You do not. But you should.So you do or do not have to remove the bumper to clean the filter?...
You dont need to take it off. You do however need to loosen it so you can wriggle that sucker out of there. I take off my grille, headlight, and take out some of the screws in the fender lining. Then after turning the wheel to let me get my hand in there, I loosen the filter from the top (loosen the clamp holding it to the rubber elbow) and pull it out through the loosened lining in the wheel well. Its a tight fit and hard on your hands but doable in about 10-15 minutesYou do not. But you should.
With the bumper on, it will take you a LONG time and it will be a pain in the ass.
With the bumper off (takes about 10 min) it will only take about 30 minutes to remove clean and replace.