Holstein Blower Motor Resistors are direct OE replacements for these critical interior heating and AC system components, offering perfect fit, form, and function for flawless operation that restores your vehicle to factory levels of performance. Blower motor resistors are responsible for changing blower motor speed in response to dash control movement; a non-functioning or erratic blower motor is often a symptom of a bad or failing blower motor resistor. Precision engineered sensors - manufactured from premium materials - exactly duplicate the function of the OE component, ensuring precise fan speed control for your vehicle. OE matched connectors and terminals, made from premium materials, are used to ensure an accurate, easy connection to the vehicle's wiring harness. Backed by Holstein's 3 year/36K mile - we believe in our parts and our shows it! Arrives packaged in a Zip-Loc style anti-static bag that protects the electronic circuitry and components. The Holstein brand represents a blend of advanced technological innovation and exacting European craftsmanship that stretches back over half a century. This tradition of precision engineering, rigid standards, and optimum performance guides us as we continually strive to enhance our offerings and adapt to continuing challenges in the marketplace. Holstein parts are built to meet OEM specs for form, fit, and function, and provide an outstanding value at any level. Holstein - Parts that perform. Service that delivers.