Lexus RX450h Headlight Bulb Size

The Lexus RX450h uses 9005 and H9 bulb sizes for high beam headlights, while low beam headlights require H11 and D4S bulb sizes. The replacement chart covers 2010 through 2015 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

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
2015	9005	HB3	Check Price
2013-2014	9005	HB3	Check Price
2013-2014	H9 (With LED Headlamps)	H9	Check Price
2010-2012	9005	HB3	Check Price

Low Beam Headlight

Years	Bulb Type	Shop
2010-2015	D4S (With HID Headlamps)	Check Price
2010-2015	H11 (With Halogen Capsule Headlamps)	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). Single-filament halogen bulb with PGJ19-5 base. Also approved in the US. 12V, 65W.	H9	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). Single-filament halogen bulb with PGJ19-2 base. Also approved in the US. 12V, 55W.	H11	Check Price

Other Locations

Additional Notes

The 9005 and H9 bulbs share the same wattage rating of 65W and both operate on 12V, but they are not interchangeable. The 9005 uses a P20d base and follows the ANSI standard, while the H9 uses a PGJ19-5 base and follows the ECE standard. These differing base types mean one cannot physically substitute for the other.
The Lexus RX450h (2010-2015) uses the 9005 as the standard high beam bulb across all model years in the specifications. For 2013 and 2014, vehicles equipped with LED headlamps use the H9 instead, indicating a headlamp system-dependent fitment for those years.
The D4S is a mercury-free HID xenon discharge bulb rated at 42V and 35W, designed specifically for projector-type housings. Its high operating voltage distinguishes it from the halogen bulbs in these specifications, and it requires a ballast to function. It is not compatible with standard halogen headlamp housings.
The H11 low beam bulb operates at 12V and 55W, making it a lower-wattage halogen option compared to the 65W high beam bulbs. It uses a PGJ19-2 base, which differs from the bases of both the 9005 and H9, preventing cross-position substitution.
For the low beam position, the RX450h across 2010-2015 presents two distinct fitments depending on headlamp type: the H11 for halogen capsule headlamp systems and the D4S for HID headlamp systems. Selecting the wrong bulb type for the installed headlamp system would result in an incompatible fitment.
The D4S follows the ECE standard and carries a P32d-5 base. Because it is rated at 42V, it draws power from a high-voltage igniter and ballast circuit rather than the standard 12V vehicle electrical system that supplies the halogen bulbs in these specifications.
The H9, while an ECE-standard bulb, is noted as also approved for use in the United States, which accounts for its presence in the RX450h specifications alongside the ANSI-standard 9005 for the same model years.
All four bulb types in these specifications are single-filament designs, meaning each bulb serves only one lighting function. No dual-filament bulbs are present across any position or year listed.