The driver of the small auto, 40-year-old AnglicareSA care worker Lucy Paveley, from Mawson Lakes, was killed on impact while driving to work.
A 40 year old Mawson Lakes woman was left for dead after her Nissan Micra was hit by a stolen Pajero that ran a red-light at the Kings Rd/Main North Rd intersection just after 6.30am.
SA Police said a man aged 18, two boys aged 15, one aged 14 and another aged 13 had now been charged with manslaughter.
All four were charged with manslaughter and all five youths are expected to appear in the Adelaide Youth Court today.
On Sunday afternoon police arrested an 18-year-old man and a 17-year-old boy from Paralowie, and a 17-year-old boy from Davoren Park.
Superintendent Anthony Fioravanti said eyewitnesses reported that three males from a white Mitsubishi Pajero fled the crash scene and jumped into another stolen auto, a black Mazda 3, which then drove off.
"It's totally unbelievable and disgraceful how they crashed into this auto at high speed, jumped into another vehicle and left the [victim] there in the vehicle".
Police say they're close to identifying the suspects.
Police believed the fatal crash followed a series of a break-ins by those involved, with the Pajero being stolen from a house in Grange. It is believed she was on her way to an early morning shift at an unspecified workplace, travelling north on North Main Road.
The 4WD was reportedly pursued by police on Saturday night before the police called off the chase shortly before the collision.
Police said a Commissioner's Inquiry had also been established to investigate police involvement in the incident, with a patrol engaged in a brief pursuit of the second vehicle before the crash.
Three teenagers arrested on Sunday were released without charge.