Buzzing Noise in Muffler or Exhaust System on Ford E-150

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.

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Average mileage: 112,000 (112,000–112,000)
Exhaust & Emissions affected: 4.6L V8, 5.4L V8
3 model years affected: 2005, 2006, 2010
5 people reported this problem
0 people shared problem details
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