Hobbies and Crafts How do I shampoo my car interior? How much does it cost to get a car seat cleaner? Steam cleaning of the interior or carpet shampoo could cost $75 or more and cleaning of leather upholstery averages around $50. You may also find services for dent removal, engine cleaning or wheel detailing at some car detailing shops. Related Posts:The Home DepotCarpet Installation Cost Calculator can be used to calculate the cost to install carpet.How much does a new carpet cost per sq ft?Can you turn off self cleaning on your oven early?How does dry foam carpet cleaning work?