Toyota Motor Corp.'s Scion line, a U.S. experiment intended to win over young buyers with idiosyncratic designs and low prices, will overhaul its lineup amid fading sales as the brand reaches adolescence.

Beginning in 2015, 12 years after Scion's establishment as Toyota's third U.S. brand, the company will introduce the first of three new vehicles, Doug Murtha, vice president of Scion sales, said Wednesday in an interview at the New York International Auto Show. While Scion will continue to offer about five different models, Murtha declined to say which current products will be discontinued.

"Beginning in November in Los Angeles, we're going to show the first of three new products that will come to market within a 24-month period," Murtha said. "Beyond that, there are no real specifics on what's going to sunset and what's going to stick around."