Sound Insulators and Shields
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Sound insulators and shields attached to the underbody protect the vehicle from exhaust system heat and should be inspected at regular intervals to make sure they are not dented or out of position. If a sound insulator or shield is damaged or shows evidence of deterioration, a new sound insulator or shield should be installed. The sound insulators and shields for the muffler assembly and exhaust Y-pipe dual catalytic converter are installed separately.