The Lexus ES300h front turn signal uses 7440NA, 7444NA, or 7443NA bulb sizes, while the rear turn signal requires a 7440NA size for replacement. The chart covers 2013 through 2024 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The front turn signal specifications for the Lexus ES300h span 2013-2024 and reference three distinct bulb types: 7440NA, 7444NA, and 7443NA, all of which share the T20 wedge form factor and natural amber glass construction.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, while the 7444NA and 7443NA are both dual-filament T20 wedge bulbs rated at 12V with a 21W primary filament and a 5W secondary filament.
Despite their shared T20 housing and identical voltage and wattage ratings, the 7440NA is not interchangeable with the 7444NA or 7443NA in applications that require dual-filament operation, as the 7440NA carries only a single filament.
The 7443NA and 7444NA share the same electrical ratings of 12V and 21W/5W and both use the T20 wedge base with natural amber glass, though they carry different ANSI designations and are listed under separate model years in the front turn signal position.
The front turn signal position for the 2019-2020 Lexus ES300h specifies the 7444NA bulb specifically for vehicles equipped with LED headlamps, indicating a trim-level or package dependency for that fitment.
The rear turn signal position across 2013-2018 uses exclusively the 7440NA, a single-filament bulb, which differs from the dual-filament types listed for the front turn signal during overlapping model years.
All three bulb types across both positions conform to ANSI standards applicable in the United States and Canada, and all use the natural amber glass envelope rather than a clear bulb with an amber-coated socket or housing.
The natural amber glass construction of the NA-suffix bulbs produces amber light directly from the envelope, which is a design distinction from clear bulbs that rely on an external amber lens to produce the required turn signal color.