Borg-Warner synchronization component description for 451.3 transmission with numbered callouts showing synchronizer ring, shift collar, and locking splines.

Technical diagram of transmission synchronizer assembly with four numbered component callouts.

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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.