According to the 2011 CarMD® Vehicle Health Index,
Toyota is the no. 1 ranked manufacturer in the U.S., based on a ranking derived from the fewest percentage of “check engine” light-related related problems and lowest average repair cost. Toyota, which includes Toyota and Lexus brands, has the lowest Index rating of 0.67. The lower the rating, the better the overall ranking.

Rounding out the top five vehicle manufacturers of 2011 are No. 2 Hyundai, No. 3 Honda, No. 4 Ford and No. 5 General Motorss

CarMD currently has more than a half-million repairs in its proprietary database that apply to roughly 189 million on board diagnostic, second generation (OBD2) vehicles on the road in the U.S., including an estimated 136 million MY 2001-2011 vehicles, from which the 2011 CarMD® Vehicle Health Index and Ranking was procured. As a result of compiling the industry’s first and most comprehensive database of diagnostic trouble codes and repairs for ‘check engine’-related problems, CarMD is uniquely positioned to provide actual data on a wide range of vehicles and manufacturers

According to the 2011 CarMD® Vehicle Health Index, Toyota is the no. 1 ranked manufacturer in the U.S., based on a ranking derived from the fewest percentage of “check engine” light-related related problems and lowest average repair cost. Toyota, which includes Toyota and Lexus brands, has the lowest Index rating of 0.67. The lower the rating, the better the overall ranking.


Generally speaking luxury brands hurt their parent brands, with Buick and Infiniti as exceptions. Although the average repair costs were actually lower with the luxury brands, the reported repair instances were higher based on a percentage of vehicle population – in most cases about twice as common

The top 100 vehicles represent the best vehicles out of more than 900 different registered vehicles on the road today.  It is important to remember that even the 99th or 100th ranked vehicle on the top 100 list is a significant achievement, as this puts it in the top 10% of all vehicles on the road. 73% of the top 100 vehicles come from the top 5 ranked manufacturers: Toyota- 24; Honda- 16; GM- 15; Ford- 13; Hyundai- 5, with No. 1 ranked Toyota leading the pack with 24 vehicles in the top 100.

Ranked no. 5, GM was led by Buick, which produced many of the most reliable vehicles. Three of the top 100 vehicles were the Buick Lucerne (2006, 2007 and 2008 models).

Buick led the luxury segment and had Buick been listed as its own manufacturer, the brand would have ranked as the no. 1 best manufacturer overall. With a low problem occurrence rate and an exceptionally low $190 average repair cost, Buick’s overall performance stands out.

Different vehicle makes tend to have a unique set of problems and common failures. The CarMD Vehicle Health Index helps point out common problems by manufacturer, which is important for car owners to recognize in their maintenance and repair routines.