The Lexus GS350 parking light utilizes bulb sizes 168, 7443NA, and 7444NA depending on the specific version of the vehicle. Data for the lighting components covers the range from 2007 to 2019.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The front parking light specifications for the Lexus GS350 cover model years 2007-2019 and reference three distinct bulb sizes: 7444NA, 7443NA, and 168.
The 7444NA and 7443NA are both dual-filament T20 wedge bulbs rated at 12V with a 21W/5W output, constructed with natural amber glass, and classified under the ANSI standard for the US and Canadian markets.
The natural amber glass construction of the 7444NA and 7443NA produces an amber-tinted output without the use of a painted or coated lens, which is the characteristic indicated by the "NA" suffix in both part numbers.
The 7444NA and 7443NA share identical voltage and wattage ratings, as well as the same T20 wedge form factor and natural amber glass construction, yet they carry different ANSI designations and are not listed interchangeably across all model years.
For the 2017-2019 GS350 equipped with LED headlamps, the specified front parking light bulb is the 7444NA, while the 7443NA is specified for 2016-2018 models equipped with the two-headlamp configuration.
The 2018 GS350 is the only model year in the specifications where both the 7444NA and 7443NA are listed simultaneously, each tied to a different headlamp configuration, indicating that headlamp type is a critical fitment variable for that year.
The 168 is a single-filament T10 miniature wedge bulb rated at 12V and 4.9W, also conforming to the ANSI standard for US and Canadian markets, and it is a significantly lower-wattage bulb than the T20 types used in later model years.
The 168 bulb is specified for the GS350 across the 2007-2011 model years, representing the earlier generation of the vehicle before the transition to the higher-wattage T20 wedge types.
The T10 and T20 designations refer to the bulb's tubular body width, with T10 indicating a width of approximately 10mm and T20 indicating approximately 20mm, making the two form factors physically incompatible with each other's sockets.
The 7443NA is specified for the 2013-2016 GS350 in standard or two-headlamp configurations, while the 7444NA appears for the 2013 model year as well as the 2017-2019 range, reflecting a recurring use of both T20 variants across the model's history.