I have exactly the same model in Inferno orange, I was always aware it was never full leather, as it isn't Lexus branded or the like. The outer parts of the seats are all leather, with the part you sit on is vinyl. Im pretty sure the steering wheel is polyurethane, even though it has real stitching all around. I do not have a problem with it, as the equivalent cars, the XR6 and SV6 don't even have leather seats or the like. I'm quite happy with my ZR6, fake leather or not, dual air con and power seats (something late model XR6 and SV6s still don't have to my understanding)