Timing chain 160 SR

Hello all, anyone changed the timing chain on a 160 SR ?. just had a the car serviced & the mechanic said he thinks the timing chain is in need of a change , i had noticed it was making a very slight noise / rattle sound .
2500 revs, very light on the throttle, you get a bit of a rattle? A new chain isnt a bad idea depending on miles and how long you want to keep the car, but it won't get rid of the noise I'm semi confident, just look up 'Nissan HR engine rattle 2500 rpm', it was an issue even on low miles, almost new cars