Mini R57 Cabrio Automatic Air Conditioning Heater AUC Control Unit 69817002

Visual condition of the part

The product shows signs of use visible in the photos.

Mini R57 Cabrio Automatic Air Conditioning Heater AUC Control Unit is an original air conditioning and heating system controller designed for Mini models with automatic transmissions. This component is responsible for the precise management of the air conditioning, airflow, and AUC functions, ensuring stable thermal conditions in the cabin. It is a used OEM component that allows for an efficient and technically correct repair of the factory comfort system.

Specifications and technical data

• SKU: 3455302-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 3455302
• Substitutable numbers: 69817002, 64113455302, 3455302, 64113454862, 3454862
• Gearbox type: Automatic
• Category: HVAC Controls & Control Units

Purpose and function of the controller

The Mini R57 Cabrio air conditioning controller operates within the automatic temperature control system, integrating signals from sensors and body modules. It is responsible for:

• controlling the air conditioning compressor and heating system,
• monitoring the blower fan speed,
• managing air distribution to individual zones,
• handling the AUC function (automatic recirculation based on air quality).

As a result, the driver receives stable and predictable air conditioning performance, and the interior remains comfortable both in city traffic and during highway driving.

Compatibility with automatic transmission

The presented module has been designed to work with an automatic transmission, which is crucial for proper communication with the vehicle's electronics. In practice, this means:

• correct data exchange with the transmission control unit,
• adjustment of air conditioning operation to engine load and driving mode,
• maintaining factory comfort parameters in automatic versions.

Selecting a controller compatible with the transmission type minimizes the risk of CAN network errors and integration issues after installation.

Benefits of using an original Mini controller

Choosing an original air conditioning controller from the Air conditioning regulators group provides a number of practical advantages:

• factory fitment for the electrical installation and control panel,
• preservation of the original heating and cooling system logic,
• no need for wiring modifications or additional programming beyond standard service procedures,
• consistency of operation with other comfort modules in the vehicle.

This is a particularly beneficial solution for workshops and users who expect a technically correct repair without experimenting with replacements.

Condition, origin, and practical application

The offered item comes from disassembly and is classified as a used OEM component. Such parts are frequently chosen for air conditioning repairs in older vehicles, where combining quality with reasonable service costs is key. The module will prove useful both when replacing a damaged controller and when restoring full air conditioning functionality after previous, unsuccessful repairs.

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, airflow regulation modules, or additional AUC controllers, check the available parts in the Mini Air conditioning regulators category.

Support with selection and repair time

When selecting an air conditioning controller for a specific equipment version, it is worth paying attention to compatibility with the body electronics and transmission type. Used OEM components available immediately allow for significantly shortening vehicle downtime in the workshop – especially in the case of failures that immobilize the windshield defogging function or automatic temperature control. More on how the availability of original components from disassembly affects repair time can be found in the article Availability of car parts off-the-shelf vs. repair time – how do used OEM parts shorten workshop stays?.

For users interested in the broader context of using used premium parts in higher-class vehicles, including brands similar in segment to Mini, the guide on our blog may also be helpful: Used parts for Mercedes – original parts from disassembly, which discusses the practical aspects of choosing second-hand OEM components.