I'm not a big guy and I had similar noises from my lexus seats after a few months... Maybe 2500 miles. My coworker has similar issues with his acura seats at 35000 miles.
I was able to fix both of them. It happens because the foam presses/rubs against metal parts and becomes "squeaky smooth".. As I call it. My lexus seats were on the hip bolsters and the aura on the back/side bolsters.
I put lithium grease between the foam and the metal and neither of us had another problem 4+ years later.
If it's in an easy to access spot, you could easily fix it yourself.
I was able to fix both of them. It happens because the foam presses/rubs against metal parts and becomes "squeaky smooth".. As I call it. My lexus seats were on the hip bolsters and the aura on the back/side bolsters.
I put lithium grease between the foam and the metal and neither of us had another problem 4+ years later.
If it's in an easy to access spot, you could easily fix it yourself.