Replacement of seat upholstery requires removal of seats from car, disassembly of seat mechanism and removal of old upholstery. Components serviceability can and should then be determined, padding may have to be repaired or replaced, springs may need repair. Different seats require different methods of installation, gluing, hog rings or integral clips or combination of several methods may be involved. Usually installation of complex seat upholstery is best left to professionals. It can be very difficult to tell the difference between leather and vinyl by looking at the face of the material.
Manufacturers intentionally make vinyls to look like leather.
By turning the material over however the difference is obvious. Vinyl will have a knitted back with a regular pattern, while leather will appear to be suede. Q. My seats Sag, Feel Lumpy or the Springs are Sticking Through. Most automobile seats are comprised of 3 major components. Steel frame or spring assembly.