Belt drive system with eight labeled components: alternator pulley, poly-V belt, coolant pump pulley, refrigerant compressor pulley, crankshaft pulley, tensioning device, tensioning device belt, and stretch belt.

Engine block front view showing belt drive pulleys and tensioning components with numbered callouts 1-8.

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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.