The recommended mileage to change a timing belt on a 1995 Nissan Pathfinder is 100,000 miles. The belt may need replaced before this.
Every 60,000 miles.
The Nissan maintenance manual states that the timing belt should be replaced at 103,000 miles.
The 2001 Nissan Pathfinder has a 3.5 liter engine with a timing chain rather than a belt. http://www.samarins.com/reviews/pathfinder.html
The 2004 pathfinder has a chain not a belt 3.5 litre engine only the 3.3 has a belt and that engine was in the 2000 year model the 3.3 is not in the 2004 model
Get a mnaual on your car from the parts store or AUTOBOOKSONLINE.COM
THERE IS ALOT TO IT.FIRST GO TO AN AUTO PART STORE AND BUY A CHILTON BOOK...
Must be changed every 60,000 miles. Warning: This is an interference engine. If the belt breaks you will have internal engine damage.