|Air Filter for Prius 2004 to 2009 - extend the life of your hybrid battery|
Intake about shoulder height near the right rear passenger door. So lot of hair, fibers and dust can get sucked in as passenger enter and leave. Most gets stuck in the fan which restricts cooling air plus some gets blown onto the top of the battery where it can sit on the battery cooling passages.
YOU CAN AVOID ALL OF THIS WITH A FILTER THAT JUST NEEDS TO BE VACUUMED OCCASIONALLY!