Depends on your age..lol If you have a consol, it's a little harder.. if you have air,, pretty rough,, non air not too awful bad.. take out firewall bolts, take that bolt on the lower inside out,, by the kick pad, pull heater box out,, you have to pull the dash frame back yo clear the frame... Before you reinstall the new one, pressure check it.. I put a brand new one in my Charger, it leaked..