[Replaces Part Number:] 4W7Z19A706A JA1507 4P1369 RU-408 973-553 RU1102 .Please Check the OEM Part Number and Make Sure Your Part Number Matches this Part Number Before Buying! [Buyers Guide (Reference Year/Make/Model search for proper fitment):] compatible with FORD CROWN VICTORIA (11-05) compatible with MERCURY GRAND MARQUIS (11-05) If your heater fan or air conditioner blower on blows on high speed or low speed, you might have a failed blower motor resistor. A faulty blower motor resistor needs repair because it controls the fan speed in your vehicle's heating, ventilation, and air conditioning (HVAC) system. When the resistor fails, the fan might get stuck at one speed or not work at all, making it difficult to regulate the temperature inside the car. A bad resistor can also overload and damage other components, like the blower motor itself, if not addressed promptly The Dcmr HVAC Blower Motor Resistor come with 12 Month Warr-anty. Hassle-free Return and Refund Policy. Please Buy it with Your Confidence. Replacement For Ford Crown Victoria 11-05 Replacement For Mercury Grand Marquis 11-05