One appliance and crew from Beaconsfield, one from Gerrards Cross and one from High Wycombe attended, along with one officer.
The car was located just after the Junction 3 slip road.
The firefighters used:
- One set of breathing apparatus
- One hose reel
- One dry powder extinguisher
Lanes one and two of the northbound carriageway was closed while they worked at the scene.