Total outstanding U.S. auto loans reached a record high of $902.2 billion through April, an increase of more than 10% from the same time a year earlier, according to the latest Equifax National Consumer Credit Trends Report released Thursday. In that same time, the total number of auto loans outstanding is more than 64 million.

"Lenders are responding to record low delinquencies by offering great rates and terms, while consumers are responding to the improving economic conditions by making the decision to purchase newer vehicles. Additionally, subprime lending has grown across all sectors in 2014. This is good news as a fully functioning second-chance market is essential for a healthy economy," said Dennis Carlson, deputy chief economist at Equifax.

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