When to Replace Your Headlights (Halogen)
Average lifespan, warning signs, and whether to repair or replace.
Average Lifespan
2-5 years
Replacement Cost
$15 - $100
Category
Auto
How Long Does a Headlights (Halogen) Last?
Halogen headlight bulbs last 2 to 5 years (500 to 1,000 hours of use), making them one of the most frequently replaced auto parts. The filament inside the bulb slowly evaporates with use, depositing tungsten on the glass envelope and gradually dimming the light output. By the time a halogen bulb burns out, its twin on the other side is usually at 50-70% brightness... which is why the recommendation is always to replace both bulbs at the same time. LED headlights last dramatically longer: 30,000 to 50,000 hours, which is effectively the life of the car. Factory LED headlights (increasingly common since 2018) almost never need bulb replacement. However, the LED driver module can fail ($100-$400 to replace), and the sealed assemblies sometimes develop moisture issues. HID/Xenon headlights last 2,000 to 3,000 hours (5 to 8 years). They dim gradually and shift from bright white to pink/purple as they age, which is a clear visual indicator that replacement is needed. Headlight lens clarity is a separate issue from bulb lifespan. The polycarbonate lens cover on modern headlights yellows, hazes, and oxidizes from UV exposure over 5 to 10 years. This can reduce light output by 50-75% even with brand-new bulbs. Lens restoration ($15-$30 DIY, $50-$150 professional) is one of the best safety and appearance upgrades for an older car. Driving at night with hazy headlights is like wearing dirty glasses... you don't realize how bad it's gotten until you fix it.
Warning Signs It's Time to Replace
Signs your headlights (halogen) is failing or going bad
If you're seeing two or more of these, it's time to start shopping.
- ⚠️One headlight is noticeably dimmer than the other — Halogen bulbs dim gradually as the filament thins. If one side is visibly dimmer, replace both... the bright side isn't far behind the dim one.
- ⚠️Headlight bulb burns out — The most obvious sign. When one halogen bulb dies, replace both. The remaining bulb has the same hours on it and will fail soon. Driving with one headlight is also a ticket-worthy offense.
- ⚠️Headlight lenses are yellow, hazy, or foggy — This is the lens, not the bulb. UV oxidation clouds the polycarbonate cover over 5-10 years. Restoration kits ($15-$30) or professional polishing ($50-$150) can restore clarity.
- ⚠️HID headlights have shifted to pink or purple — HID bulbs change color as they age. A shift from bright white to pinkish or purple means the gas mixture is depleted and the bulb is near end of life. Replace in pairs.
- ⚠️Headlights flicker or take longer to reach full brightness — For halogen: a flickering bulb has a failing filament and will die soon. For HID: slow start-up or flickering indicates a failing ballast ($50-$200) rather than the bulb.
- ⚠️You can't see the road as well as you used to at night — Headlight dimming is so gradual that most drivers don't notice. If night driving feels harder than it used to, check both bulb condition and lens clarity.
Should You Repair or Replace?
Headlight bulb replacement is straightforward and cheap for halogen: $15 to $50 per pair for quality bulbs, and 15-30 minutes to install on most vehicles. Always replace in pairs... mismatched brightness looks wrong and the other bulb is close to failure anyway. HID bulb replacement is $50 to $150 per pair. If the HID bulb is fine but the ballast has failed, the ballast costs $50 to $200 per side. The ballast is the electronic module that powers the HID bulb... it's vehicle-specific and usually mounts near the headlight assembly. LED headlight modules are expensive to replace because they're often integrated into the headlight assembly. A failed LED element may require the entire assembly ($300-$1,000+), though some vehicles have replaceable LED modules. For headlight lens restoration, DIY kits ($15-$30) with sandpaper, polishing compound, and UV sealant work well and last 1-2 years. Professional restoration ($50-$150 per pair) uses professional-grade products and typically lasts 2-4 years. Permanent fix: PPF (paint protection film) applied after restoration prevents future yellowing. Full headlight assembly replacement ($100-$500 per side for aftermarket, $200-$1,000+ for OEM) makes sense when the lens is deeply deteriorated, the internal reflector is peeling, or the assembly has moisture damage (water inside the lens).
🔧 Repair if...
- • It's less than 1 years old
- • This is the first major issue
- • Repair cost is under $4 - $30
- • The rest of the unit is in good shape
🔄 Replace if...
- • It's past 2 years
- • This is the second or third repair
- • Repair quote is over $7 - $50
- • Newer models would save you money on energy
Replacement cost: A new headlights (halogen) typically costs $15 - $100 installed. Prices vary by region, brand, and complexity of installation.
Cost to Replace a Headlights (Halogen)
Full Replacement
$15 - $100
Labor is typically 30-50% of total cost
Typical Repair
$15 - $200
Depending on the issue and your location
Prices vary by region, brand, and complexity. Get at least 3 quotes before committing... and don't automatically go with the cheapest. A bad installation costs more in the long run.
Common Headlights (Halogen) Repairs and What They Cost
Headlights (Halogen) repair cost breakdown
| Repair | Typical Cost | Notes |
|---|---|---|
| Halogen bulb replacement (pair) | $15-$50 (DIY) / $50-$100 (shop) | Most common. 15-30 minutes DIY. Some cars require bumper removal for access. |
| HID bulb replacement (pair) | $50-$150 (DIY) / $100-$250 (shop) | Slightly more complex than halogen. Don't touch the glass. Replace in pairs. |
| HID ballast replacement | $100-$300 per side | Fixes flickering or non-starting HID headlights. Vehicle-specific part. |
| Headlight lens restoration | $15-$30 (DIY) / $50-$150 (pro) | Dramatic improvement for yellowed lenses. DIY kits work well with a drill. |
| Full headlight assembly replacement | $100-$500 per side (aftermarket) | For assemblies with moisture damage, peeling reflectors, or deeply degraded lenses. |
Best Headlights (Halogen) Brands
How Long Does It Take to Replace a Headlights (Halogen)?
Halogen bulb replacement takes 10 to 30 minutes on most vehicles. Open the hood, locate the bulb connector on the back of the headlight assembly, twist or unclip the retainer, pull the old bulb, insert the new one (without touching the glass), and secure. Some vehicles (certain BMWs, Audis, and newer trucks) require removing the front bumper or battery for access, which adds 30-60 minutes.
HID bulb replacement is similar but takes 15-45 minutes. The bulb base is different and may require removing the ballast cover. Handle HID bulbs with gloves... they contain xenon gas under pressure.
Headlight lens restoration takes 30-60 minutes per pair with a drill-mounted kit. Tape off the surrounding paint, sand with progressive grits, polish to clarity, and apply UV sealant. The UV sealant step is critical... without it, the lens yellows again in 3-6 months.
Full headlight assembly replacement takes 15-45 minutes per side. Most assemblies are held by 2-3 bolts and an electrical connector. The tricky part is aligning them properly after installation... you may need to adjust aim using the built-in adjustment screws.
How to Make It Last Longer
- ✓Replace halogen bulbs in pairs every 2-3 years proactively, even if they still work. Bulb output drops 20-30% before failure, and you won't notice the gradual dimming until you install fresh bulbs.
- ✓Clean headlight lenses with automotive plastic polish every 6 months to slow UV oxidation. A $10 bottle of plastic polish and 10 minutes of work extends lens clarity significantly.
- ✓Apply UV-protective clear coat or PPF (paint protection film) to headlight lenses. This prevents the yellowing that costs $50-$150 to fix later. New car owners should do this preventively.
- ✓Don't touch halogen bulb glass with bare fingers when installing. Oil from your skin creates hot spots on the glass that cause premature bulb failure. Use gloves or hold the base only.
- ✓Check headlight aim after bulb replacement or any front-end work. Misaimed headlights blind oncoming traffic and don't illuminate the road properly. Most auto parts stores can check aim for free.
What We Recommend
Products that help with headlights (halogen) maintenance and replacement.
Sylvania SilverStar Ultra Halogen Bulbs (pair)
The brightest road-legal halogen bulb available. Whiter light with better down-road visibility than standard bulbs. Replace in pairs for even lighting.
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3M Headlight Lens Restoration Kit
Complete kit to restore hazy, yellowed headlight lenses to like-new clarity. Includes sanding discs, polishing compound, and UV protectant. Attaches to a drill for easy use.
View on Amazon →
Philips CrystalVision Ultra Headlight Bulbs
OEM-quality halogen bulbs with a bright white appearance that mimics HID. Good balance of brightness, lifespan, and value. Available for most vehicle fitments.
View on Amazon →
Prices are approximate and may change. As an Amazon Associate we earn from qualifying purchases at no additional cost to you.
Related Guides
Lifespans and costs are averages based on industry data. Your results may vary based on brand, usage, climate, and maintenance. Consult a professional for specific advice.