A car seat is an item forming part of a vehicle, and can be found in three different sizes, standard, big and sports.
Car seats are fitted into a vehicle to provide a place for players to sit or as extra storage space. Seats can be removed from a vehicle and still be driven, so long as the driver's seat is left in, this can greatly reduce the vehicle's weight, increasing mileage and speed. However, removing seats can put the player in a dangerous situation if the vehicle gets surrounded by zombies, as removing seats also removes the ability to enter or exit via that door.
Each vehicle has a set number of maximum seats they can have.