The Lexus RC300 parking light requires a 7443NA bulb size for proper installation and function within the lighting assembly. Data for the specified component covers the range from 2016 to 2018.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7444NA and 7443NA are both ANSI-standardized bulb types recognized in the United States and Canada, sharing the same T20 wedge form factor, natural amber glass construction, and 12V, 21W/5W dual-filament electrical ratings.
The dual-filament design of both bulb types means each bulb contains two separate filaments operating at different wattages, with the 21W filament typically serving a brighter function and the 5W filament serving a lower-intensity function such as parking or running light duty.
Natural amber glass in both bulb types produces an amber-colored output directly from the glass envelope rather than relying on a colored lens or coating, which is a common method of meeting amber signal light requirements without additional optical components.
The Lexus RC300 front parking light position accepts the 7444NA for the 2017-2019 model years.
The 7443NA applies to the RC300 front parking light position for the 2016-2018 model years, meaning the 2017 and 2018 model years list both the 7444NA and 7443NA as specified sizes for this position.
Although the 7444NA and 7443NA share identical voltage, wattage, glass type, and base style, they are distinct ANSI part numbers and are not confirmed as interchangeable within these specifications.