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

Engine diagram showing secondary air injection pump M33, switchover valve Y32, combination valve, air hose, and vacuum hose with callouts 1-4.

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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.