The Lexus RX400h uses 9005 bulb size for high beam headlight and H11 or D2S bulb sizes for low beam headlight applications. The replacement chart covers 2006 to 2008 model year data 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.
The 9005 bulb serves as the high beam headlight across all three model years (2006-2008) of the Lexus RX400h. It is an ANSI-standard single-filament halogen type rated at 12V and 65W, fitted with a P20d base.
The low beam headlight position on the RX400h accommodates two distinct bulb types depending on the headlamp system installed at the factory, either H11 for halogen capsule headlamps or D2S for HID headlamps. This split applies uniformly across the 2006-2008 model years.
The H11 is a single-filament halogen bulb operating at 12V and 55W, using a PGJ19-2 base. It follows the ECE standard used in Europe and worldwide, though it also carries approval for use in the United States.
The D2S is a high-intensity discharge (xenon) bulb rated at 85V and 35W, fitted with a P32d-2 base. Unlike halogen types, it requires an external ignitor to initiate and sustain the arc discharge that produces light.
The D2S is specified for projector-type housings. This housing requirement is a functional necessity, as the optical design of a projector housing is engineered to control the focused, high-intensity output characteristic of HID discharge bulbs.
The 9005 and H11 bulbs share the same 12V operating voltage but differ in wattage, with the 9005 drawing 65W against the H11's 55W. The two bulbs also use physically incompatible bases, P20d and PGJ19-2 respectively, making them non-interchangeable.
The H11 and D2S low beam bulbs are governed by different electrical standards. The H11 operates on a standard 12V automotive circuit, while the D2S requires the significantly higher 85V supply generated by a dedicated HID ballast system.