The Lexus GS460 high beam headlight uses a 9005 bulb size while the low beam headlight requires a D4S bulb size. The replacement chart covers vehicle production spanning 2008 to 2011 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus GS460 uses two distinct bulb types across its headlight system: the 9005 for high beam and the D4S for low beam, covering the 2008-2011 model years for both positions.
The 9005 is a single-filament halogen bulb rated at 12V and 65W, built to the ANSI standard applicable in the United States and Canada, and fitted with a P20d base.
The D4S is a mercury-free HID xenon discharge bulb rated at 42V and 35W, conforming to the ECE standard used in Europe and worldwide markets, and fitted with a P32d-5 base.
The elevated operating voltage of the D4S, at 42V, reflects the nature of HID discharge technology, which requires high-voltage ignition and a dedicated ballast circuit rather than a direct connection to a standard 12V automotive supply.
The D4S is specified for projector-type housings, meaning the low beam assembly on the GS460 uses a projector lens design to control and focus the HID output.
The P20d base of the 9005 and the P32d-5 base of the D4S are physically incompatible with each other, and neither bulb is interchangeable with the other's socket position.
The 9005 base designation P20d is shared with several other halogen bulb types, though wattage and filament configuration differences among those types can affect fitment suitability even when the base physically fits a socket.