what engine and year

for a 4 year old car, i would push for a new replacement free.
even though car out of warranty, you can argue equipment not fit for purpose after only 4 years.

possibly heat shield near exhaust, if there are any.

Wonder if the 1.6 L petrol is affected.

this forum is for the nissan pulsar C13 model, only started production in 2014.

the noise gets more noticeable when going around a bend, that's usually a good sign bearing is on way out.
get the garage to road test the car, that should convince them there is a bearing issue

The Pulsar has similarities to both the QQ and Juke, so possibly checking out those makes could be a pointer to resolving Pulsar issues.
Have not heard of a workshop manual for Pulsars, likely due to production been stopped.
Are there any Nissan techs on here who can confirm any of this.

no idea,
with this corona virus issue here in uk, who knows when things will get back to anywhere near normal.

Further question PulsarNismo94, under normal servicing would ECU updates be a part of any service. I am interested in possible remap but might be reluctant if I then lost it via ECU update unless company doing remap guaranteed to reinstall if that scenario happened. 1.6 L 16 plate, 32,500 miles done...

what happens to remap when serviced