Brake system overview showing vacuum pump, sensors, and relay locations on smart fortwo 451 electric drive.

Diagram of brake system components including B64/2 and B64/3 sensors, M57 vacuum pump, K109 relay on smart fortwo.

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See all Chassis 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.