The crash occurred at the 7300 block of Conestoga Court on July 7, reports the San Diego Fire-Rescue Department.
The Ford bakkie splashed into the pool and sank to the bottom on its side, trapping the female driver underwater, according to Fox5.
Bystander Gabriel Mejia, leaped into the pool, broke a window and kept the driver from drowning.
Firefighters eventually freed the trapped driver who had suffered a head injury.
Check out the pics and video below: