The crash occurred near the intersection of Belloc Close and Vidal Street in Wetherill Park just before 8pm on Monday.

Residents phoned triple zero to report hearing a series of loud bangs, before finding the maroon Toyota Corolla resting on its roof in the street.

Wetherill Park: Teen killed in crash at intersection of Belloc Close and Vidal St. https://t.co/X2DeEx7REG #7News https://t.co/G2oWf9MjRl— 7 News Sydney (@7NewsSydney) May 30, 2016

The 17-year-old girl, who police believe was driving, was trapped inside the wreckage, while two other passengers - another 17-year-old girl, and a 14-year-old boy - were able to get out.

NSW Ambulance paramedics arrived within minutes but could not save the girl, who died at the scene. She is believed to have suffered major head injuries.

The boy was taken to hospital with minor injuries, while the other girl was not injured, police said. They have both spoken to police.

A NSW Police spokesman said the Toyota may have been travelling with another vehicle in the moments before the crash. Initial police investigations suggested the cars were not street racing, a police spokesman said.

Police set up a crime scene on Monday night, and are appealing for anyone who saw the Toyota in the lead-up to the crash to contact Crime Stoppers on 1800 333 000.

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