I am planning to install heated seats for my wife 2003 corolla for Chicago winter weather. The brand is Rostra and the price is around $150. After seeing some videos on Youtube, the most time consuming is the car upholstery. I want to know if the 2003 corolla use hog rings for the seat. My car seat is manual so I don't have to worry about airbag. I am also planning to use add a fuses to both car seats. Currently the car has Autopage remote starter and front and rear dash camera. These two are running on ACC. Hopefully I don't have to upgrade to a higher amperage alternator. Has anybody has experience with car upholstery. Thank you, your help is greatly appreciated.