The "blower intake" is what i think he meant, because that's the first thing that caught my eye, and i'm saying this with a negative connotation. It's way too big... Also, with that same meshing i see used everywhere, consider Transform>Perspective. It'll give the impression of depth rather than flat-on-cut-and-paste.
The spoiler is incorrect, unsure how to explain but it looks like the wing and the "side " aren't properly attached.
The Side Vent's midtones don't match the car's base paint quite right
Why is the left lamp darkened? it was good the way it was before...