We had a 2003 Supercharged Xterra with 178K miles in the shop today for a no start issue.
Distributor wasnt rotating.
He pulled the timing cover off and found the tensioner was no longer providing tension. You could move the belt around on the sprockets by hand. I snapped a pic of the busted belt teeth.
Timing belt had never been done on the truck before ever!
It also had a leaking power steering pressure hose, leaking oil from the oil pan (was down 1 quart of oil) and no oil dipstick!