Here are the reasons I am replacing the locks on my trailer:
1.) The locks on the basement doors use the same key (CH751) that is used in almost every RV manufactured in American and in other industries too (found out it is also common with some generators and other latches).
2.) The locks on the basement doors are HORRIBLE quality. In the first week I found the key openings/apertures were denting, which over time make it a P.I.T.A. to insert the key. So when I upgrade the basement door locks for security reasons, I'm also going to a different type of lock that uses a different type of key to make inserting the key much easier.
3.) The door latch (on mine at least) has two locks, one of which opens with a universal key available from any dealer. The other tends to be less standard. I want to replace this lock for this primary reason, but I am also researching whether or not a keyless entry is any safer or easier to use. Ideally, I would like a lock that is better all around, and I know they make several different replacement latches/locks for the door, but I don't know if they are universal, and if not, which ones work and which ones don't. The key opening/aperture on my door lock is also denting easily.