Done!!! Took him about 20 minutes. He had the right tools and knew what he was doing. He arrived driving an old Merc 300D. He said it gave him good mileage while carrying all the heavy tools he had in the car. My car runs great. It even got rid of the little miss and hesitation that had developed. 12 month 24,000 mi warranty incl. Total price using my sensor was $83.