THIS LISTING IS FOR A GEO TRACKER SUZUKI SIDEKICKM MAP SENSOR 18590-80C00. I WAS INTO THE TRACKERS AND SIDEKICKS 10-15 YEARS AGO AND HAD HUNG ONTO IT FOR A BACK UP. I PUT UNTESTED BECAUSE I DON'T REMEMBER THE TRACKER I REMOVED IT FROM BUT KNOW IT WAS 89-94. SHIPPING IS $6. TO ANYWHERE IN THE LOWER 48.