Lexus GS430 Headlight Bulb Size

The Lexus GS430 high beam headlight uses a 9005 bulb size, while low beam headlights require D4S, 9006, or D2R bulb sizes depending on configuration. The replacement chart covers 2001 through 2007 model years 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.

High Beam Headlight

Years	US Type	EU Type	Shop
2001-2007	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
2005-2007	D4S	D4S	Check Price
2001-2004	D2R (With HID Headlamps)	D2R	Check Price
2001-2004	9006 (With Halogen Capsule Headlamps)	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 Lexus GS430 uses the 9005 bulb for the high beam headlight across all model years from 2001-2007. This is an ANSI-standard single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base.
The 9006 halogen bulb, rated at 12V and 55W with a P22d base, serves as the low beam light source in GS430 models from 2001-2004 equipped with halogen capsule headlamps. Although the 9005 and 9006 share a similar physical form, their base configurations differ, making them non-interchangeable despite a common misconception that they are compatible.
For 2001-2004 GS430 vehicles fitted with HID headlamps, the low beam position uses the D2R bulb instead. The D2R is an ECE-standard xenon discharge bulb operating at 85V and 35W with a P32d-3 base, designed specifically for reflector-type housings. It requires a separate external ignitor to initiate the arc discharge.
From 2005-2007, the Lexus GS430 low beam specification shifts exclusively to the D4S bulb, a mercury-free HID type operating at 42V and 35W with a P32d-5 base. The D4S is engineered for projector-type housings and is not interchangeable with the D2R used in earlier model years, as the two bulbs differ in base type, internal construction, and housing compatibility.
The D4S and D2R bulbs share the same 35W power rating but operate at substantially different voltages, 42V and 85V respectively, reflecting distinct ignition and ballast requirements that make their electrical systems incompatible with one another.
The transition from D2R to D4S in the 2005-2007 low beam specification also reflects a shift from reflector-type to projector-type housing design, as each HID bulb type is optically matched to a specific housing geometry and cannot perform correctly in the other.