A college student killed in a Tesla Cybertruck crash was trapped inside the vehicle as it burst into flames due to a design flaw involving its doors, a lawsuit has claimed.

Krysta Michelle Tsukahara, 19, was one of three who died when the vehicle smashed into a tree at high speed in Piedmont, California, last November.

Her parents have now launched legal action, alleging that Tesla, led by Elon Musk, knew about the design flaw for years but failed to fix it.

Krysta, a second-year student at Savannah College of Art and Design, along with friends Soren Dixon, 19, who was driving, and Jack Nelson, 20, were all killed in the crash after the vehicle caught fire.

A fourth passenger was injured but survived.