My Northstar Igloo is approaching 20 years old so this thread got me thinking of the replacements I have needed. The RV was 5 years old when I bought it.
I replaced the old batteries and after 7 years my AGM batteries started to show significant loss of capacity so I replaced them. I probably should have just done an equalization since I never did that during those 7 years.
Water pump started to slowly leak at year 10. I replaced rather than do a rebuild.
Solar controller died suddenly, year 7. I upgraded to a better unit, year 12.
Converter died last week, year 17.
I have lost track of the dates, but I had to replace 2 Happijack motors and one complete jack. I never did any maintenance on the jack. The motors died from water intrusion and I have since sealed or at least tried to seal all of the motors. The old motors were poorly designed without suitable seals.
Several window props have broken. The parts costs are beyond belief so I use office binder clips to hold the windows open the amount desired.
About year 8 I had to replace a couple of plastic drawer slides.
Back door latch broke, year 14.
I am not going to carry a bunch of spare parts because I think anything could go at any time.