For the 2011 Infiniti G37, the bulb type depends on whether your headlights are HID or halogen. If your car has factory HID headlights, the low-beam bulb is a xenon bulb (D2S or D1S depending on trim/market); if your headlights are halogen, the low-beam bulb is typically H11. High beams are generally 9005 (HB3), and fog lights commonly use H11.
Headlight configurations and what they mean for bulb choices
The G37 offered both HID projector headlights and traditional halogen headlights in the 2011 model year. The exact bulb you need hinges on which setup your vehicle has. Use the guidance below to identify the correct bulb and avoid buying the wrong part.
HID (xenon) low-beam bulbs
For G37s equipped with factory HID projectors, the low-beam bulbs are from the xenon family. The common options are D2S and D1S variants. The ballast and housing determine compatibility, so check the bulb itself or the ballast label to confirm.
- D2S
- D1S
In practice, many 2011 G37 HID systems use D2S bulbs, but some markets/models used D1S. Always verify by inspecting the existing bulb or ballast label.
Halogen low-beam bulbs
If your G37 uses halogen headlights, the low-beam bulb is typically an H11. The high-beam bulb in halogen setups is usually 9005, and the fog lights commonly use H11 as well, depending on trim.
- H11 (low beam)
- 9005 (high beam)
- Fog lights typically H11 as well
Note: Some trims or regional models may differ. Always confirm by inspecting the current bulb or consulting the owner's manual for your exact VIN.
How to verify the correct bulb for your car
To avoid buying the wrong bulb, use these steps to confirm the correct type before purchasing:
- Check the owner's manual for bulb specification and replacement procedure.
- Inspect the existing bulb or the ballast label on HID systems to determine the exact part number (D1S vs D2S).
- Physically compare the bulb or consult a parts catalog by your vehicle's trim and market (year 2011 G37; some markets used different bulbs).
Concluding: Once you identify HID vs halogen, you can select the matching bulb type: D2S or D1S for HID low beams, or H11 for halogen low beams; high beams are typically 9005, with fog lights often H11.
Summary
The 2011 Infiniti G37 requires different headlight bulbs depending on whether your headlights are HID or halogen. Verify your setup by checking the ballast and bulb label, then choose the correct bulb: HID low beams typically D2S/D1S, halogen low beams typically H11, with high beams usually 9005 and fogs often H11. Always confirm with the manual or a trusted parts catalog to ensure compatibility for your exact trim and market.
What year G37 to stay away from?
Like most cars, the G37 had some improvements over its lifespan, so the worst Infiniti G37 years are the earliest—in this case the 2008-2009 cars. We're talking small differences, though, because the car changed little during its seven-year production run and it has generally proved reliable.
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How much is a 2011 G37 worth?
2011 INFINITI G Pricing
| Original MSRP | KBB Fair Purchase Price (national avg.) | |
|---|---|---|
| G37 Sport Sedan 4D | $41,095 | $8,375 |
| G37x Sport Appearance Edition Sedan 4D | $41,675 | $8,225 |
| G37 Journey Coupe 2D | $44,245 | $7,150 |
| G37 Sport Coupe 2D | $44,245 | $9,150 |
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Is H11 the same as 9140?
They are identified and referenced using a part number (bulb size or bulb number). You may have heard of popular bulb sizes like H11, 9005, or H13. For example, H11 is the same as H8 and H9. 9005 is equivalent to HB3, H10, 9040, 9055, 9140, 9145, 9150, and 9155.
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Do I need H11 or 9005?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.
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