Lexus GS400 Headlight Bulb Size

Lexus GS400 headlight bulbs utilize 9005 size for high beam and 9006 or D2R size for low beam applications. The replacement chart covers 1998 to 2000 model years with corresponding bulb 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
1998-2000	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
1998-2000	D2R (With HID Headlamps)	D2R	Check Price
1998-2000	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). 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 GS400 uses the 9005 bulb for the high beam headlight across all three model years covered, 1998-2000. This bulb follows the ANSI standard applicable in the US and Canada, operates on a 12V, 65W rating, and uses a single-filament halogen design with a P20d base.
The low beam headlight on the GS400 varies by headlamp system type. Vehicles equipped with halogen capsule headlamps use the 9006 bulb, while those equipped with HID headlamps use the D2R bulb. Both configurations are listed for each model year from 1998-2000.
The 9006 is an ANSI-standard single-filament halogen bulb rated at 12V and 55W, with a P22d base. Although it shares a similar form with the 9005, the two bulbs carry different base types, P20d versus P22d, which means they are not interchangeable despite their similar appearance.
The D2R is an HID (xenon) discharge bulb operating at 85V and 35W, with a P32d-3 base. It follows the ECE standard used in Europe and worldwide. Unlike halogen bulbs, the D2R requires an external ignitor to initiate and sustain the electrical arc that produces light.
The D2R designation specifically indicates compatibility with reflector-type headlamp housings. HID bulbs designed for projector-type housings carry a different designation, making housing type a critical factor in confirming correct fitment for the Lexus GS400 with HID headlamps.
The 9005 and 9006 bulbs both operate at 12V, consistent with standard automotive electrical systems, while the D2R operates at 85V. This voltage difference means the HID system on the GS400 requires dedicated high-voltage components separate from the standard low-voltage circuit used by the halogen configurations.