I'm trying to change my serpentine belt on 2011

SOURCE: replacing serpentine belt 2002 dodge stratus

Did this on my 2002 Stratus 2.4L. I agree with other poster, you do have to remove the passenger tire and wheel wall to do it, but the tensioner travels clockwise.
Note: I offer this solely as a description of how I accomplished the task on my vehicle. It should not be taken as me advising anyone else in any way on how or whether they manage to repair their own vehicles.

1) Engaged parking brake, loosened lugs on passenger front tire.
2) Jacked-up and placed jack-stand.
3) Removed piece of black under-carriage which surrounds the oil filter and attaches to front bumper. There are at least 10 plastic push-pins to remove and I managed to destroy half of them in the process.
4) Positoned belt over lower pulleys and tensioner (as best as possible) then used a bungee to hold the top end of belt up while I worked under the car.
5) Used a 3/8 ratchet and inserted into square hole attached to the tensioner, disengaged the tensioner (moves clockwise) then used a brace to keep the ratchet handle in that position.
6) From top, removed bungee and finished placing belt over alternator, checked the position of entire belt, reengaged the tensioner, and replaced wall and wheel.

SOURCE: I'm trying to change my serpentine belt on 2011

2011 Dodge Nitro change serpentine belt YouTube

All are pretty much the same.