AUS Injection MP-10171 Remanufactured Fuel Injector - 1991-1992 Nissan Sentra With 1.6L Engine Remanufactured In the USA All units are 100% factory tested before packaging Clean injectors provide better gas milage and increase overall performance All injectors are lubricated prior to packaging ensuring a trouble free installation All injectors are backed by a 12 month 12,000 mile warranty