Broken pieces from catalytic converter can travel to the muffler and rattle, causing a buzzing noise to be heard in the muffler or exhaust system. The exhaust catalytic converter and muffler/pipe assemblies should be replaced.
Average mileage: 112,000 (112,000–112,000)
Exhaust & Emissions affected: 4.6L V8, 5.4L V8
5 people reported this problem