The low-beam headlights on the 2011 Lexus GS 350 use HID xenon bulbs, while the high beams are typically a separate halogen bulb. In practice, you’ll usually encounter D2S or D3S xenon bulbs for the low beam and a 9005 halogen bulb for the high beam, though exact configurations can vary by production date and trim. Confirming the exact bulb type for your car is essential before purchasing replacements.
Headlight system basics for the 2011 GS 350
To understand the bulb sizes, it helps to know how the GS 350’s headlights are built. The low beams are projector-type HID units tied to a ballast, and the high beams are often a separate halogen bulb. Because there were tweaks during production, the specific bulb model can differ between early and late 2010–2011 builds. Always verify against your vehicle’s owner’s manual, a label on the headlight housing, or by inspecting the bulb itself.
Low-beam bulbs (Xenon HID)
Before listing the common options, note that HID low beams require a xenon bulb compatible with the car’s ballast. The exact bulb type may vary by production date and trim.
- D2S HID bulb (older HID configurations)
- D3S HID bulb (more common on many late-2000s to early-2010s Lexus HID systems)
Conclusion: For the low-beam portion of the 2011 GS 350, you’ll typically be looking at a D2S or D3S xenon bulb, depending on your specific ballast and headlamp configuration. Always verify the exact type for your vehicle to ensure proper fit and performance.
High-beam bulbs
The high-beam portion, when it is a separate lamp, is usually a standard halogen bulb. The most common size on many 2011 GS 350 models is 9005 (HB3), though some trims or markets may use a slightly different size.
- 9005 (HB3) halogen bulb is the typical high-beam size
- 9006 (HB4) is an alternative you might encounter on some configurations
Conclusion: Expect a 9005 high-beam bulb on most 2011 GS 350 headlights, but verify with your owner’s manual or by inspecting the bulb labeling to be sure.
Additional considerations for replacement
Because HID assemblies use ballast and enclosed housings, replacement isn’t as simple as swapping a standard halogen bulb. If you’re changing HID bulbs, you’ll need to ensure the new bulb is compatible with your ballast system, and you may also need to handle the ballast and wiring carefully. For vehicles with HID low beams and separate halogen high beams, you’ll replace the HID bulb for the low beam and the halogen bulb for the high beam separately.
Summary
The 2011 Lexus GS 350 generally uses HID low beams and a separate halogen high beam. The low-beam bulb is typically D2S or D3S, while the high-beam bulb is usually 9005 (HB3), with some variations possible by production date or trim. To ensure accuracy, check your vehicle’s manual, the headlight label, or consult a Lexus dealer or a trusted auto parts retailer using your VIN to confirm the exact bulb sizes for your car.