These are the worst performing cars for overall reliability. The higher the Index Rating, the worse the cars reliability is. Click the manufacturer for model specific details. Rank Car Make Index Rating       1 PORSCHE 240.01 2 JEEP 224.60 3 LANDROVER 211.71 4 ALFA ROMEO 155.59 5 CHRYSLER 152.19 6 JAGUAR 137.16 7 AUDI 135.50 8 SAAB 124.33 9 MG 120.08 10 MERCEDES 116.27   Inform me of site updates | Click here for: Top 10 Best Performers click here to buy a warranty ::  Site Credits    ::  Contact Us    ::  Legals    ::  Links