In most passenger cars, H11 is the low-beam headlight bulb and 9005 is the high-beam bulb (HB3). Always confirm with your vehicle’s manual or the bulb labeling, because a few models use different configurations.
Understanding low beam and high beam differences
Low-beam headlights illuminate the road directly in front of you without creating excessive glare for oncoming drivers, suitable for regular night driving. High-beam headlights are brighter and project light farther down the road, but should be used only when there is no traffic in front of you to avoid blinding others.
Typical bulb mappings
Below are the common roles for these bulb types in modern cars. Note that variations exist by make and model.
- H11 is commonly used for the low-beam headlight in many vehicles.
- 9005 (also known as HB3) is commonly used for the high-beam headlight in many vehicles.
Keep in mind that some vehicles may use different bulbs for low or high beams, or may employ alternate modules with different base designs. Always verify with the owner's manual or the existing bulb in your headlight housing.
Exceptions and how to verify
If you're unsure, consult the vehicle’s owner manual, check the bulb label on your current bulb, or use the manufacturer’s bulb finder tool. When replacing, ensure you match the base type, wattage, and compatibility with your lighting system.
Summary
Short answer: For most cars, H11 is the low-beam bulb and 9005 is the high-beam bulb. However, always confirm with your specific vehicle’s documentation, as some models may deviate from the standard configuration.