I posted last week about the heat shield above my muffler becoming loose. Today it fell off my car completely (I saw it in my rear view mirror). Do I need to get a new one? Its purpose is to keep the right side of the trunk from getting too hot since it sits right above the muffler. If I don't use my trunk for any perishables, can I just leave it alone or is there a chance something might melt due to excessive heat? Costs about $50 at the dealer and I'll have to figure out how to mount it myself because the holes for the mounting bolts rusted off the bottom of the cargo bed. Now I have a 1/2" hole which is much larger than the OEM mounting bolt.