On a 99 Pathfinder, when is the timing belt supposed to be changed? Was changed once, but don't know when. Currently has 160k miles

Generally, spark plugs used in cars today are supposed to last up to 100k. Most experts recommend replacing the plugs and fuel filter every 35,000 to 50,000 miles. The timing belt and serpentine belt should have been replaced at 75,000 miles and the transmission fluid should have be serviced by now.

2004 Rav 4 has a timing belt and not a chain and it can last you about 160k's depending how it was used but replacing it at 100 is a safe margin.Factory installed belts are due for a change at 140k's.

Oddly, rather than 100,000 miles, the recommendation for a timing belt change on this vehicle is 105,000 miles

Nissan suggests the timing belt be replaced every 103,000 miles. If the belt has never been changed I would say you're living on borrowed time. This is an interference engine so if the belt fails you could end up with a seriously damaged engine.

The timing belt should be changed every 60,000 miles cuz when they break they can do alot of damage to the engine. The 2001 Pathfinder might have a chain but it should still be checked at 60,000 miles.

based on the mileage it is about time to change the timing belt. this should be done by a professional or someone with internal engine expertise. it is nothing like changing a fan belt.

It sounds like they are doing a timing belt, water pump, engine check, spark plugs , the works. I hope. I would find out exactly what they are proposing and then think about it, there are other shops that do this stuff. I know my bike is supposed to go in once a year for this service and it is $600 min each time they do it. I've only had it done once. 2002 Ducati S4

timing belts and chains are 2 very diff things, belts are rubber and wear out in about 80,000, chains are well chains and made of very strong steel they will last the life of the engine in most cars and trucks but not all cases. there is no recommended change mileage by any manufacturer, if the engine is torn down for an overhaul then yes it is wise to replace the chain, but only then, otherwise it is a very expensive waste of money.

between 65000 and 100000 miles is the service interval

that sounds like a bad universal joint on the transfer case to the front axle. have that checked out