One fire appliance from Taunton attended a car on fire in Obridge Close in Taunton at 04:43 this morning (Sunday).
Crews arrived and extinguished the blaze using one hose reel jet with two breathing apparatus wearers.
The fire service say the fire was set alight deliberately and the police were informed.
The vehicle was severely damaged.
Crews also dealt with various other small fires in the same area involving trees and hedges which are believed to be the same arsonist.
A second fire appliance from Taunton was sent to assist.