Audi Blower Motor Resistor 4E0820521

The OEM blower motor resistor, part number 4E0820521, is a critical component in the HVAC system of various Audi luxury models. This factory-original part is designed specifically for the 2004-2010 Audi A8 Quattro and 2007-2010 Audi S8, ensuring optimal performance with the 4.2L V8 and 5.2L V10 engines. Commonly referred to as a blower motor control module or HVAC blower motor regulator, this resistor regulates the speed of the blower motor, allowing for precise climate control within the cabin. As vehicles age, issues such as inadequate airflow or non-functioning fan speeds may arise due to a failing blower motor resistor. By replacing a worn or damaged resistor with this genuine component, you can restore proper ventilation and maintain a comfortable driving environment. This resistor is compatible with several alternative part numbers including 4E0820521A, 4E0820521B, and 4E0820521C, enhancing its applicability in repairs. Ensure your vehicle's climate control system operates smoothly with this authentic OEM part.