Checking oil pressure on 454 model engines 122.9, 134.9, 135.9, 639.9 with pressure switch location and testing device setup.

Engine diagram showing oil pressure switch S41/1 location and pressure testing device with callout steps for checking oil pressure.

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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.