The Toyota C-HR back up light requires a 921 bulb size for proper installation and function within the rear lighting assembly. Data for the specific component covers the period from 2018 through 2022.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 921 bulb is the sole bulb size specified across all listed back up light positions on the Toyota C-HR, covering both the standard back up light and the inner back up light.
The 921 bulb follows the ANSI standard recognized in the United States and Canada, placing it within a defined regulatory framework for automotive lighting in those markets.
This bulb uses a wedge-style base, designated T15, which refers to a tubular glass envelope approximately 15 eighths of an inch wide. The wedge base design relies on the bulb's own glass pinch to make electrical contact, requiring no separate metal socket pins.
The 921 operates at 12 volts and 16 watts, consistent with standard 12-volt automotive electrical systems. At 16 watts, it falls within the typical power range for reverse lighting applications.
The standard back up light position on the Toyota C-HR uses the 921 bulb across the 2018-2022 model years.
The inner back up light position, a separate fitment from the standard back up light, also uses the 921 bulb for the 2018-2019 model years.
Although both positions share the same 921 bulb size, the inner back up light is a distinct assembly and the two positions are not interchangeable as installed units, even though the bulb specification is identical.