the Serena has different engines so depends on what engine yours has, the best way to get this right is to buy a belt from Nissan the timing marks are on the belt just line everything up
Your 1998 Nissan has a timing belt. Every combustion engine has a timing belt. The automaker recommends you change the timing belt every 60,000 miles.
nissan micra has timing chain or cam chain and should be replaced at 200.000k
Both the 2.0 and 2.3 Ltr have a recommendation of 54,000 or 60 months
The Nissan maintenance manual states that the timing belt should be replaced at 103,000 miles.
Normally it will last the life of the engine and is replaced when the engine is overhauled.
The manufacturer recommends that you change your 2000 Nissan Frontier four-cylinder engine timing belt every 60,000 miles. The 2000 Nissan Frontier does not have a timing chain, it has a timing belt.
The recommended mileage to change a timing belt on a 1995 Nissan Pathfinder is 100,000 miles. The belt may need replaced before this.
The timing marks are on the belt and the sprockets. not on the engine! the box that the belt is supplied in shows the mark locations. well i use Gates belts and these do!
120,000 miles is pushing it i am told
Timing chains are designed to last the life of the engine and are normally replaced during a complete engine rebuild.
Timing belts should be changed approximately every 80,000 miles.Check with Nissan about your specific vehicle. Several Nissan cars and trucks do not use belts, They use chains and almost never have to be replaced.
Nissan ga15 timing diagram