Most reliable cars Best and worst predicted reliability, according to Consumer Reports survey research. Back to story Most Reliable Luxury Car Most reliable (Best score first) 2006 Lexus LS (2007 model pictured) Infiniti M* Least reliable (Worst score first) Cadillac STS (V8) 2006 Mercedes-Benz S-class Mercedes-Benz CLS* Mercedes-Benz E-class sedan BMW 7-series Jaguar S-type 2007 models unless otherwise noted. *Predicted reliability based on only one model year.

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