Warning: Refer to Hot Exhaust System Warning in the Preface section.

DEFINITION: An audible or physical noise due to a faulty component or damaged components causing a loose or misaligned exhaust system resulting in a rattle or vibration noise (buzz, groan, hum).

Popping or hissing noise

Exhaust leak. Refer to Exhaust Leakage.

Loud exhaust

1. Compare to a known good vehicle.
2. Inspect for a damaged or failed muffler.
3. Replace the faulty muffler. Refer to Exhaust Muffler Replacement.

External rattle or vibration noise

1. Inspect for a bent or loose hanger, loose heat shield, or loose clamp.
2. Inspect for a exhaust pipe causing interference.
3. Repair or replace the affected component.
4. Refer to the affected component service procedure.

Internal rattle

1. Test the components by tapping with a rubber mallet to confirm a rattle.
2. Replace the faulty catalytic converter or muffler. Refer to the following procedures:

•	Catalytic Converter Replacement

•	Exhaust Muffler Replacement