How can i repair a rattling toyota matrix rear muffler heat shield?

The Toyota Matrix is known for losing heat shields over time through wear, vibration or corrosion. The part is generally held on by a series of plastic clips and can be replaced by a mechanically minded owner for less than $50 in parts. Takeng the Matrix to an auto service or muffler center might increase those costs to $100-$150 in parts and labor. If the heat shield above the Matrix' muffler has fallen off, it's important to replace it as soon as possible. The shield protects the rear hatchback's carpeting from excessive temperatures and hot exhaust gasses that could cause combustion. Most exhaust parts wear out due to rust or loose fasteners, so if the vehicle's shield is still in place but rattling, consider re-securing it with stainless clamps, ties, bolts or welding.