2001 sentra timing issues

https://www.instructables.com/Adjusting-Nissan-Sentra-Serpentine-Belts-1/

https://www.justanswer.com/nissan/2wqbs-change-belt-nissan-sentra-2001.html



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Timing Belt most likely.

This vehicle has a timing chain.

Probably pretty expensive considering all the parts that have to be removed to do the job. You really should not need to replace the timing chain unless you have a problem with it. I am assuming this car has a ka24 engine and to replace the timing chain the valve cover timing covers and oil pan need to be removed. If you have never replaced your spark plugs its probably time to do so. check the belts and filters and you should be good.

The 2002 Sentra's have a timing chain.

after 100000 km

The sentra has a timing chain.

good day Sir, your nissan sentra 1999 gxe have a timing chain this is some tips for your routine maintenance.
Replace engine oil
Replace engine oil filter i

it has a timing chain, no service is needed for a chain.

this is a long answer to type out suggest you buy a chilton or haynes manual at locale auto parts store.they give a good step by step with pictures. you will need for the timing marks