Secondary air injection system components and operation on Engine 132, including pump, valve, and cylinder head ports.

Engine diagram showing secondary air injection pump M33, switchover valve Y32, hoses, and cylinder head with numbered callouts.

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See all Powertrain 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.