Many people ask whether they can replace their car's halogen headlights with LED lights. In fact, whether a bulb can be replaced depends primarily on the “model” and “base”. If the model is incorrect, no matter what kind of light it is, it won't fit at all!
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The 7 Most Common – Headlight Base Specifications
Car lights are divided into H series and D series. The H series refers to the original halogen bulb series, while the D series refers to the original xenon (HID) bulb series. Once we understand this, let's take a look at what the H series includes.
1. H1
H1 is a single filament bulb commonly used for high beam and low beam lighting. Due to the distance between the filament and the base, it is prone to filament breakage during strong vibrations, so it is less commonly used in newer car models.
Common models: CR-V 3rd generation, TIGRA with projector headlights, etc.
2. H4
H4 is a dual filament bulb, commonly known as a high/low beam integrated bulb. For car manufacturers, it is cost-effective and widely used in mid-range to lower-end models.
Common models: Toyota Yaris, standard motorcycle headlights, etc.
3. H7
H7 is a single filament dual base bulb commonly used for low beam lighting. Its design is relatively compact, making it one of the mainstream headlight models. European car models often prefer the H7 specification, possibly because it allows for the creation of specialized bases to achieve differentiation.
Common models: VW Tiguan (requires an adapter), Ford Focus, etc.
4. H8 / H9 / H11
H8 / H9 / H11 are single filament dual base L-shaped bulbs that are widely used and have a compact design, making them one of the mainstream headlight models. Japanese car models often prefer the H8 / H9 / H11 specifications.
However, the base and appearance of H8 / H9 / H11 are essentially the same; the difference lies in the wattage of the halogen bulbs, which determines their application:
H8 is 35W, typically used in fog lights.
H9 is 55W, generally applied in high beams.
H11 is 55W, commonly used in low beams.
Since the base specifications are the same and LED bulbs generally have lower wattage than halogen bulbs, H8, H9, H11, and H16J LED bulbs can be interchangeable.
Common models: TOYOTA Sienta, NISSAN Kicks, etc.
5. 9005（HB3） 
9005 (HB3) is a single filament dual base L-shaped bulb. The 9005, also known as HB3, is typically used for high beams.
9005 (HB3) is a single filament dual base L-shaped bulb. The 9005, also known as HB3, is typically used for high beams. Common models: TOYOTA 10th generation Altis, 4th generation RAV4, etc.
6. 9006 ( HB4 )
9006 (HB4) is a single filament dual base L-shaped bulb. It is typically used for low beams.
Common models: TOYOTA 10th generation Altis, Camry.
7. 9012（HIR2）
9012 (HIR2) is a single filament dual base L-shaped bulb. It is typically used for low beams and projector headlights.
Common models: TOYOTA 12th generation Altis, C-HR, etc.
The above are the specifications for original car bulbs. When upgrading or replacing light sources, they have already been designed and configured, so as long as you choose the correct model, you can install them. Make sure to check the model and don't get the wrong one again!
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