Anti-theft alarm system and Drive Authorization System component locations and part numbers for 451.3/4 chassis models.

System component overview table and vehicle diagram showing transmitter key, interior protection, alarm horn, transponder coil, SAM control unit, and cockpit switch locations.

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See all Electrical 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.