Pandora reached two milestones this week. The Internet radio service is now integrated into 2.5 million vehicles through 23 major manufacturers. It also has established relationships with eight aftermarket manufacturers.

OAKLAND, Calif. — Pandora, the Internet radio service, announced today that it has seen more than 2.5 million unique activations, thanks to relationships forged with 23 major automotive brands and eight aftermarket manufacturers.

"The vehicle is the traditional home of radio, and thanks to our deep roster of forward-thinking automotive partners, Pandora has been seamlessly incorporated into the dash of more than 100 different vehicle models made available by our partners,” said Pandora CMO Simon Fleming-Wood said. “We're thrilled that millions of people are enjoying Pandora through these integrations, which make listening to personalized internet radio as easy as AM/FM radio."

Approximately half of all radio listening takes place in the car and the ability to deliver Pandora through the native in-car entertainment system has remained a key focus for the company since announcing its first automotive brand partnership with Ford in 2010.

The company now estimates that one-third of all new cars sold in the U.S. market this year will have Pandora installed, including more than 100 vehicle models from Acura, BMW, Buick, Cadillac, Chevrolet, Ford, GMC, Honda, Hyundai, Lexus, Lincoln, Mazda, Mercedes-Benz, MINI, Nissan, Scion, Suzuki and Toyota. Pandora will also soon be integrated into Dodge, Infiniti, Jeep, Kia and Ram vehicles.

Pandora has also made significant inroads to the automotive aftermarket sector through partnerships with eight manufacturers, including Alpine Electronics, Audiovox, Clarion, Dual Electronics, JVC, Kenwood, Pioneer and Sony. Combined, these companies have introduced more than 200 devices that feature the Internet radio service.