The Nissan Pulsar has a generally good reputation for reliability, although the CVTs can be expensive to fix they go wrong. All reported faults for this model are listed, here: www.honestjohn.co.uk/carbycar/nissan/note-2013/good

The decision to keep the car or take out a new lease will very much depend on your son's personal financial circumstances. But I would suggest checking the value of the car before accepting the final payment. You can look up the value with our free price tool, here: www.honestjohn.co.uk/used-prices/