BMW MINI Cooper One R56 R57 R58 R59 HEATER BLOWER MATRIX BOX VALEO 3423705

BMW MINI Cooper One R56 R57 R58 R59 HEATER BLOWER MATRIX BOX is a complete air ventilation and heater housing unit designed for the MINI R56–R59 series. This component is responsible for efficiently directing airflow within the cabin, integrating with the heater core, and providing a stable mount for the blower motor, which is crucial for thermal comfort and windshield defrosting. Thanks to the OEM design by Valeo, the part maintains a factory-perfect fit for the MINI interior architecture.

Specifications and technical data

• SKU: rhd-3423705
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 64113423705
• Substitutable numbers: 64119266891, 9266891, 64113448070, 3448070, 64113453612, 3453612, 64113423705, 3423705
• Category: HVAC Blower Motor & Wheel

Purpose and function in the MINI ventilation system

The heater blower matrix box serves as the central air distribution module in the cabin of the MINI Cooper and One R56, R57, R58, and R59 generations. It houses the blower motor and the components responsible for guiding air through the heater core and subsequently to the windshield, footwell, and center dashboard vents. A correctly selected housing ensures system airtightness, stable component mounting, and proper airflow at various fan speeds.

By utilizing an OEM solution from Valeo, the housing is structurally compliant with MINI's factory requirements, which facilitates installation into the existing system without the need for modifications. This is particularly important in vehicles where precise fitment of components behind the dashboard is essential.

Design and fitment for R56–R59 models

The presented heater blower matrix box has been designed specifically for the interior architecture of the MINI Cooper and One R56, R57, R58, and R59 series, which translates into the correct positioning of ports, mounting points, and sockets for associated components. The housing belongs to the Blower motors and wheels category, serving as the mounting base for the ventilation motor and related HVAC system components.

Such fitment reduces the risk of improper installation, unwanted vibrations, or leaks that could cause noise, reduced ventilation efficiency, or uneven cabin heating. In practice, this means the ability to efficiently replace a damaged housing with a part that meets MINI's factory specifications.

Benefits of using an original Valeo housing

Using an original heater blower matrix box in a MINI provides a number of practical operational benefits:

• preservation of the factory airflow geometry in the ventilation system,
• stable mounting of the blower motor and associated components,
• reduction of unwanted noise and resonance behind the dashboard,
• easier service access for future work within the ventilation system.

For the user, this means more predictable ventilation performance, more effective windshield defrosting, and comfortable heating system operation in typical urban and extra-urban conditions. The used OEM component also allows for optimizing repair costs while maintaining compliance with MINI's factory specifications.

Condition, verification, and selection based on technical data

The offered housing comes from a Mini vehicle and is classified as a used part, which in practice means it retains full functionality while showing signs of wear typical for this type of component. Before being listed, the item is verified for housing integrity and suitability for further use in the ventilation system.

Selecting the right heater blower matrix box for a specific MINI version should be based on technical data such as OEM markings or interchangeable part numbers. In case of doubt, selection procedures known from other drivetrain components may be useful – described in more detail in our guide: Why it is worth buying used gearboxes and engines – facts instead of myths. An analogous approach to verifying numbers and compatibility helps reduce the risk of purchasing an incompatible part.

Expansion and service of the MINI ventilation system

If you are planning a comprehensive repair or upgrade of the ventilation and heating area in your MINI and need other elements from the same group, such as blower motors, blower wheels, or additional ventilation modules, check the available parts in the Mini blower motors and wheels category.

For owners of sporty MINI Cooper S variants interested in a broader approach to drivetrain modernization and improving the car's characteristics, an expert article on turbocharger selection may also be helpful: Go-Kart Feeling XXL: used N18 vs. B48 turbocharger – what to choose for a Mini Cooper S?. It allows for a better understanding of the relationship between the selection of used parts and the final performance of the car.