One appliance and crew from Northamptonshire, one from Broughton and one from Newport Pagnell attended, along with an officer.
One car, located in the refuge area approaching the motorway Services, was well alight when they arrived.
They fended off the refuge area and lane one of the motorway.
The firefighters used two sets of breathing apparatus and one hose reel jet.
The car was destroyed by the fire. The fire had also spread to affect an emergency call phone within the refuge area.
National Highways and Thames Valley Police also attended.
