The Lexus NX200t back up light requires a bulb size of 921 for the specific lighting component located at the rear of the vehicle. Data for the bulb size covers the range from 2015 to 2017.
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 listed across all back up light positions for the Lexus NX200t, covering model years 2015-2017.
The 921 is an ANSI-standardized bulb, meaning it conforms to a defined performance and dimensional specification recognized across the United States and Canada.
The 921 uses a wedge-style base, designated T15, which refers to a tubular bulb body approximately 15 eighths of an inch wide that is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive low-voltage electrical systems.
Both the outer back up light and the inner back up light positions on the 2015-2017 NX200t share the same 921 bulb specification, indicating no distinction in bulb type between those two assemblies.
Because the 921 follows an ANSI standard, it is interchangeable with other bulbs that carry the same ANSI designation, provided voltage and wattage ratings are also matched.
The T15 wedge base format is a common fitment in reverse and backup lighting applications across many vehicle platforms, though socket compatibility should still be confirmed against the specific housing design of the NX200t.