Exhaust Popping/Snapping Noise When Vehicle is Hot, at Idle, or Immediately After Vehicle is Shut Off (Replace Straps on Muffler Heat Shield)

This bulletin is being revised to add the 2008 model year and include additional models. Please discard Corporate Bulletin Number 07-06-05-001 (Section 06 -- Engine/Propulsion System).

Some customers may comment on a popping/snapping noise from underneath the vehicle at idle or immediately after the vehicle is shut off. Some popping/snapping noise from the exhaust system during cool down is a normal condition.

The noise may be intermittent depending on the outside temperature and or temperature of the exhaust system at the time of testing.

As the exhaust system warms and cools, the muffler and the muffler heat shield expand and contract at different rates. Some popping/snapping noise from the exhaust system during cool down is a normal condition.

The straps currently used to hold the exhaust shield in place may not be crimped tight enough to stop the muffler heat shield from moving.

DO NOT REPLACE THE EXHAUST SYSTEM COMPONENTS.

1. Install three straps, P/N 10391259, so that the strap screw head will be located on top of the muffler.

Tighten
tighten the strap screw to 4 N·m (35 lb in).

2. Cut off the excess strap material and bend the strap over the strap screw head.

For vehicles repaired under warranty, use: