My personal experience:
2006 Jeep Liberty, spun rod bearing; 20k miles.
2001 Jaguar XJR, short in the electrical system frying the wiring harness and ecu; 3 days old. Totalled, replaced with another XJR by Jaguar.
1999 Dodge Durango 5.9SLT, trans went out; 4 days old
1998 Hummer, cracked decompression chamber in head lead to a cracked engine block, 6.5TD; around 30k miles
Things go wrong with cars, that is why there are warranties.