Lexus IS300 Headlight Bulb Size

Lexus IS300 headlight bulbs utilize D4S and 9005 sizes for high beam applications, with D4S and D2R sizes for low beam configurations across multiple model generations. The replacement chart covers 2001 through 2016 production 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

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
2016	D4S (With HID Headlamps)	D4S	Check Price
2001	9005	HB3	Check Price

Low Beam Headlight

Years	Bulb Type	Shop
2016	D4S (With HID Headlamps)	Check Price
2001	D2R	Check Price

Bulb Specifications

Description	Type	Shop
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with P32d-5 base, for projector-type housings. 42V, 35W.	D4S	Check Price
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

Other Locations

Additional Notes

The D4S bulb, used in both the high beam and low beam positions of the 2016 Lexus IS300, is a mercury-free HID xenon discharge type rated at 42V and 35W, conforming to the ECE standard applicable in Europe and worldwide.
The D4S uses a P32d-5 base and is designed specifically for projector-type headlamp housings, meaning it is not interchangeable with bulbs intended for reflector-type housings.
The 2001 IS300 uses a 9005 bulb for the high beam position, a single-filament halogen type rated at 12V and 65W with a P20d base, conforming to the ANSI standard used in the US and Canada.
The low beam position on the 2001 IS300 uses a D2R bulb, an HID xenon discharge type rated at 85V and 35W with a P32d-3 base, designed for reflector-type housings and requiring an external ignitor to operate.
The D2R and D4S bulbs share the same 35W power rating but differ in operating voltage, base type, and housing compatibility, making them non-interchangeable despite both being HID xenon types.
The D2R conforms to the ECE standard and contains mercury, distinguishing it from the D4S, which is mercury-free under the same ECE framework.
The 9005 halogen bulb operates at a significantly higher wattage than either HID type listed, at 65W versus 35W, though HID technology produces considerably greater luminous output per watt than halogen.
The 2016 IS300 specification notes HID headlamps as a conditional fitment, indicating the D4S bulb size applies only to vehicles equipped with that headlamp configuration.