After removing the air filter for the heating/air conditioning, I found that a mouse had set up shop on top of the filter (found many seeds, fecal matter, and pee) and also chewed through the filter in several places. Obviously, vermin can gain access to the inside of the heating/air conditioning system, NOT GOOD! I installed a wire mesh screen under the filter (screen window material) and replaced the filter with polyurethane material used for filters in air conditioners. I cut the filter material to approx. 8.5" x 7.75". The wire screen should prevent vermin from exiting the heating/air conditioning and getting into the cabin. I also placed a mouse glue trap on top of the filter in order to capture the little bast**d. I am not pleased to learn that the design in the RAV allows vermin access to my passenger compartment. If that little vermin ever showed his face to my wife, she would have exited the vehicle irregardless of the speed she was traveling.