The Lexus RX300 headlight bulb size specifications include 9005 and 9006 options for high beam applications, with 9006 and D2R sizes available for low beam functions. The replacement chart covers 1999 to 2003 model years and documents bulb size data across the vehicle production range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9005 bulb is an ANSI-standard single-filament halogen type rated at 12V and 65W, fitted with a P20d base. It serves as the high beam headlight across all Lexus RX300 model years covered in these specifications, spanning 1999-2003.
The 9006 bulb is also an ANSI-standard single-filament halogen type, rated at 12V and 55W with a P22d base. It draws 10 watts less than the 9005 and is the predominant low beam bulb across the RX300 range.
The D2R is an ECE-standard HID (xenon) discharge bulb operating at 85V and 35W, fitted with a P32d-3 base. Unlike the halogen types, it requires an external ignitor to initiate the electrical arc that produces light.
The D2R designation includes an "R" suffix, indicating it is specifically designed for reflector-type headlamp housings rather than projector-type units. Using a projector-specific bulb in a reflector housing, or vice versa, produces incorrect beam patterns.
For the 2001-2003 Lexus RX300, the low beam position accepts either a 9006 or a D2R depending on whether the vehicle was equipped with halogen capsule headlamps or HID headlamps. These two systems are not interchangeable, as HID operation requires high-voltage ignition hardware absent in halogen-equipped vehicles.
The year 2000 Lexus RX300 carries two separate entries for the high beam position: a 9005 and a 9006 (Halogen). The 9005 and 9006 use different base types, P20d and P22d respectively, meaning they are not physically interchangeable despite both being single-filament halogen bulbs.