The woman was sitting in the back seat of a 2014 Lexus sedan that was left running when it was stolen Friday morning, officials say.
The woman, the mother of the car's driver, was described as non-verbal and non-ambulatory.
On behalf of LAPD, the CHP issued a missing endangered alert Friday - but within an hour canceled it, announcing the vehicle and woman had been found.
"Earlier today, a car that was left running was stolen. Inside the stolen car was the victim's 92 year old mother," the LAPD tweeted. "A silver alert was issued while officers desperately searched for the car."
"When the car was found, with the 92 year old mother unharmed, the victim was overjoyed."
It was not immediately announced if a suspect was arrested when the vehicle was recovered.