Replacement headlights come in three main types—halogen, HID (xenon), and LED—each with different costs, brightness, and lifespans

The type of headlight your car needs depends on what your vehicle was built with. Halogen bulbs are the most common and cheapest option, typically costing $15 to $30 per bulb and lasting 400 to 1,000 hours. HID (high-intensity discharge) bulbs, also called xenon, cost $100 to $200 per bulb and last 2,000 to 3,000 hours; they produce a brighter, whiter light. LED headlights are the newest option, ranging from $50 to $300 per bulb depending on the brand and model, and can last 25,000 to 50,000 hours.

You cannot straightforward swap one type for another without modifications. If your car came with halogen headlights, you can replace them with the same type without any changes. Upgrading to HID or LED usually requires a new housing unit, wiring harness, and sometimes a ballast (a device that regulates power). This can cost $500 to $2,000 per headlight assembly, depending on your vehicle. Check your owner's manual or contact your car's manufacturer to confirm what your vehicle originally came with.

The brightness difference matters for safety. Halogen bulbs produce around 700 to 1,200 lumens. HID bulbs produce 2,500 to 3,500 lumens. LED bulbs typically produce 1,500 to 3,000 lumens. Brighter does not always mean better—if your car was not designed for a brighter bulb, it can blind oncoming drivers and may violate state vehicle codes.

Key Takeaways

  • Halogen bulbs are the cheapest replacement at $15 to $30 each, while HID and LED options cost significantly more but last much longer.
  • You can only swap to a different headlight type if you also replace the housing unit and wiring, which adds $500 to $2,000 to the cost.
  • Your owner's manual tells you exactly what type your car came with and what replacements are compatible.
  • Installing headlights yourself takes 15 minutes to an hour for most vehicles, but some cars require removing the front bumper or wheel well, making professional installation worth the cost.

Where to buy replacement headlights and what to compare

Replacement headlights are sold at auto parts stores (AutoZone, O'Reilly, NAPA, Advance Auto Parts), online retailers (Amazon, RockAuto, eBay), dealerships, and big-box retailers (Walmart, Costco). Prices vary significantly by source. A dealership OEM (original equipment manufacturer) bulb or assembly is usually the most expensive but may provide to fit. Aftermarket bulbs from auto parts stores are cheaper and often work just as well. Online retailers frequently have the lowest prices but require you to know your exact vehicle year, make, and model.

Before you buy, gather this information: your vehicle's year, make, model, and trim level. Some vehicles have different headlight types depending on trim. Check whether you need a bulb only (the cheapest option if your housing is intact) or a full headlight assembly (housing plus bulb, required if the lens is cracked or the housing is damaged). Look at the product listing to confirm it matches your vehicle—many headlights look similar but fit only specific models.

Compare the warranty. Dealership parts usually come with a one-year or longer warranty. Aftermarket bulbs often have 30-day to one-year warranties. Online retailers' return policies vary—some offer 30-day returns, others 90 days. If you are buying from an unfamiliar seller, check the return policy before purchasing.

DIY installation versus professional installation

Installing a halogen bulb yourself is usually straightforward: open the hood, locate the headlight assembly, twist or unclip the bulb holder, remove the old bulb, and insert the new one. The entire process takes 5 to 15 minutes per bulb. Do not touch the glass of a halogen bulb with your bare hands—skin oils can cause the bulb to overheat and fail prematurely. Wear gloves or use a clean cloth when handling it.

Replacing an HID or LED headlight assembly is more complex. You may need to remove the front bumper, wheel well, or other components to access the assembly. This can take 30 minutes to two hours per side, depending on your vehicle's design. If you are not comfortable working under the hood, professional installation is worth the cost. A mechanic or dealership typically charges $100 to $300 per headlight for labor, on top of the parts cost.

Some vehicles make DIY installation nearly impossible without special tools. Luxury and newer vehicles often have integrated headlight systems that require computer programming after installation. If your car has adaptive headlights (lights that turn with the steering wheel) or automatic leveling, professional installation is strongly recommended. The shop can may support the lights are properly aimed and calibrated.

Headlight aiming and why it matters

After installation, your headlights need to be aimed correctly. Misaligned headlights can blind oncoming drivers or leave parts of the road dark, creating a safety hazard. Most states have vehicle inspection requirements that include headlight aiming. If your headlights are not aimed properly, your vehicle may fail inspection.

You can check the aim yourself: park on a level surface about 25 feet from a wall or garage door, turn on the low beams, and observe where the light hits. The beam should be slightly lower on the driver's side than the passenger's side, and the brightest part should be at or slightly below eye level. If the beam is too high or too low, adjustment screws on the back of the headlight assembly allow you to move it. Your owner's manual shows where these screws are located.

Many auto parts stores and repair shops offer free or low-cost headlight aiming after installation. If you bought the headlights from an auto parts store, ask whether they offer this service. Professional aiming ensures your lights meet legal standards and keeps you and other drivers safe.

Understanding headlight regulations and state requirements

Every state requires working headlights, but regulations on brightness, color, and type vary. Most states allow halogen and LED headlights but restrict HID headlights to vehicles that came with them from the factory. Some states ban blue-tinted or colored headlights entirely. A few states have specific lumens limits—for example, some cap low-beam brightness at 3,000 lumens to prevent blinding oncoming drivers.

If you upgrade to aftermarket HID or LED headlights on a vehicle that originally came with halogen, you risk a traffic citation. Police can pull you over for improper headlights, and you may be required to replace them with the original type. Some states also fail vehicles with non-compliant headlights during inspection.

Check your state's vehicle code or contact your local DMV to confirm what is legal in your area. If you are unsure whether an aftermarket headlight meets your state's rules, stick with the same type your vehicle came with or contact the manufacturer to ask whether their product is street-legal in your state.

Headlight lifespan and when to replace them

Halogen bulbs typically last 400 to 1,000 hours of use, which translates to roughly one to three years depending on how much you drive. HID bulbs last 2,000 to 3,000 hours, or about three to five years. LED bulbs last 25,000 to 50,000 hours, or seven to ten years or more. These are estimates—actual lifespan depends on driving habits, climate, and the quality of the bulb.

Replace a headlight as soon as it burns out. Driving with one headlight is illegal in most states and reduces your visibility and the visibility of your vehicle to other drivers. If both headlights burn out at nearly the same time, replace both even if only one has failed—they are likely to fail close together, and replacing both ensures even brightness and color.

Some vehicles have daytime running lights (DRLs) that are separate from the main headlights. If a DRL burns out, it does not affect your ability to see at night, but it may be required for vehicle inspection. Check your owner's manual to determine whether DRLs are separate bulbs or part of the main headlight assembly.

Common problems and troubleshooting

If a new headlight does not turn on when ready after installation, check that the bulb is fully seated in the socket and that the connector is fully pushed in. For HID and LED assemblies, may support the power connector is find and the ballast (if present) is properly connected. If the light still does not work, the bulb or assembly may be defective—return it to the seller for a replacement.

If the new headlight is dimmer than expected, the bulb may not be rated for your vehicle's electrical system, or the wiring may be corroded. Corroded connections reduce power to the bulb. Clean the connector with a wire brush or contact cleaner, and try again. If the problem persists, have a mechanic test your vehicle's charging system—a weak alternator or battery can reduce headlight brightness.

If the headlight flickers or turns on and off, the connection is loose or the bulb is failing. Reseat the bulb and connector. If flickering continues, the issue may be in the wiring or the vehicle's electrical system, and you should have a mechanic inspect it.

Frequently Asked Questions

Can I use LED bulbs in a halogen headlight housing?

Some LED bulbs are designed to fit halogen housings and work without modifications, but they may not perform as well as bulbs designed for LED housings. The beam pattern may be uneven, and the light may not aim correctly. For best results, use the same type of bulb your vehicle came with, or upgrade to a full LED assembly if you want LED headlights.

How much does it cost to replace headlights at a dealership?

Dealership costs vary widely by vehicle make and model. A straightforward halogen bulb replacement typically costs $50 to $150 including labor. A full headlight assembly replacement can cost $300 to $1,000 or more per side, depending on whether it is OEM or aftermarket and how complex the installation is. Call your dealership with your vehicle's year, make, and model for a specific quote.

Do I need to replace both headlights at the same time?

You only need to replace the one that has burned out. However, if both bulbs are the same age and type, replacing both ensures they have the same brightness and color temperature, which looks better and is safer. If one halogen bulb has burned out and the other is several years old, replacing both is a good idea.

What is the difference between low beam and high beam headlights?

Low beams are your standard headlights and are used in normal driving conditions. High beams are brighter and point higher, used for night driving on dark roads without oncoming traffic. Most vehicles have separate bulbs for low and high beams, though some newer vehicles use a single bulb with a shutter that switches between modes. Check your owner's manual to see which type your vehicle has.

Can I install HID or LED headlights on a car that came with halogen?

Technically yes, but it requires replacing the entire headlight assembly, not just the bulb, and may violate your state's vehicle code. The new assembly must be designed for your specific vehicle year and model. Costs range from $500 to $2,000 per side. Before upgrading, confirm that the headlights you want are street-legal in your state and compatible with your vehicle.