No. Foam extinguishers are only efficient against type A fires but fail against type B fires. On the contrary, sometimes, they can even elevate the spread of type B fires. So, it is not recommended to use them in your car. Besides that, you should also not carry a water-type or CO2-type fire extinguisher in your car. The first one is ineffective against class B and C fires, and the CO2 ones fail against Class A fires.