The average age of a light vehicle in the U.S. remained flat at 11.4 years at the end of 2013, according to a study by IHS Automotive.

The average age of vehicles will likely remain steady at 11.4 years through at least 2015, reflecting a rebound of the auto industry, and an increase in new-vehicle sales, according to the report.

"This year, we're seeing somewhat of a plateau in the market and expect it to remain over the next few years, without a major change in either direction," said Mark Seng, director of IHS Automotive's aftermarket solutions and global aftermarket practice, in a statement this week.

"We attribute this to a number of factors, including the economy and the increasing quality of today's automobiles," he added.

The average age is expected to increase to about 11.5 years by 2017 and 11.7 years by 2019.

IHS also forecasts that the volume of vehicles new-to five-years old will increase by 32 percent over the next five years.

Vehicles in the six-to 11-year-old category will be on the decline by 21 percent according to the study.

"Because of improved quality and consumers holding their cars and light trucks longer, vehicles 12-plus years old continue to grow and will increase by 15 percent by 2019," the report said.

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