Toyota Yaris iA Daytime Running Light Bulb Size

The Toyota Yaris iA daytime running light requires a 9003 bulb size for the lighting system. Data for the specified vehicle covers the range from 2017 to 2018.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2017-2018	9003	H4	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament halogen bulb with P43t base. 12V, 60W/55W.	9003	Check Price

Other Locations

Additional Notes

The 9003 is a dual-filament halogen bulb operating at 12 volts with a 60W high-beam filament and a 55W low-beam filament. It uses a P43t base and is designated under the ANSI standard applicable in the United States and Canada.
The Toyota Yaris iA uses the 9003 bulb size for the daytime running light position across the 2017-2018 model years.
The P43t base is a three-tab bayonet-style mount. Its tab spacing is specific to this base type, meaning bulbs with different base configurations are not physically interchangeable even if their voltage and wattage ratings are similar.
The dual-filament design of the 9003 means a single bulb serves two distinct lighting functions through separate filaments. A failure in one filament does not necessarily disable the other, though the bulb housing itself must still be replaced as a unit.