Absolutely! Pet Loader dog stairs can be used in sedan cars, with the platform resting on the seat. Measure the height from the pavement to the backseat to find the extention height needed. Also measure the door opening, as a platform width of 18″ may be too wide, in which case the 14.5″ or 12″ platform width will be required. The 12″ Mini Pet Loader will fit ALL side entry vehicle doors. The 14.5″ Pet Loader will fit most side door vehicles, call our customer service for further information 877-275-4870.