I hear a rattling noise when im idling and when i press on the gas. I was told it was the heat shield. I have a 2005 dodge neon. I wanted to know how the heat shield was held on. and can it be fixed?

There's alot of shields on those. I've seen the ones bolted to the floor area, along the exhaust tunnel, to rot out. Not the ones bolted to the cat converter, for the most part. Very hard to replace without removing the exhaust first. Then the bolts usually snap or round off, requiring grinding & drilling to replace the bolts. Pain in the **** for anyone. Even me, a Master Tech.