Mini Cooper R55 R56 R60 CAS 3 ECU Control Unit Key Reading Module 9221719

Visual condition of the part

The product shows signs of use visible in the photos.

Mini Cooper R55 R56 R60 CAS 3 ECU Control Unit Key Reading Module is an original component from the Electronic control modules and ECUs group, designed for advanced management of comfort functions and access authorization in BMW Mini vehicles. This used CAS 3 module allows for a technically correct repair of the electronic system, maintaining the factory installation architecture and high operational reliability.

Specifications and technical data

• SKU: 9221719-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9221719
• Substitutable numbers: 61359221719, 9221719, KZ
• Category: ECUs & Computer Modules

Purpose and function of the CAS 3 module

The CAS 3 comfort control unit in Mini R55, R56, and R60 models is responsible for handling key functions related to vehicle access and engine starting. The module works with the car's electrical system, integrating signals from the key, ignition switch, or start/stop system and other comfort components, ensuring consistent and predictable operation of the entire system.

By maintaining the original electronics architecture, the use of this control unit allows for compliance with factory security and comfort systems without the need for interfering with wiring harnesses or making additional modifications.

Benefits of using an original BMW module

Choosing an original BMW Mini comfort module from the CAS 3 family is a solution that technically aligns with the vehicle manufacturer's specifications. The most important advantages include:

• Factory electrical fitment – the module works with the original installation without the need for wiring modifications.
• Consistency with security systems – maintaining proper communication with security and authorization systems.
• Stable operation of comfort systems – predictable performance of functions related to vehicle access and starting.

This approach reduces the risk of communication errors in the vehicle network and facilitates subsequent diagnostics using factory service tools.

Condition, selection, and installation of the control unit

The offered CAS 3 module is a used component, which in practice means a beneficial combination of price and original BMW manufacturing quality. In the case of automotive electronics, using parts from dismantling is often an effective solution, especially when compliance with factory specifications and cost reduction are priorities.

Before installation, it is recommended to:

• verify the module's compatibility with the specific vehicle equipment version,
• plan any necessary programming or adaptation procedures for the vehicle,
• perform diagnostics after installation to confirm proper communication within the electronic network.

This approach allows for seamless integration of the control unit with the existing installation and minimizes the risk of improper comfort system operation.

BMW electronic control modules and ECUs – expansion and service

If you are planning a comprehensive repair or upgrade of the body electronics in your BMW and need other components from the same group, such as comfort modules, body control units, or lock control units, check out the available parts in the BMW electronic control modules and ECUs category.

How to consciously choose used automotive electronics

When selecting a used comfort module, it is worth paying attention to compatibility with the vehicle platform, installation type, and coding requirements. Specialized guides on automotive electronics can be helpful – you will find practical tips in the article Second life for electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?, which discusses key aspects of purchasing and installing such components.

Additional support in making a decision can be found in the analysis of differences between new and used parts – the article Car parts – new or used? We compare costs, quality, and durability discusses issues of cost, durability, and availability, which allows for better alignment of the service strategy with the specific vehicle and budget.

Summary

Mini Cooper R55 R56 R60 CAS 3 ECU Control Unit Key Reading Module is an original BMW electronics component, designed for professional repair of comfort and authorization systems in Mini vehicles. The used control unit allows for maintaining the factory logic of system operation, reducing service costs, and maintaining consistency with other modules in the vehicle, which is particularly important in modern electronic installations.