Schoolboy Amar Atwal, aged 12, died two days after the crash on Hollyhedge Road, West Bromwich, which happened on Wednesday.
Two of his relatives, a 44-year-old woman and a 12-year-old boy, were also hurt and remain in hospital.
Amar, a young footballer from Great Barr who played for Willenhall-based Sporting Khalsa FC, died after being thrown from the Mitsubishi Outlander, which ended up on its roof after the collision with a Vauxhall Astra.
Officials at Sporting Khalsa said they were devastated after learning of Amar's death.
The club tweeted: "Devastating news to hear that one of our youth players died yesterday. #amaratwal God bless your soul."
An investigation into the crash is continuing.