Remove/install balancing shaft procedure for Smart 454 model with 639.939 engine, showing numbered components and step-by-step service sequence.

Engine balancing shaft removal and installation guide with annotated callouts and procedural steps.

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See all Powertrain 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.