O2 sensor upstream of catalytic converter component identification and removal procedure for Smart 450/451/452/454.

Identifying O2 sensor components and removal steps with multiple vehicle views and callout diagrams.

View full-size image ↗

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.