||I am on my 4th year with my RV. I did blow a spark plug out of its base on the second trip. We uncoupled the tow car and picked up a new spark plug and was back on the road in under an hour. When I got home I replaced all of the plugs. No problem since. In the third year I found shreds of the serpentine belt hanging while parked in my own driveway. We replaced it for $40. The engine labors in the mountains so we have decided to uncouple the tow car and drive it separately but other than that we have experienced no issues with our aging RV and its Triton engine with 57,000 miles on it.
The motorhome is another issue and we have one situation or another on every trip. Its good to stay on top of things so the breakdowns are convenient.