Lexus GS300 Headlight Bulb Size

The Lexus GS300 high beam headlight uses a 9005 bulb size, while low beam headlight configurations utilize 9006, D2R, or D4S bulb sizes depending on production specifications. The replacement chart covers vehicle data spanning 1993 to 2006.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	US Type	EU Type	Shop
1993-2006	9005	HB3	Check Price

Low Beam Headlight

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2005-2006	D4S	D4S	Check Price
1998-2004	D2R (With HID Headlamps)	D2R	Check Price
1998-2004	9006 (With Halogen Capsule Headlamps)	HB4	Check Price
1993-1997	9006	HB4	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament halogen bulb with P20d base. 12V, 65W.	9005	Check Price
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with P32d-5 base, for projector-type housings. 42V, 35W.	D4S	Check Price
ECE standard (Europe & worldwide). HID (xenon) discharge bulb with P32d-3 base, for reflector-type housings. Requires external ignitor. 85V, 35W.	D2R	Check Price
ANSI standard (US & Canada). Single-filament halogen bulb with P22d base. 12V, 55W.	9006	Check Price

Other Locations

Additional Notes

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 bulb across all Lexus GS300 model years from 1993 to 2006, making it the most consistently specified bulb in these headlight fitment records.
The 9006 bulb is an ANSI-standard single-filament halogen type rated at 12V and 55W, fitted with a P22d base. Although it shares the same voltage and general halogen construction as the 9005, its lower wattage and different base type mean the two are not interchangeable.
The D2R is an ECE-standard HID xenon discharge bulb rated at 85V and 35W, fitted with a P32d-3 base. It is designed specifically for reflector-type housings and requires an external ignitor to operate, which distinguishes it from self-contained halogen types.
The D4S is an ECE-standard mercury-free HID xenon discharge bulb rated at 42V and 35W, fitted with a P32d-5 base. It is designed for projector-type housings and represents a later HID standard compared to the D2R, with a different base and operating voltage that make the two types incompatible with each other.
For the 2005-2006 Lexus GS300, the low beam headlight position uses the D4S exclusively, indicating that those model years were equipped solely with projector-type HID headlamp systems.
For the 1998-2004 model years, the low beam position accommodates either a 9006 or a D2R bulb depending on whether the vehicle was built with halogen capsule headlamps or HID headlamps. Selecting the wrong bulb type for the installed housing would result in an incompatible fitment.
The D2R and D4S bulbs both operate on ECE standards and share the same 35W rating, but their base types, operating voltages, and compatible housing designs differ, meaning one cannot substitute for the other despite the shared wattage.
The 9005 and 9006 bulbs both conform to ANSI standards and operate at 12V, but they carry different wattage ratings and use distinct base types, P20d and P22d respectively, which prevents cross-substitution between the high beam and low beam positions.