The vehicle crashed into a cinder block wall just off the northbound 5 Freeway at Calzona Street just around 9:54 p.m.
The driver and at least some of the passengers were trapped in the car and firefighters had to extricate them.
The occupants of the vehicle were described as four males, between the ages of 12 and 14, including a 14-year-old driver. A Los Angeles County Sheriff's Department spokesperson initially said five juveniles were in the car.
Sheriff's deputies were in pursuit of the vehicle before the crash.
Authorities believed the Kia Forte suspects were in was stolen, and deputies attempted to pull the car over, but the driver allegedly sped off.
Investigators said the driver lost control before crashing into the wall.
The four boys were hospitalized with moderate injuries. They are all expected to survive.