CarMD.com Corp., a provider of car repair data, released its 2013 CarMD Vehicle Health Index™ ranking of check engine-related car repairs and costs for model year 1996 to 2012 vehicles. For the first time in six years, car repair costs jumped 10 percent nationwide to $367.84 on average per repair.

The no. 1 most common repair remains a faulty oxygen sensor, which can reduce fuel economy by as much as 40%. With gas prices and repair costs rising, this annual Index sheds light on vehicle failure data and repair trends that impact safety, reduce fuel economy and can result in more expensive and spiraling repairs if left unaddressed.