Iridium spark plugs are the best plug made. many auto technicians do not like Bosch Platinum or the four prong Bosch plugs in Asian cars. The spark plugs you have if they are the right application for your car are the best and should not require changing as frequently as a standard plug.
RepairPal Certified shops can diagnose and repair your 2006 Nissan Sentra. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.