YXGOOD Rear Heater Blower Motor Transistor Resistor For Honda Pilot MDX 79330-S3V-A51 The item is the Blower Motor Resistor. It is just what you need to bring your heating and A/C blower system back to good working order! On most vehicles it is mounted to the HVAC unit inside the passenger compartment. It can be accessed from the passenger foot well area.