The blaze happened on the westbound carriageway between Junction 3 for Tong and Junction 4 for Shifnal.
A Shropshire Fire and Rescue Service spokesman said: "At 3.14pm on Wednesday, February 1, SFRS Fire Control received a call reporting a fire classified as car fire in Telford. Fire out on arrival.
"Three fire appliances were mobilised from Albrighton, Telford Central and Wellington. An operations officer was in attendance."