Hello, Problem with high mileage Xterras? ...timing belts when the last change? and it due for another one when at 200,000 miles or early perfer..
Lots of wear a tear on the all parts..? Please check the brakes? ...belts,hoses, battery, radiators, last spark plug change..cause the NO 6 plug is so difficult to reach...!
Make sure owner did regular oil changes every 3,000 miles for the life of the Xterra?
Nissan parts are NOT cheap....
Aloha, ..just my opinion here..!