BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU KIT DME CAS 2 key 7557290 Manual

BMW 1 3 Series E87 E90 E91 120i 320i N46 ECU KIT DME CAS 2 key Manual is a set from the Electronic control modules and controllers category, designed for BMW 1 and 3 Series models with the N46 engine and manual transmission. The kit includes engine and immobilizer control units, allowing for a consistent, technically correct replacement of key powertrain electronics components.

Specifications and technical data

• SKU: 7557290
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557290
• Substitutable numbers: 12147557290, 7557290, 61356981416, 6981416
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application of the ECU KIT DME CAS 2

The presented kit is intended for BMW 1 Series E87 and 3 Series E90/E91 vehicles with the N46 unit and manual transmission. Combining the engine control unit with the CAS 2 module and a matched key allows for the restoration of proper operation of the starting system, security features, and vehicle network communication without the need for time-consuming individual component matching.

For workshops specializing in the BMW brand, such a set is a convenient solution in the event of an engine controller failure, immobilizer issues, or the inability to code a new key into an existing set.

Construction and function of the kit components

The set includes an engine control unit (DME) compatible with the N46 unit, a CAS 2 module responsible for start authorization, and a key matched to this set. This configuration ensures data consistency between the engine controller and the security system, which facilitates installation and reduces the risk of software conflicts.

This makes it possible to maintain proper communication with the vehicle's electrical system, including comfort and safety systems, while maintaining correct engine operating parameters. This solution is particularly useful when replacing a damaged controller or CAS module in vehicles under intensive use.

Benefits of using a complete controller kit

Using a complete ECU KIT DME CAS 2 with a key reduces the need for deep interference with the vehicle's software. In many cases, this allows for shorter repair times, simplifies the adaptation process, and reduces the risk of errors related to data mismatch between individual modules.

For the end user, this means more reliable vehicle starting, stable powertrain operation, and the preservation of factory-intended security functions. For the service center, it provides a convenient base for further configuration if additional settings are required for a specific car specification.

Condition, origin, and service purpose

The offered set comes from dismantling and is intended for service applications in BMW vehicles where the engine control electronics or the immobilizer system have been damaged. The used nature of the kit allows for an economical repair while maintaining the original electronic architecture of the vehicle.

Before installation, it is recommended to verify compatibility with the specific car configuration and perform standard diagnostic procedures to ensure that all related systems communicate correctly after installation.

Expanding knowledge and selecting BMW electronics

If you want to better understand the operating principles of BMW engine controllers, comfort modules, and the iDrive system in the 3 and 5 Series, as well as learn best practices for using parts from dismantling, check out the article: 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 elements from the same group, such as engine controllers, comfort modules, or security systems, check the available parts in the BMW Electronic control modules and controllers category.