Of course it does, when its not a simple cosmetic interior piece. Not snapping in an interior piece, OK, big whoop, but doing the same to say a PCV connector can be a big deal. Or for example on the general Hyundai forum I'm on someone noticed that the worker had cross-threaded a suspension bolt really bad, and rather than fess up to the mistake just let it ride and the suspension clunked massively until they figured out which bolt it was that was screwed up (no pun intended). Heck, Hyundai's biggest recall in recent history was for 1.2 million vehicles w/ Theta II engines where it was blamed on assembly issue where the workers were supposedly doing a half-ass job on removing all the metal shavings from machining before final assembly of the engines. The shavings got into oil passages partially blocking them leading to lots of premature wear or complete engine seizures. At least that was Hyundai's explanation for the problem, others said it was a design defect, but can't know for sure.Poor assembly (especially interior bits) has nothing to do with reliability unless the thing that wasn't snapped in properly causes a failure of some kind.
In a previous life I found Consumer Reports biased material on automobiles, years ago they loved beating up on domestics. You only had to look up their assessments of the Geo Prism and it's twin, the Toyota Corolla or the Pontiac Vibe versus the Toyota Matrix. These cars were identical to each other.That is what I said, missing bits aren't a problem... until they are
I personally don't put that much faith into what Consumer Reports says. They claim my Dakota is a POS that should be avoided at all costs, yet its been one of the most trouble free vehicles I've owned. Especially when you factor in its work load (constant towing) and time on the road (20 years). On the flip side I bet there are people who purchased recommended vehicles that constantly broke down (like my wife's Volvo... ugh). The problem with all these predictions is sorting thru the noise and getting down to understanding a true flaw vs some random issue.