Let the exhaust cool completely
Inspect the exhaust system for cracks, holes, loose joints, and damaged gaskets
Start the engine and listen for the leak location
Feel for escaping exhaust only when the system is cool and safe
Tighten loose bolts, clamps, and flange connections
Replace damaged exhaust gaskets
Replace cracked or rusted exhaust pipes, mufflers, or manifolds
Repair small holes with exhaust repair putty or exhaust tape as a temporary fix
Replace broken hangers or mounts
Check and repair oxygen sensor threads or fittings if leaking
Clear any diagnostic trouble codes after repairs
Test drive and recheck for leaks
Have a professional inspect it if the leak is near the manifold, catalytic converter, or firewall