The 1st generation of the STS has a cumulative PainRank™ of 1.42. That can be compared against other Cadillac generations. Shopping for a Cadillac? This generation is generally a good bet.
Owners of the 2005–2011 STS model years have sent in 24 complaints on CarComplaints.com. We've listed the three most common below. Most are about the electrical (33%) followed by the engine (25%) and the airbags & seat belts (12%).