Headlight bulb size isn’t universal; it depends on your car. To know yours, check the owner’s manual, inspect the bulb in the headlight, or look up the bulb part number on the packaging or the manufacturer’s site.
In this guide, we walk you through identifying the correct bulb size for your vehicle, outline common bulb types you’re likely to encounter, and offer tips for safe replacement and shopping, including models that use HID or LED systems.
How to determine your bulb size
Follow these steps to confirm the exact bulb size for your vehicle.
- Check the owner's manual or the vehicle’s official website for the bulb specification.
- Open the headlight area and inspect the bulb you currently have; note the base type printed on the base (for example, H7, H11, 9005). Ensure the car’s battery is disconnected before touching electrical components.
- Carefully remove the bulb to check its markings. Halogen bulbs typically have the base type and wattage printed on the metal base or plastic connector (e.g., 12V 55W H11).
- Use your vehicle’s make/model/year in a trusted parts retailer’s lookup tool to verify the exact bulb size. Some sites show multiple options depending on trim level.
- If you can’t access the bulb easily or markings are faded, contact a dealership or auto parts specialist with your VIN for precise confirmation.
By following these steps, you can confirm the exact bulb size your car requires and avoid buying the wrong part. If you’re unsure, bring the old bulb to the store for a precise match or ask staff to verify online compatibility with your car.
Common headlight bulb types and sizes
Some sizes appear most often in modern vehicles, but your model may use a different option or a different lighting technology (LED/HID). Use the steps above to confirm the exact size for your car.
- H11 — a common single-filament halogen bulb used for many low-beam headlights on newer cars
- 9005 (HB3) — frequently used for high-beam headlights on many models
- 9006 (HB4) — commonly used for low-beam or certain fog-light applications on various cars
- H7 — widely used for low-beam headlights on many European and Asian vehicles
- H4 (HB2) — older dual-beam bulb (low/high) used on many classic and some current models
- H13 — dual-filament bulb used for combined high/low beams on a subset of vehicles
- H8, H9, H16 — smaller halogen options often used for fog lights or specific trim packages
Keep in mind that vehicle configurations vary widely. The exact size your car requires may not be one of these, so always verify with your owner’s manual or a reliable lookup tool for your exact model and trim.
Special cases: HID and LED headlights
Many modern cars use HID (xenon) or LED headlight assemblies, where the replacement may not involve a simple “bulb size.” If your car uses HID or LED, the correct part is determined by the lamp type, ballast, or module, and you may need to replace a component rather than a standard halogen bulb.
HID (xenon) headlights
HID bulbs are not interchangeable with halogen bulbs. They require a ballast and a bulb type specific to the system (examples include D4S, D5S, D2S, D3S). Replacing HID components often means matching both the bulb and the ballast, and some systems require dealer service. Always consult your manual or a qualified technician before swapping.
LED headlights
LED headlights may come as complete modules or as replaceable LED bulbs that demand compatible drivers and wiring. Because LED systems vary by manufacturer, you should use the exact part number or a verified LED replacement designed for your vehicle. If upgrading or replacing, confirm compatibility with your vehicle’s electrical system and warranty.
Tips for safe handling
Always disconnect the battery and wear gloves when handling bulbs. Do not touch the glass with bare fingers; skin oils can shorten bulb life. Reinstall the protective cover, and test the headlights with the engine running. If you notice flickering, dimming, or misalignment after replacement, have the system checked for ballast, wiring, or housing issues.
Where to buy and how to confirm compatibility
Once you know the exact size and type, you can source the right bulb from several channels. Use these options to confirm compatibility before purchase.
- Owner’s manual or the dealership service department for your specific model
- Manufacturer official parts website, often using your VIN to verify fit
- Major auto parts retailers that offer vehicle lookup tools (e.g., AutoZone, Advance Auto Parts, O'Reilly)
- Online marketplaces with model- and trim-specific filters (always verify fitment in the product description)
When shopping online, enter your vehicle’s year, make, and model (and sometimes trim) to confirm the exact bulb size. If unsure, call or visit a store with your car’s details or bring the old bulb to ensure you’re buying the correct part.
Summary
Determining headlight bulb size starts with your vehicle’s documentation and a careful check of the current bulb’s markings or part number. Use a reliable lookup to confirm the exact size, and be mindful of models that use HID or LED systems that require different replacement approaches. With the right part, you’ll restore proper illumination and maintain road safety.
What headlight bulb for 2005 CRV?
Honda CR-V (2005-2006) Bulb Size Chart
| Headlights (High Beam and Low Beam) | H4 (9003 HB2) |
|---|---|
| Headlights (Low Beam) | H1 |
| Front Fog Lights | 9006 (HB4) |
| Reverse Light (Back-Up Light) | 7443 (7440) |
| Brake Light (Rear)(Vehicle Origin: JPN) | 7443 (7440) |
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How do I find my headlight bulb size?
Every headlight is designated with a bulb size. For a bulb installed in your car, you can find the number stamped or printed on the side of the bulb. It's also listed in the service manual and in an auto bulb guide. Only the correct bulb size will fit in the headlamp housing and connect to the factory wiring.
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What bulb for a Tiffany lamp?
Most modern Tiffany lamps use standard E14, E27 or B22 lamp holders, so LED bulbs are perfect. You should select dimmable LEDs for added control, and make sure your dimmer switch is LED compatible.
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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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