"Police are appealing to the driver of the vehicle, or anyone who knows who the driver is, to come forward.
"Police are also asking for any family members, mechanics, panel beaters or handyperson who has been asked to fix a vehicle which could have been involved in a crash overnight, or if the driver appears suspicious, to come forward."
Grieving family members gathered at the scene to place flowers today.
A family member told Fairfax the teen was an "awesome guy, full of life".
• If you know anything about this please phone Waitakere Police on 09 837 9511 or anonymous tip line Crimestoppers on 0800 555 111.