Transmission motors M17/3 and M17/4 selector drums on automated manual transmission housing, Model 451.

Exploded view of two transmission motors with selector drums labeled M17/3 and M17/4 on transmission assembly.

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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.