Took my car in for a rattling noise i started hearing 3-4 days after my last service. Not sure if they caused it or i caused it. It was a metal to metal rattling noise coming from underneath the dashboard area, i even had to take a toyota mech for a ride. He heard it after going up a hill at 30mph, that was enough to confirm the video i took of the sound i heard. Come to find out it was a heat shield, no cost to me. Ftw.