BMW E90 E91 E92 N52N 325i 218HP ECU Kit DME 7574544 CAS3 Key Automatic

BMW E90 E91 E92 N52N 325i 218HP ECU Kit DME CAS3 Key Automatic is a complete control unit kit designed for 3 Series models with the N52N 218 HP engine, equipped with an automatic transmission. The kit includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates the restoration of proper powertrain electronics operation after a failure or engine replacement. This solution allows for a consistent configuration of the start system, immobilizer, and engine management in BMW 3 Series E90, E91, and E92 vehicles.

Specifications and technical data

• SKU: 7574544-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7574544
• Substitutable numbers: 12147581123, 7581123, 12147574544, 7574544, 12148613000, 8613000, 5WK90210, 61356943830, 6943830
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME CAS3 kit

The presented kit belongs to the Electronic control modules and ECUs category, designed to work with the N52N 325i 218 HP petrol engine. Combining the DME controller with the CAS3 module and key ensures consistent management of starting, vehicle security, and engine operating parameters. This makes it possible to restore the original engine control logic and communication with other modules in the vehicle.

The kit is dedicated to BMW 3 Series E90, E91, and E92 generation vehicles equipped with an automatic transmission, which is crucial for proper interaction with the transmission module as well as comfort and safety systems.

Benefits of using a complete DME + CAS3 + key kit

Using a complete control kit instead of individual modules reduces the risk of problems with immobilizer matching, key synchronization, and vehicle bus communication. In practice, this means:

• consistent operation of the DME engine controller and the CAS3 module as part of a single kit,
• maintaining compatibility with the N52N 325i 218 HP engine configuration,
• simplified adaptation procedure in a vehicle with an automatic transmission,
• reduced time required for diagnostics and programming.

For workshops specializing in the BMW brand, such a kit is a practical solution when replacing a damaged controller, repairing after water damage, or addressing communication issues in the vehicle network. The completeness of the kit promotes stable powertrain operation after installation and configuration.

Application in BMW 3 Series with automatic transmission

The discussed ECU kit is intended for BMW 3 Series E90, E91, and E92 vehicles equipped with the N52N 325i 218 HP engine and an automatic transmission. In such configurations, the engine controller works with the transmission module, traction control system, and comfort systems, which is why selecting the correct kit has a direct impact on the proper functioning of driving features, gear shifting, and driver assistance systems.

In the event of replacing a damaged controller or CAS3 module, using a complete kit with a key allows for a reduction in the number of programming operations and speeds up the process of restoring vehicle functionality. This is particularly important in vehicles used intensively, where a quick return to full functionality is essential.

Condition, origin, and installation aspects

The product comes from dismantling and is offered as a used BMW control kit. This type of solution is often chosen as an economical alternative to new modules while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a full vehicle diagnostic and plan adaptation procedures according to the equipment of the specific unit.

Due to the nature of the electronic component, installation should be carried out by a workshop with experience in working with BMW electronics and access to appropriate diagnostic software. This allows for the correct configuration of the kit in the vehicle and ensures the stable operation of all related systems.

Technical support and further reading

For users and workshops that want to better understand issues related to control modules in BMW 3 and 5 Series, an article describing the practical aspects of electronics repair and the use of parts from dismantling will be useful. More information can be found in the material: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models.

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other components from the same group, such as engine controllers, comfort modules, or security systems, check the available parts in the BMW electronic control modules and ECUs category.