Brake booster removal and installation procedure for Smart Fortwo 454 with engine 639.939, showing interior and engine bay access points.

Service manual page with labeled photographs of brake booster location and fastening points in vehicle interior and engine compartment.

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See all Chassis figures for the Fortwo / Forfour (453), 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.