The Lexus IS200t uses 7443NA and 7444NA bulbs for front turn signals and 7440NA bulbs for rear turn signals, with each size representing a distinct bulb configuration. The replacement chart covers 2016 to 2017 model years and documents the corresponding bulb specifications for both front and rear turn signal positions.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus IS200t front turn signal uses different bulb sizes across its two model years, with the 2016 requiring a 7444NA and the 2017 requiring a 7443NA.
The 7443NA and 7444NA are both dual-filament T20 wedge bulbs rated at 12V with a 21W/5W power draw, meaning the higher wattage filament handles the turn signal function while the lower wattage filament serves a secondary role.
Despite their near-identical specifications, the 7443NA and 7444NA are listed as distinct part numbers and are not interchangeable across the 2016 and 2017 front turn signal positions.
Both the 7443NA and 7444NA carry natural amber glass, which produces the amber turn signal color directly from the bulb rather than relying on a colored lens.
The rear turn signal on the Lexus IS200t uses the 7440NA for both 2016-2017, making it the only position with consistent fitment across both model years.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, distinguishing it from the dual-filament units used at the front.
All three bulb types in these specifications conform to ANSI standards applicable in the United States and Canada.
The T20 wedge base is shared across all bulbs listed, though the single-filament and dual-filament variants within that base type are not interchangeable due to differences in filament count and pin configuration.