The Electronic control module DME works with other vehicle controllers, managing engine parameters, throttle response, and communication with the automatic transmission.

The CAS3 module, along with the key, is responsible for start authorization and interaction with the vehicle's security system. Using a matched set minimizes the risk of conflicts between the engine ECU and the immobilizer system, which is particularly important after engine replacement or when repairing electronics following damage.

Product characteristics and condition

The offered set belongs to the Electronic control modules and ECUs group for the BMW brand and is sourced from dismantling, allowing for an economical yet technically sound vehicle repair. The used nature of the component makes it an attractive alternative to new parts, especially for older 3 Series models.

Before installation, standard diagnostic procedures and verification of compatibility with the specific vehicle configuration are recommended, as well as performing any necessary software adaptations in accordance with BMW service practices. This allows the set to become a solid foundation for restoring proper powertrain operation in your 335i.

If you are planning a comprehensive repair or upgrade of your BMW's engine control electronics and need other items from the same group, such as engine ECUs, comfort modules, or transmission control units, check out the available parts in the BMW Electronic control modules and ECUs category.

Technical support and selection of used BMW modules

When working with BMW electronics – especially with DME, CAS, or FRM modules – correct coding, version matching, and informed use of parts from dismantling are crucial. To better understand the principles of safe ECU and module replacement in the 3 and 5 Series, it is worth reading the guide: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models using parts from dismantling?