Where you buy headlights depends on what failed. A dead low beam is a same-day part you can grab at O’Reilly or AutoZone tonight. A hazy lens is a restoration kit, not new hardware. A cracked or fogged-inside housing means replacing the whole unit, and RockAuto, eBay, or the dealer usually wins on that one. Decide which of the three you need before you spend anything.
This page contains affiliate links. We may earn a commission at no extra cost to you.
Source, Lens, or Whole Unit? Diagnose Before You Buy Headlights
A headlight is the forward-facing lamp in a vehicle’s automotive lighting system, built to light the road ahead and keep the car visible to oncoming vehicles. One word covers two purchases: the replaceable light source, and the housing that holds it behind a lens. Most failures are the source. Water standing inside, a broken mounting tab, or a crack through the lens means the whole unit is done.
| Symptom | What to buy | Fastest source |
|---|---|---|
| One side dark, other side fine | A matched pair of replacements | Parts store counter |
| Both sides dim or flickering | Check battery and wiring first | Free battery test at a parts chain |
| Yellow, cloudy lens | Restoration kit with UV clear coat | Parts store or Walmart |
| Condensation or cracks inside | Replacement headlight assembly | RockAuto, eBay, or dealer |
| High beam, fog, or DRL out | A different size code than the low beam | Counter lookup by year, make, model |
That second row trips people up. A good capsule on a weak charging circuit flickers like a failing one, so a new pair will not fix it. If yours is aging, our Interstate Batteries guide covers where to replace it.
Reading the Size Code and Picking a Light Source
The size code stamped on the base of the part you are pulling decides everything else. H7, H11, 9005 (HB3), 9006 (HB4), 9012, H13, and 9008 cover a large share of cars and trucks on US roads. A 9005 will not seat in an H11 socket, and forcing the wrong base cracks the connector. European fitments on BMW, Mercedes-Benz, and Porsche often use H7; many Nissan, Subaru, and Hyundai models run H11. Low beam, high beam, and fog positions frequently take three different codes on one car, so confirm each by VIN or by year, make, and model.
- Halogen: a filament burning in halogen gas. Standard equipment on most vehicles built before the late 2010s, warm white, and always plug-compatible with the original socket.
- LED: light-emitting diode packages that run whiter, draw less current, and reach full light output instantly. Factory LED units are now common standard equipment on new models.
- HID/xenon: an arc in a gas capsule, driven by a ballast, that throws an intense beam of light after a short warm-up.
Housing optics matter as much as the source. A reflector bowl bounces light off a mirrored surface, and reflector technology is tuned to a filament of a specific size and shape. Projector technology sends light through a small lens with a hard cutoff along the top edge. A source built for one set of optics scatters glare in the other, which is what blinds oncoming drivers.
Color temperature is not brightness. Standard halogen sits near 3,200K; 5,000K to 6,000K reads as pure white; above about 8,000K the beam turns blue and puts less usable light on wet pavement. Advertised lumen figures on LED kits are often measured at the bare emitter, and listings for the same kit can disagree by a factor of three.
Sealed beam units for classic cars and the 5.75-inch size
Older vehicles use sealed beam lamps, where the parabolic aluminized reflector, filament, and lens are one glass part replaced whole. Round 7-inch and 5.75-inch sizes fit many classic car and early Jeep applications, and chrome trim reproductions are still made. If your Ford, Dodge, Chevrolet, or Volkswagen predates the 1990s, search by diameter instead of a size code. Sylvania and Philips both still list halogen sealed beam replacements.
What FMVSS 108 and IIHS Ratings Mean for Your Purchase
Federal Motor Vehicle Safety Standard 108 is the NHTSA rule covering every light and reflector on a road vehicle, and it incorporates SAE performance requirements. Since a 2005 Federal Register notice, NHTSA has treated it as a performance standard: a replacement headlamp system can use a different source than the original, as long as the complete system meets the photometry. Compliant parts carry a DOT marking. NHTSA publishes the equipment rules.
The practical catch is LED headlight bulbs sold as drop-in replacements for halogen. No federal certification covers an LED capsule inside optics designed for a filament, which is why reputable brands label these kits for off-road or fog use. Diode Dynamics, an LED maker, states plainly that its products are not street legal in US headlights. A full LED headlamp assembly certified as a system is a different product and can be compliant.
Two newer rules shape what you can buy. A February 2022 final rule amended FMVSS 108 to allow adaptive driving beam (ADB) headlighting, which reshapes the main beam around other vehicles, and NHTSA denied every petition to reconsider it in December 2024. Separately, the Insurance Institute for Highway Safety rates how well each headlight type lights straight roads and curves. For 2026 awards, a model needs acceptable or good headlights on every trim, and ratings often differ between trims of the same car. If you are shopping a used sedan or SUV, check the IIHS rating for the exact trim, because a better-rated factory unit from a higher trim is sometimes the smartest headlight upgrade available.
Where to Buy Headlights In Store
Parts chains are the answer when the car has to be legal by tonight. Each will look up your year, make, and model at the counter and pull the right code off the shelf.
O’Reilly Auto Parts
O’Reilly advertises free bulb installation with purchase on many vehicles. The exceptions are spelled out: jobs that require removing the battery, the air cleaner box, or body panels are exempt. Their lookup covers fog and high beam codes too, and tail lights sit in the same aisle, which saves a second trip if you do all four corners at once.
AutoZone
AutoZone keeps deep walk-in lighting stock, including Sylvania, Philips, and the house Duralast brand, plus complete units for common vehicles. Installation is not a listed chain-wide service, though staff at some stores will help with an easy-access socket. Check their catalog to confirm the code first.
Advance Auto Parts, NAPA, and Pep Boys
Advance Auto Parts closed roughly 700 corporate and independent locations in 2025, so check its store finder before driving over. Its site often runs online-only promo codes that undercut the shelf price for in-store pickup. NAPA Auto Parts leans professional and stocks heavier-duty lighting for pickup trucks and fleets. Pep Boys pairs a parts counter with service bays, useful when the bumper cover has to come off.
Walmart
The Walmart automotive aisle covers the common codes (H11, 9005, 9006, H7) and lens restoration kits. Obscure sizes usually are not on the shelf, though Walmart.com lists third-party LED brands such as Lasfit for ship-to-home.
Your dealership
The dealer counter is the right call for OEM headlamp assemblies on newer vehicles, especially adaptive units and anything with an integrated turn signal or daytime running lights (DRL) module. Those parts are usually ordered in, so call ahead.
Buying Online: Amazon, RockAuto, eBay, and Brand Stores
Online is where the selection lives: every size code, upgrade kits, HID systems, and headlight assemblies no local shelf carries.
Amazon
Amazon carries the widest catalog of the lot, including odd fitments that never reach retail shelves. Use the vehicle Garage filter, buy from listings shipped and sold by Amazon or the brand’s own storefront, and read the newest reviews for complaints about color match between the two sides of a pair. Browse the current listings.
RockAuto
RockAuto is the default for complete units and discontinued part numbers, with aftermarket units from Depo and TYC listed beside OEM parts. Match the part number to your VIN first. RockAuto says shipping costs are not refunded unless it made the mistake, and a boxed full-size assembly is expensive to send back.
CAPA certification, from the Certified Automotive Parts Association, is granted per part number rather than per brand. Look up the exact number on CAPA’s site before trusting a listing’s badge.
eBay, Champion, and buying brand direct
eBay is worth a look for used OEM units pulled from salvage vehicles, such as a Jeep Grand Cherokee or a GMC pickup unit, often well under dealer pricing. Inspect photos for broken tabs and internal haze. Champion Auto Parts lists its lighting range and points to stockists through a store finder. Philips automotive products come from Lumileds, which licenses the Philips name, and Sylvania products come from ams OSRAM, which kept its aftermarket replacement line when it sold its headlamp module business in 2022. Both run brand stores, and LED specialists including Lasfit and Hikari ship direct.
Five Picks Worth a Look, With Honest Caveats
Two of these are DOT-marked halogens, the safest choice for street use. The three LED kits are popular sellers whose published specs vary by listing, so read the exact model before ordering.
Premium halogen: Philips X-tremeVision Pro150. Philips claims up to 150 percent more light, measured against the legal minimum standard rather than against typical stock halogens. The 9005 version lists 1,860 lumens at 3,500K. Sold in H7, H11, 9005, and 9006, with no socket changes. Check price on Amazon
Inspection-friendly upgrade: Sylvania SilverStar Ultra. Sylvania calls it its brightest downroad halogen, and a tri-band blue coating makes it whiter than the Basic line (O’Reilly lists the H1 at 4,100K). DOT and SAE compliant, with a 1-year limited warranty at O’Reilly. Check price on Amazon
H11 LED kit: Hikari Ultra LED. Sold with built-in CanBus and 6,000K output. Marketplace listings claim 12,000 lumens per pair, while one review site lists less than half that, so treat the number as marketing. For off-road or projector-housing use. Check price on Amazon
Budget LED kit: Fahren H11 LED headlight bulbs. Consistently listed at 6,500K and marketed as CanBus-ready on most vehicles, though some cars still need a separate decoder to stop dash warnings. Lumen claims range wildly between listings. Check price on Amazon
H7 for European fitments: Lasfit H7 LED. Lasfit sells several H7 lines (LA Plus, LCplus, L1 Plus) at different wattages, aimed at the H7 sockets common on Volkswagen, BMW, and Audi. Confirm the heat sink length fits behind your dust cap. Check price on Amazon
Mistakes That Cost More Than the Part
The most expensive mistake is shopping color instead of beam quality.
- No-name 10,000K blue bulbs. They put less usable light on the road than the stock halogen they replace. A higher color number is not more visibility.
- LED capsules in halogen reflectors. An emitter shaped nothing like a filament sits off the focal point, throwing light upward and leaving dark patches ahead.
- Replacing one side only. Both sides aged together, so the survivor is close behind. Doing the pair keeps the beam even and saves a second teardown.
- Buying style instead of light. Halo rings, RGB accents, and blacked-out shells from brands like Oracle change the look without improving what you see, and many styling parts skip DOT marking. If cosmetics are the goal, spend on trim you notice in daylight, like the wheel covers in our hubcaps guide.
Doing the swap without ruining the new pair
- Read the code off the old part, not just the manual, since printed guides list discontinued numbers.
- Let it cool, then unplug the connector before twisting the retainer.
- Handle glass with a clean nitrile glove. Skin oil bakes onto a halogen envelope and shortens its life.
- Seat the retainer fully, reconnect, and test both beams before closing the hood.
- Compare the new cutoff on a flat wall against where the old one fell, then adjust the aim screws if it sits high.
Older cars are a minutes-long job from the engine bay. Newer sedans and SUVs may need the air intake, battery, or bumper cover out of the way, which is exactly where O’Reilly’s free installation stops and a shop pencils out.
Start by reading the code off the part you are pulling. Then price headlights at O’Reilly or AutoZone for a same-day fix, or at Amazon or RockAuto if the car can wait a few days. If the lens is the problem, restore it before buying anything brighter. For the rest of the vehicle see our car parts guide, and for the household kind our light bulbs guide.
Common Questions Before You Buy
How much do headlights cost?
A pair of standard halogen bulbs is the cheapest fix, premium halogens and LED kits cost more, and a complete unit costs several times more. Adaptive or matrix units on luxury models sit at the top. Price the exact part number at two retailers, because the spread on complete units is wide.
Are LED conversion kits street legal?
Generally no, when the LED capsule goes into a housing built for halogen. FMVSS 108 certifies the complete headlamp system, and no drop-in LED capsule is certified inside halogen optics, so most kits are labeled for off-road use. Enforcement varies by state, so check your own inspection program.
How do I find the right bulb code for my car?
Read the code molded into the base of the part you are removing, then cross-check the owner’s manual under lamp replacement. Year-make-model lookups at AutoZone, O’Reilly, and RockAuto confirm it. Low, high, and fog positions often use three different codes on the same car.
What are the three main types of headlights?
Halogen, HID/xenon, and LED, with sealed beam as a legacy fourth on many pre-1990s vehicles. Halogen burns a filament in halogen gas, HID strikes an arc and needs a ballast, and diode emitters reach full output instantly.
Can I fix cloudy lenses instead of replacing the whole unit?
Usually, yes. Clouding is UV damage to the polycarbonate surface, so wet-sanding and polishing restores clarity for a fraction of the cost of a new unit. Finish with the UV-blocking clear coat most kits include, or the yellow haze returns much faster.
Why do newer cars look so much brighter to oncoming drivers?
Three things stack up: whiter light reads as harsher to the eye, trucks and SUVs mount their lights higher, and a misaimed unit loses the sharp cutoff that keeps glare off other windshields. Aim is the part you control, and it takes minutes against a flat wall.
Editorial review: wheretobuyguides.com team.