Some of these vehicles comes with no cabin air filter and there is no word about it in owners manual - Cabin air filter replacement for Kia Sorento 2005 and only way to find out is look it up yourself, most cars cabin air filter is located behind the glove-box - there you can find bay area where replaceable air filter door would be located.
Here is video below how to replace cabin air filter on 2005 Kia Sorento
0:04 Disassembling glove-box door: this is quite tricky sometimes and
you have to use bit brute force to pull it out upwards while glove-box
door is half-open from their hinges, defiantly one side at the time then
the other side.
0:43 Disassembling metal frame to gain access to the cabin air filter
door
01:22 Opening the cabin air filter door and removing old air filter
02:13 Installing new cabin air filter, arrow must point towards left
(direction of car motor - if you have left-hand driving car) basically
arrow must face airflow direction.
03:22 Assembling metal frame and glove-box door - inside notches lined
up first while door is half-open and then push hinges to their spot and
you're done installing new cabin air filter.
