Thermostat design and coolant fan motor function for 451.3/4 engine; identifies M42 fan motor location at radiator rear.

Thermostat component diagram and coolant fan motor with smart fortwo vehicle locator image.

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See all Powertrain figures for the Fortwo (450), 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.