Three-way catalytic converter function schematic showing exhaust gas flow, ceramic monolith substrate, and pollutant conversion curves for rich and lean mixtures.

Catalytic converter cross-section diagram with inlet gases HC, CO, NOx and outlet products H2O, CO2, N2, plus two conversion efficiency graphs.

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See all Powertrain figures for the Fortwo (450), 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.