Review on Premium Quality PG Cabin Air Filter PC99350 for Mazda CX-9 2016-2021: Enhance Air Quality for a Cleaner & Healthier Ride by Chris Rob

Fits perfectly in existing case, easy to swap out, no tools required (unless you can use a butter knife or something to pry case out, if fingers don't help I used my fingers), easy instructions to follow. Also a very good video online if needed. Extract the glove box by opening it and then pulling out the cable on the right, sliding its support down, extracting the compartment, then extracting the old filter housing, removing the filter from the housing, inserting the new one and reinstalling it . where he left off. Plug the cable back into the box, close it, done.