Teen Uber passenger dead, three fighting for life after horror crash

A teenager has died and three people are fighting for their lives after an Easter weekend crash in Sydney's south west.

More than a dozen people were injured when the car smashed into seven other vehicles, and then burst into flames.

The horrific scene shocked onlookers and veteran first responders.

Witnesses rushed to help emergency services treat the 14 wounded, but despite their efforts, 17-year-old Blake Feeney couldn't be saved.

Mr Feeney was sharing an Uber with friends Mark Johan, Mark's brother and his girlfriend. The trio all remain in a critical condition in hospital, fighting for their lives.

Remarkably the driver of the ride share escaped with minor injuries.

Among the wounded was a 26-year-old who is expected to be charged over the incident.

Inspector Stuart Smith, NSW Ambulance described the incident as "difficult."

"[It was] very sad and distressing for emergency crews on the scene. Especially given the time of year that it is as well."

Traffic And Highway Patrol Command Assistant Commissioner Michael Corboy agreed.

“In the end there could have been a lot more people killed, it could have been the scene of utter devastation,” he said.