The Lexus CT200h 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 2011 through 2017 model years and documents the corresponding bulb size specifications for turn signal applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The rear turn signal position on the Lexus CT200h uses the 7440NA bulb across all model years from 2011-2017, making it the most consistent fitment in these specifications.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, designed to serve one lighting function per socket.
The front turn signal position uses either the 7443NA or 7444NA depending on the model year, both of which are dual-filament T20 wedge bulbs rated at 12V with a 21W/5W filament configuration.
The dual-filament rating of 21W/5W on the 7443NA and 7444NA means the bulb operates one filament for the higher-intensity turn signal function and a second filament for a lower-intensity parking or running light function.
The 7443NA fits the front turn signal on the CT200h for model years 2011-2012, 2014-2015, and 2017.
The 7444NA fits the front turn signal on the CT200h for model years 2013 and 2016.
Although the 7443NA and 7444NA share the same T20 wedge base type and identical voltage and wattage ratings, they are listed as distinct part numbers and are not confirmed as interchangeable within these specifications.
All three bulb types, the 7440NA, 7443NA, and 7444NA, carry the NA suffix, which denotes natural amber glass rather than a clear envelope with an amber-coated or separate lens, meeting ANSI standards for the US and Canadian markets.
The T20 wedge base is a common automotive base format, though the single-filament 7440NA and dual-filament 7443NA/7444NA variants use physically different base configurations to prevent incorrect installation across positions.