Exhaust system overview for smart fortwo 451 showing manifold, catalytic converter, and main muffler with oxygen sensors.

Labeled diagram of exhaust system components including manifold, converter, muffler, and sensor locations.

View full-size image ↗

See all Powertrain figures for the Fortwo (451), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.