[S100Y]

Seems like this is happening in leatherette-equipped cars?

Anyone with a cloth or leather seat chime in on their seats?

Mine is cloth seat (sport model) , the seats are absolutely fine just as on day 1. It is 8 months old and 6600 miles.

 

[S100Y]

Are your bolster foams around the area (on the pics) still firm and taut? No breakdown or misshapen?

Foam imperfections/weakness, either under smooth leatherette & leather (both stretch and retract back, on and off pressed/seated) would easily rear it's ugly head and easier to spot, than cloth.

Yes the bolster foam is absolutely firm and taut. I double checked the seat completely after reading this thread and there is no breakdown.