Mini R57 LCI Automatic Air Conditioning A/C Heater Control Unit Module 3457397

Mini R57 LCI Automatic Air Conditioning A/C Heater Control Unit Module is an original module designed for precise temperature and airflow management in the cabin. As a component from the Climate control units group, it works with the factory A/C system, ensuring consistent operation with the vehicle's other electronics. This is a practical solution for users who want to restore full air conditioning functionality after a factory controller failure.

Specifications and technical data

• SKU: 3457397-23
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 3457397
• Substitutable numbers: 3456898, 64113457397, 3457397, 64113456918, 3456918, 64113456809, 3456809, 64113456392, 3456392, 64113456232, 3456232
• Location on the vehicle: Front
• Gearbox type: Automatic
• Category: HVAC Controls & Control Units

Module purpose and function

The presented climate control unit is dedicated to the Mini R57 post-facelift (LCI) versions equipped with an automatic transmission. It is responsible for handling automatic temperature regulation, air distribution, fan speed, and integration with the heating system. It is mounted in the front of the cabin, in the center console, within easy reach of the driver and passenger.

The module communicates with temperature sensors, body electronics, and the A/C compressor, transmitting control signals to other system components. This allows for maintaining stable thermal conditions inside the vehicle without the need for constant manual adjustment of settings.

Construction and vehicle integration

The controller is designed as an OEM component, meaning it fits the factory dashboard panel and is compatible with the original Mini electrical harness. The electrical connectors are prepared for plug-and-play installation, which facilitates the replacement of a damaged panel without the need for wiring modifications.

The module's electronic system is optimized for cooperation with the automatic air conditioning system, including fan control logic, air mixing flaps, and heat circulation from the heater core. This ensures the consistent operation of all thermal comfort functions in the vehicle.

Practical application and benefits of replacement

Replacing a faulty control panel with the presented module allows you to restore:

• correct temperature regulation for the driver and passenger,
• stable operation of the automatic air conditioning mode,
• smooth changes in fan speed and airflow direction,
• proper cooperation with the cabin heating and cooling system.

For Mini R57 LCI users, this is particularly important in cases of symptoms such as no response to setting changes, random air conditioning shutdowns, or improper fan operation. Using an original controller from the same family ensures the preservation of the system's factory operating parameters.

Characteristics of the used component

The module comes from the secondary market, meaning it is a used part intended for further operation after installation in the vehicle. This type of solution is often chosen as a technically sound alternative to new components, especially in the case of advanced electronic elements where compatibility with a specific model version is key.

Before installation, it is recommended to perform a standard verification of the vehicle's electrical system and, if necessary, adapt the module according to the service procedures used by the Mini brand.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the thermal comfort zone in your Mini and need other elements from the same group, such as control panels, adjustment modules, or additional controllers, check the available parts in the Mini climate control units category.

To better understand the relationships between the climate controller and other system elements, including the compressor, it is worth reading the service guide: A/C compressor – failure symptoms, causes, and safe replacement. Additional information on selecting secondary market components is also provided in the article Best used car parts – a guide to the most frequently chosen original parts, which helps in making informed choices for popular car models.