2002 Pontiac Grand Prix GT 4dr Sedan (3.8L 6cyl 4A)
Bought it new as a leftover. Ran great until about 70,000 miles, then things started to go. Front wheel bearing failed and needed wheel replacement. Pitted brake disc. 2 Failed speed sensors. Failed AC compressor. Even the radio display failed so I can't see the time or station. Failed transmission solenoid is in such a difficult location, it takes 5 mechanic hours and more than $750 to replace.I've driven other brands over 150,000 miles without these failures.
Styling, handling, comfort
Poor quality parts doom a nicely designed car. So-called bullet-proof engine doesn't help if transmission, wheels, sensors, displays, A/C , etc. fail and cost a lot to repair/replace.