My only horror was my daughter's cursed Nissan Juke. I see plenty of them around, so they must be majority OK, but I keep running into too many Nissan specific engineering bugs - meaning curious, non-standard design decisions that weren't reliable. Most of these tend to be related to cooling systems in either/both engine or transmission.
World and US specific emission and safety standards being what they are, there's likely only a few design decisions that meet those. Because of those, body sizes, engine designs, and other basic mechanical implementations are all about equal - there's just not many ways to optimize what must legally be present for mass sales. Couple that with global sourcing of parts and further optimized assembly practices, and most mass produced passenger vehicles start to be very similar is make up and reliability.
Of course, since everything is automated, you can get gremlins when the automation doesn't quite get there. For two weeks, a robot isn't quite in spec, so a wiring harness doesn't land exactly behind the heat shield. Maybe 5% of the vehicles in that run are affected, and only 10% of those will show symptoms if they're shipped to Houston, TX, and operated in harsh environments. By that time, the problem (which wouldn't necessarily show up as a problem) was corrected at the factory. Almost impossible to chase down as to why.