And several were on bail on a string of serious charges.
A girl, 17, injured when the luxury SUV crashed into a median pole remained in a serious but stable condition in The Alfred hospital on Friday night.
Police confirmed all those in the car, stolen in a burglary at Truganina, were minors.
Police arrested six teenagers including the girl, who suffered head injuries, at the scene. Those arrested were on Friday night assisting police.
Three others fled but police were confident they would be identified.
The Herald Sun has been told one of the boys is believed to have associations to Apex and was charged with affray after March’s Moomba riot.
He was on bail after pleading guilty to offences including aggravated burglary — a charge frequently faced by members of youth gangs.
Another aboard the SUV is suspected of being linked to a carjacking in the western suburbs on Wednesday morning.
The Herald Sun understands he is on several sets of bail for other offences, including armed robberies.
He is also suspected of involvement in robbing people in inner Melbourne of their mobile phones.
Friday’s crash occurred on the outbound side of the bridge, about 2am.
Dashboard camera vision from another driver captured the aftermath of the crash.
The BMW was severely damaged; one of its rear wheels was mangled and its airbags had been deployed.
The vehicle’s keys were stolen during a burglary on a property in Alison St, Truganina, between 12.30pm and 1.30pm on Thursday.
A phone, and wallet were also taken during the burglary.
Nobody was at home at the time.
Investigators urge anyone who may have witnessed the West Gate crash or who may have information to contact Crime Stoppers on 1800 333 000 or submit a confidential report at crimestoppersvic.com.au