Exhaust
Exhaust System
The exhaust system carries burnt gases away, reduces noise and cleans emissions.
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Exhaust flow
Interactive — tap a partTap a part to see how it fits in the system.
What it does
- Routes exhaust gases from the engine to the rear
- Mufflers reduce noise
- The catalyst cleans harmful gases
- O2 sensors monitor the mixture
When it fails
- Loud or rumbling exhaust
- Rattling from under the car
- Check engine light (O2 or catalyst codes)
- Exhaust smell in the cabin
How to diagnose
- Listen for leaks with the engine running
- Check for soot at joints and gaskets
- Read O2 and catalyst codes
- Check hangers for broken rubbers
Maintenance
- Fix leaks before they damage the catalyst
- Replace rusted sections promptly
- Use the correct gaskets and torque
Use the diagnosis order. When a part fails, confirm each hypothesis with measurements before replacing anything — codes and symptoms overlap.
Related part
Catalytic Converter
The catalytic converter turns harmful exhaust gases into less harmful ones.