Lower cover wing-nut. SEDAN. W/DUAL ZONE CONTROL. A Screw that is used to secure the HVAC Case Cover to it's mounting point. A Screw that is used to secure the HVAC Case to it's mounting point. A Screw used to secure the cabin air filter Cover to it's mounting point. A Screw which holds the instrument panel Cover to it's mounting point. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Cabin Air Filter Cover. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the HVAC Case. Heater Core Access Cover Screw. HVAC Blower Motor Cover Nut. HVAC Blower Motor Wheel Nut. B Motor Wheel. Cabin Air Filter. Fan and Motor -. Heater Core Access. Instrument Panel. Sound absorber -. Thumb. Under. Unit Case. Included with: Blower Case.