Mini R56 R57 Heater Air Conditioning A/C Blower Matrix Box Valeo Diesel 3453622

Mini R56 R57 Heater Air Conditioning A/C Blower Matrix Box Valeo Diesel is a complete heater and air conditioning housing unit designed for Mini vehicles with a Diesel engine. This component is responsible for efficient airflow management in the cabin, working in conjunction with the heater core and A/C system to ensure stable thermal conditions inside the vehicle. This is an OEM solution that allows you to restore the proper operation of the ventilation system without the need for aftermarket replacements with uncertain parameters.

Specifications and technical data

• SKU: rhd-9266896-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 9266896
• Substitutable numbers: 64119266896, 9266896, 64113453930, 3453930, BG
• Fuel type: Diesel
• Category: Other Air Conditioning & Heating

Purpose and function in the Mini air conditioning system

The described heater and air conditioning housing is the central element of the airflow path in the cabin of Mini R56 and R57 series vehicles. Inside, it houses the blower fan and components responsible for directing the airflow through the heater core or the A/C evaporator. This enables precise control over temperature and air distribution to individual interior zones, which translates into thermal comfort for the driver and passengers.

The version designed for diesel units is adapted to the operating characteristics of the Diesel engine, including typical coolant temperature ranges and the specifics of cabin heating. Using the original Valeo design allows for maintaining factory airflow parameters and compatibility with the vehicle's electronics.

Design and advantages of the Valeo construction

The heater housing is designed as a sealed, multi-chamber box containing air ducts and flaps that control the direction of airflow. This design reduces pressure loss and noise while enabling precise air distribution to the windshield, footwells, and central air vents. The use of OEM Valeo solutions ensures stable operation of the ventilation system even under long-term load.

The component is prepared for integration with the factory blower fan and Mini control equipment, which facilitates installation in place of the original part. Thanks to the retention of the serial housing geometry, there is no need to modify the electrical installation or air ducts in the vehicle.

Benefits of using the original heater housing

Choosing the original heater and air conditioning housing for the Mini R56/R57 provides a number of practical benefits:

• maintenance of factory cabin heating and cooling efficiency,
• proper cooperation with the air conditioning and ventilation control system,
• correct airflow guidance, reducing windshield fogging,
• compatibility with the installation intended for Diesel engines.

This allows for effectively restoring the efficiency of the HVAC system after a mechanical failure of the housing, damage to control flaps, or wear of internal components. This solution is particularly advantageous for repairs where maintaining consistency with the vehicle's factory specification is a priority.

Condition, fitment, and service application

The presented item is a used part, which allows for an economical repair of the heater system while maintaining original build quality. In practice, this means the possibility of replacing a damaged housing with an OEM component without the need to invest in new, expensive sub-assemblies. For workshops specializing in the Mini brand, this is a solution that allows for optimizing service costs while maintaining a high level of reliability.

The heater and air conditioning housing will work well both for standard replacement of a damaged element and during larger service works within the dashboard, when access to the HVAC system is already provided. In such a scenario, replacing the complete heater box is often the most rational solution.

Related categories and technical materials

If you are planning a comprehensive repair or upgrade of the cockpit area and heater system in your Mini and need other elements from the same group, such as air ducts, air vents, or additional control modules, check the available parts in the Other Mini category.

For a comparison of solutions used in other brands and a better understanding of design differences in sports versions of models, it is worth checking out the technical material describing Audi powertrains and chassis – you will find it in the article Audi RS vs other models – what is hidden under the hood and chassis?, which helps organize knowledge about components used in high-performance cars.