Remove/install bass module speaker (subwoofer H4/29) in chassis 454 with C22 sound package, showing left front seat area and subwoofer location.

Service procedure for removing and installing subwoofer in Smart Fortwo 454 with numbered callouts showing removal steps and parts location.

View full-size image ↗

See all Electrical 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.