I have an X9 superwinch on the GUiV. I bought it second hand and it looked unused. It had been on the front of a 200 series and when I got it home I bench tested it. It was fully seized and rooted.
I stripped it down and rebuilt the gearbox and then the motor as both had been full of water and were solid.
Don't take it for granted that the winch on the front of your car for 5 years and never used will still be ok to use. Test it, service it at least once a year. It's not hard to do and take a couple of hours and then will not let you down when you really need it.