The Scion iQ brake light utilizes a 7443 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb specifications covers the range from 2012 to 2015.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7443 is the sole bulb size specified across all brake lighting positions for the Scion iQ, covering the 2012-2015 model years.
The 7443 is an ANSI-standard dual-filament wedge bulb classified under the T20 form factor, operating at 12 volts with a wattage rating of 21W on the high filament and 5W on the low filament.
The dual-filament design of the 7443 allows a single bulb to serve two distinct brightness levels, which is typical in brake and tail light applications where the lower filament handles running light duty and the higher filament activates under braking.
The 7443 designation follows ANSI standardization, meaning the specification applies uniformly across the United States and Canada.
The Scion iQ (2013) outer brake position carries a production date qualifier, specifying the 7443 for vehicles built from September 2012 onward.
The 2015 outer brake position on the Scion iQ is similarly date-restricted, with the 7443 specified only for vehicles produced up to June 2015.
The date qualifiers on the 2013 and 2015 outer brake entries indicate that production changes occurred mid-year, and fitment should be confirmed against the vehicle's build date rather than model year alone.