Volume air flow meter removal and installation procedure for chassis 454 engine 639.939, showing clamp, hose, housing, sealing ring, screw, and hot film mass air flow sensor.

Exploded diagram of air intake components with numbered callouts and step-by-step service procedure table.

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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.