Witnesses have said the car, found in Montreuil, was used by attackers at multiple locations on Friday night.
Some 19 people were killed when gunmen opened fire at a restaurant in eastern Paris, with a witness saying they fired from the back of a black Seat.
Another 89 people were killed when black-clad gunmen stormed a Paris concert hall, with police saying they had also opened fire with AK-47s.
One or more attackers also raked the terrace of a pizzeria with gunfire, with a witness saying he saw shots fired from a black car.
Automatic gunfire was also used against another restaurant and a bar. Witnesses said the attackers pulled up in a black Seat Leon car.
Image: An armed French police officer stands guard at the Franco-Italian border to check vehicles and verify the identity of travellers in Menton, France, after a series of deadly attacks in Paris on Friday. Photograph: Eric Gaillard/ Reuters