If the driver was not fair with his car (or her car) it does not make the RX fragile but all cars must be taken care of
Regarding the noise, was it constant or not ?
If yes, it could be the functioning of the ventilated seats if seats are perforated and when the button is activated by error, this creates a sound around the head when the ventilation is at max.

 

Thanks Alpy, Ive decided to stay away from that vehicle, so at least I wont have to figure out what it was.

Glad to hear it. I'm going from an Audi A4 with tints, aftermarkets alloys, shift paddles etc - to be honest i won't miss it (although it is a great car) I'm sick of being "challenged" at traffic lights! I'm 42 yrs old and I'm happy to slow down and enjoy the journey.