Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Exhaust System: Notes
The 2.5L exhaust system consists of:
- a one-piece catalytic converter manifold (hybrid only).
- an exhaust manifold (except hybrid).
- an exhaust flexible pipe.
- an underbody catalytic converter.
- a Catalyst Monitor Sensor (CMS) mounted to the underbody catalytic converter.
- a production muffler and tail pipe assembly.
- isolators installed on the body and muffler hangers.
The 3.0L exhaust system consists of:
- a one-piece catalytic converter manifold.
- a RH exhaust manifold-mounted catalytic converter.
- an exhaust flexible pipe.
- an underbody catalytic converter.
- a production muffler and tail pipe assembly.
- isolators installed on the body and muffler hangers.
The 3.5L exhaust system consists of:
- two exhaust manifold-mounted catalytic converters.
- an exhaust Y-pipe.
- a resonator and flex assembly.
- a production muffler and tail pipe assembly.
- isolators installed on the body and muffler hangers.
The exhaust system provides an exit for exhaust gases and reduces engine noise by passing exhaust gases through the catalytic converters, a muffler assembly and resonator. Rubber exhaust hanger isolators attach the exhaust system to the hangers welded on the body.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.