Toyota Yaris front side marker bulb size is 168 and rear side marker bulb size is 7443. Replacement chart covers 2013 to 2019 vehicle production years with bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Toyota Yaris front side marker position uses the 168 bulb across the 2013-2014 and 2018 model years listed in these specifications.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, conforming to ANSI standards for the US and Canadian markets.
The rear side marker position across the 2013-2014, 2018, and 2019 Toyota Yaris model years listed uses the 7443 bulb.
The 7443 is a T20 dual-filament wedge bulb rated at 12V with a 21W main filament and a 5W secondary filament, also conforming to ANSI standards for the US and Canadian markets.
The dual-filament design of the 7443 means it supports two separate brightness levels within a single bulb, which is a characteristic relevant to rear marker and signal functions.
The front and rear side marker positions on the Toyota Yaris use different bulb families, T10 at the front and T20 at the rear, making the two positions non-interchangeable despite both using wedge-base construction.
The wattage difference between the 168 (4.9W) and the 7443 (21W/5W) reflects a significant gap in power draw, and substituting one for the other would not conform to the factory specification for either position.