.This High Quality Speed Sensor 1918305 191-8305 matches 3606, 3608, 3612 and C15 engines flawlessly.It accurately reads instant rotational speed data and outputs steady electrical signals to keep engines operating properly. Built with premium internal hardware and heavy-duty sealed housing, this sensor runs consistently even in intense high-temperature work environments. Manufactured following rigorous OEM standards, it offers great mounting compatibility, quick signal reaction and prolonged service life for regular engine servicing.