Our friends 2011 3150RL is cracking on the inside panel of the door. Around the door window and also around the door lock thing.
They look like hair line cracks in the inside fiberglass part of the door. Some are 2-3" long, some are like 1" long. The outside panel is not showing cracks.
We are Jim's friend with the door cracking problem. We have not contacted keystone, but guess we should. My husband thinks it may be caused by the stress put on the door on windy days. We have the strut at the top of the door that holds it open instead of latching it back to the rig like they do now.
We have the same year and model and have not noticed any cracking of our entry door. I'll have to check now that you brought it up. Our friends have the same year and model as well - I'll ask them to check theirs.
Good news, keystone came through . They are replacing the door and kicking in $200. towards labor costs of install. My hats off to them and the good will towards this Montana owner !!!