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Short answer: To find the headlight bulb you need, check the owner’s manual bulb chart first, then read the code on the old bulb’s base, then confirm it with an online bulb finder using your year, make, model and trim. If you still cannot tell, give your VIN to a dealer or parts store. Always check whether your low beam and high beam use separate bulbs or one dual-beam bulb.
Key takeaways
- The owner’s manual is the fastest answer, but it lists bulbs for your exact trim, so check the model year and headlight type.
- The bulb code (H7, 9005, H11 and so on) is printed or stamped on the base, and US headlamp lenses carry an HB marking in front of each bulb.
- Several names refer to the same bulb, such as 9005 and HB3, or H4, 9003 and HB2.
- Look-alike bulbs are not always interchangeable, and a dual-beam bulb is not the same as a single-beam bulb.
What headlight bulb do I need for my car?
You can find your headlight bulb in four ways, and the most reliable is to use two of them together. The table lists each method with what to check and how far to trust it.
| Method | What to do | How reliable it is |
|---|---|---|
| Owner’s manual | Look for the bulb chart in the maintenance or lighting section | High, if you use the right model year and trim |
| Read the old bulb | Remove the cooled bulb and read the code on the base | High, if the previous owner fitted the right bulb |
| Online bulb finder | Enter year, make, model and headlight position | Good, but check for trim and headlight options |
| Dealer or parts store | Give the VIN or the exact trim | High, and useful when the manual is missing |
Do not rely on one source alone, because makers sometimes use different bulbs on different trims or headlight designs, such as reflector, projector or factory LED. If two methods agree, you can order with confidence.
How do you read the bulb code on a headlight?
Turn the car off, let the bulb cool, remove it and read the code printed or stamped on the plastic base. The code is usually a letter and number such as H7, H11 or 9005. On a US car you can also check the headlamp lens: the federal standard requires a replaceable-bulb headlamp lens to carry a permanent marking in front of each light source that states the HB type (FMVSS No. 108, S6.5.3.4.1), except where the only bulb is type HB1.
- On the bulb base: look for the code next to the maker’s name.
- On the lens: look for an HB number such as HB2 or HB3 printed by the bulb position.
- On the bulb box: the packaging often lists the code and the alias numbers.
Which bulb names mean the same thing?
Several bulb numbers are aliases for the same bulb, because the US and Europe use different naming systems. The table shows the pairs you will meet most often.
| Common name | Also called | Beam type |
|---|---|---|
| H4 | 9003, HB2 | Dual beam (one bulb makes both beams) |
| 9005 | HB3 | Single beam, often the high beam |
| 9006 | HB4 | Single beam, often the low beam |
| H7 | – | Single beam, often the low beam |
| H11 | Looks like H8 and H9 | Single beam, often the low beam or fog light |
| H13 | 9008 | Dual beam |
Look-alike bulbs can be traps. H11 and H11B have different connectors, and a bulb that fits the socket is not always correct for the headlamp. See our guides on whether H4 and 9003 are the same, whether 9005 and 9006 are interchangeable and whether H11 fits H8 and H9 sockets.
Does your car use single-beam or dual-beam bulbs?
Check how many bulbs sit behind each headlamp lens. A dual-beam setup uses one bulb with two filaments for both low beam and high beam, while a single-beam setup uses one bulb for each beam. The two need different replacement bulbs, so confirm which one you have before you order.
- One bulb per headlamp: usually a dual-beam bulb such as H4. It makes the low and high beam from one socket.
- Two bulbs per headlamp: usually single-beam bulbs, such as H7 for low beam and H1 for high beam.
- Different left and right housings: uncommon, but check both sides if the car has been repaired.
For how the two beams differ, see high beam vs low beam.
What mistakes lead to the wrong bulb?
Most wrong-bulb orders come from trusting a general guide instead of the exact car. These are the common causes.
- Wrong trim or year: the same model can use different bulbs by trim or by headlight option.
- Mixing up low and high beam: the two beams often use different bulbs, so replace the one that has failed.
- Look-alike bulbs: H11 and H11B, or H8 and H9, share a shape but not every detail.
- Different bulb technology: a halogen socket is not the same as an HID (D-series) socket, which has a ballast.
- Space behind the lamp: an LED bulb with a heatsink needs room behind the headlamp and a dust cover that still closes.
What should distributors do to prevent wrong-bulb returns?
Ask for the vehicle make, model, year and trim before you recommend a bulb, and give the customer a cross-reference of aliases. Most returns for fitment come from the same few mix-ups, so a short checklist saves time.
- Fitment lookup: offer a finder by make, model, year and headlight position.
- Alias table: print common aliases on the box, such as H4 / 9003 / HB2 and 9005 / HB3.
- Beam type: say whether the bulb is dual-beam or single-beam on every SKU.
- Return log: record the reason for every return, so you can see which models cause confusion.
When you source LED headlight bulbs from an OEM supplier, ask which sockets each model covers, how much space it needs behind the lamp, and whether the supplier provides a fitment list by vehicle.
How TUHO supplies this category
TUHO lists headlight bulbs by socket in its headlight bulb range, with separate pages for H7, H11, 9005, 9006, H4, H1 and other sockets. For example, the V25 Canbus bulb is listed for H1, H7, H11, 9005, 9006, 9012 and H4 sockets. Confirm the socket and the beam your car uses before you order. Documents and approvals are confirmed per model and per order.
Sourcing headlight bulbs for your range? TUHO supports OEM/ODM, custom logo and packaging, mixed-SKU orders and sample testing. Request a quote
FAQ
How do I find out what headlight bulb my car takes?
You find out what headlight bulb your car takes by checking the owner’s manual, reading the code on the old bulb’s base and confirming it with a bulb finder. If you are still unsure, a dealer can look it up with your VIN.
Where is the bulb number on a headlight bulb?
The bulb number is printed or stamped on the plastic base of the bulb, and the packaging also lists it. On a US headlamp lens, an HB marking in front of the bulb gives the bulb type.
Is HB3 the same as 9005?
Yes, HB3 and 9005 are two names for the same single-beam bulb. HB3 is the designation used on the headlamp lens, and 9005 is the common retail name.
Do my left and right headlight bulbs use the same size?
Usually yes, left and right headlights use the same bulb size for the same beam. Check both sides if the car has been repaired or fitted with aftermarket headlamps.
Can I use a different bulb type in my headlight?
You should only use a bulb that fits the socket and gives the right light pattern for your headlamp. A bulb that physically fits can still scatter light or cause glare, so match the code and the beam type.
Bottom line: Check the manual, read the old bulb, confirm with a finder and, if needed, a VIN lookup. Know whether your car is single-beam or dual-beam, and match the code exactly.
Editorial note: The lens marking rule was checked in November 2026 on Cornell LII (49 CFR 571.108, S6.5.3.4.1). Bulb aliases are the common names used by lamp makers and retailers, and exact fitment depends on your vehicle’s trim and headlamp design. Product details come from the TUHO V25 listing.
