Lexus RC F front turn signal bulbs use 7440NA, 7444NA, or 7443NA sizes, while rear turn signal bulbs use 7440NA size. The replacement bulb chart covers 2015 through 2024 production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The three bulb types specified for the Lexus RC F turn signals, the 7440NA, 7444NA, and 7443NA, all belong to the T20 wedge family and share the same ANSI standard classification for the US and Canadian markets.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, while the 7444NA and 7443NA are dual-filament variants rated at 12V with a 21W primary filament and a 5W secondary filament.
The natural amber glass construction of all three bulb types produces the amber turn signal color directly through the glass envelope rather than through a colored lens or coating.
The 7440NA is the most widely used type across these specifications, appearing in the front turn signal positions for 2021-2022 and in the rear turn signal positions across nearly all listed model years.
The front turn signal on the Lexus RC F shifted from dual-filament bulbs to the single-filament 7440NA between the 2019 and 2021 model years, reflecting a change in the wattage demands of that position.
The 7443NA and 7444NA are both dual-filament T20 bulbs with identical wattage ratings of 21W/5W, though they carry different ANSI part numbers and are not confirmed as interchangeable within these specifications.
The 2019 front turn signal position is the only application in these specifications calling for the 7444NA, distinguishing it from the 7443NA used in the 2015-2018 front positions.
The rear turn signal position for the RC F uses the single-filament 7440NA exclusively across all listed model years, indicating that position requires only one active filament for its turn signal function.