BMW 3 5 Series E60 E61 E90 E91 N52 325i 525i ECU Kit DME CAS2 Key 7555361 Manual

BMW E60 E90 N52 325i 525i CAS Module 7555361 is an original module from the Electronic Control Units and Controllers group, designed to work with the N52 unit in 3 and 5 Series models. This component is responsible for advanced vehicle access and start system management, ensuring consistent operation of onboard electronics in BMW cars with manual transmissions.

Specifications and technical data

• SKU: 7555361-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7555361
• Substitutable numbers: 12147577970, 7577970, 12147555361, 7555361, 61356943771, 6943771, 5WK90078
• Gearbox type: Manual
• Category: ECUs & Computer Modules

CAS Module Purpose and Function

The CAS module in BMW E60 and E90 models with the N52 engine plays a crucial role in engine start logic, key authorization, and management of selected comfort functions. For the 325i and 525i versions, this module collaborates with the vehicle's electrical system and other controllers, creating a cohesive security and control system.

By using an original used controller, compatibility with BMW's electrical architecture is maintained, facilitating integration with the existing wiring harness, ignition switch, and other body modules.

Compatibility with BMW 3 and 5 Series

The presented CAS module is intended for BMW 3 Series E90 and 5 Series E60 cars equipped with the N52 engine in the 325i and 525i versions. The module's design is adapted to the specifics of these models, including configurations with a manual transmission, which is important for correct cooperation with the start and security systems.

In practice, this means the controller can be used as a service part for CAS system repairs, replacing a damaged module, or restoring electronic functionality after a failure. The presence of interchangeable part numbers in the technical specifications allows for further verification of compatibility with a specific vehicle configuration.

Technical Characteristics and Vehicle Integration

As an original BMW part, the CAS module is designed to operate in the demanding automotive environment, considering resistance to voltage fluctuations, electromagnetic interference, and typical operational loads. The controller communicates with the vehicle's network, transmitting and receiving data from other modules responsible for, among other things, the engine, body, and comfort systems.

Proper integration with the vehicle's electrical system and software requires the use of appropriate service procedures, including module matching and coding to the specific car. This allows for the restoration of full functionality of the start and security systems without altering the factory operating logic.

Condition, Origin, and Service Application

The offered CAS module is a used part, sourced from disassembly, which allows for economical repair of BMW electronics while maintaining original quality. This type of part is particularly useful in situations where the controller has been damaged due to overvoltage, water ingress, or installation errors.

In workshops specializing in the BMW brand, modules of this type are used for both standard repairs and more advanced diagnostic work related to starting problems, key communication issues, or malfunctioning comfort systems.

Technical Support and Service Knowledge

When planning electronics repairs for BMW 3 and 5 Series vehicles, it is advisable to consult reliable sources of information. In our guide, you can read about how to long-term care for BMW 3 and 5 Series electronic modules and how to safely use parts from disassembly, including engine controllers, FRM modules, and the iDrive system. The article helps understand how to correctly select and install used components to maintain the stable operation of the entire system.

If you are looking for other electronic components for your car, also check out our offer in the section tested BMW modules and controllers from disassembly – a practical guide to selecting parts, where we discuss typical repair scenarios and highlight what to look for when choosing used components.