One appliance and crew from Beaconsfield, one from High Wycombe and one from Langley attended.
A car was well alight on the hard shoulder of the motorway when they arrived.
Thames Valley Fire Control Service received multiple calls to the incident.
The firefighters used:
- One set of breathing apparatus
- One hose reel
- A Thermal imaging camera
- Small gear
Three lanes of the motorway were closed while they worked at the scene.
Thames Valley Police also attended.