I just bought the new 4.0 for the front for of our 2016 Bighorn. It installed beautifully.
Then I tried to install the 4 new compartment door locks. Not so easy. First, I discovered that Heartland installs the inside cover with 4 screws and 4 pop rivets. I really don't want to remove the rivets. So, I slipped the new lock in under the old cover. It seemed to fit fine. Then I screwed in the battery cover on top of the inside cover. All seems good, until I tested the latch operation. It stuck and would not come back out. So, I backed the screws out until it popped out.
But now it is so loose, it rattles. Not acceptable.
Then I tried to install the 4 new compartment door locks. Not so easy. First, I discovered that Heartland installs the inside cover with 4 screws and 4 pop rivets. I really don't want to remove the rivets. So, I slipped the new lock in under the old cover. It seemed to fit fine. Then I screwed in the battery cover on top of the inside cover. All seems good, until I tested the latch operation. It stuck and would not come back out. So, I backed the screws out until it popped out.
But now it is so loose, it rattles. Not acceptable.