Warranty & Shipping
How-To & Tools
Product Reviews
Vehicle Fit

Part Details

  • Quantity:   Pair
  • Light Option:   Smoked Style


  • LH driver and RH passenger side
  • Smoked look
  • Includes lens, housing, and mounting panel
  • Includes integrated parking/marker lamp
  • Does not include bulbs or wiring
  • Correct for 01-04 models, but will fit 99-00 models
Fit guaranteed
  • This pair of headlamps will install just as your originals do. You can use your existing hardware and wiring harnesses.
  • Save time and money with a direct fit. No trips to the hardware store or extra time trying to get the wiring to hookup.
  • 1A Auto has the most comprehensive warranty.
  • If this headlight set should fail to provide satisfactory performance you may exchange it.
  • 1A Auto Headlights are guaranteed to pass inspections in all 50 states. DOT (U.S. Dept. of Transportation) and SAE (Society of Automotive Engineers) approved.
  • Replacing discolored, scratched, dull or damaged headlights with a new pair from 1A Auto can increase your resale value by up to 10%.
  • A new pair of headlights can provide you with up to 50% more illumination than a dull, yellowed, sandblasted, broken or scratched headlight.
    • 1A Auto headlights can help you see farther at night and in poor driving conditions.
    • A new pair of headlights from 1A Auto can make you more visible to other traffic during heavy rain or wintry weather.
Direct Fit Replacement

Direct fit replacement for OEM assembly

Trouble-free Installation

Uses same wiring as original assembly.  No cutting or splicing required.

DOT and SAE Compliant

Meets federal regulations for on-road use

Item Condition: New

California Customers:

WARNING:  This product can expose you to chemicals including Chromium (Hexavalent Compounds), which is known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

Bulb Note:

These lights do not include bulbs.  If you happen to receive a product with bulbs, the bulbs are for testing and not covered under our warranty.  Our warranty applies to the light assembly only.

  1. step : Handling the Bulbs (0:58)
    • Note: DO NOT TOUCH the bulbs- the oil from your fingers will burn into the light and foul your bulb.
    • Clean with rubbing alcohol and a soft cloth if the bulbs do get touched.
  2. step : Remove the old headlight assembly (1:00)
    • Pull the tabs anchoring the headlight assembly
    • Put a cloth down on the bumper to protect your paint.
    • Pull out your headlight assembly.
    • Unplug the harness and bulbs.
  3. step : Install the new headlight assembly (3:05)
    • Plug in the bulbs and the harness
    • Using a rag to protect your paint, put the headlight assembly into its mounting.
    • Anchor the headlight assembly with the two tabs.

Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Cloth Rags

4.75/ 5.0
4 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
2004 Mustang Headlamps
Watched video and ordered parts and was delighted with quality of the new assemblies. Perfect fit, massive difference to appearance of car and was pleasantly surprised to see that bulbs were already fitted . Very happy to have bought from 1A Auto
August 14, 2017
Excellent! But..
Got my headlights quick and they made my mustang look 5 years newer. Very easy to install. They even came with new headlight bulbs in them! Only problem was one of the headlight bulbs didn’t work, so that was a bummer, but other than that, no complaints! Thanks 1aAuto!
November 6, 2017
Good product always recommend your store continue given top service and selling quality products
February 20, 2018
Headlights review
The headlights arrived on time and fit perfectly. They were exactly as advertised. Installation went smoothly. Thanks for completing my order promptly. The smoke color looks great on the car.
September 3, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Do the headlights have vertical and horizontal adjustments?
Jody G February 16, 2016
Has vertical adjustments only. Its all you need.
Anthony B February 16, 2016
No. My 99 GT didnt.
Justin B February 16, 2016
Hello, These have vertical adjustments like the OEM.
Brian F February 16, 2016
The adjustment on 02 Mustangs is vertical only. Look at the shop manual as to how to set the adjustment.
Stanley A February 16, 2016
I could only find the vertical adjustment on my 2000 GT. The adjustment is not part of the headlight it is part of the assembly that the headlight mounts to.
Gregory M February 16, 2016
Things Needed Allen wrench Tape Tape measure Step 1 Park your 1999 Mustang directly in front of a garage door or other vertical surface, turn off the vehicle and prop open the hood. Step 2 Place a vertical and horizontal strip of tape on the wall in front of the center of each headlight. These strips are marker "crosses" to target the aim of your headlights. Step 3 Measure 20 feet away from the vertical surface that your Mustang is parked in front of and place a strip of tape at that point. Reverse your Mustang until the headlights are directly over the tape on the ground. Park, turn on your headlights and prop open your hood. Step 4 Look for the small, black adjustment screw on the inner side of the headlight assembly, near the grille. Step 5 Insert your Allen wrench into the adjustment screw and twist it clockwise to aim the beam downward and counterclockwise to aim it upward. Aim your headlights so that they hit about 2 inches below and inward of the corresponding cross mark of tape on the wall.
Joseph B February 16, 2016
Year Make Model Description
1999-2004Ford Mustang Ford Mustang Headlight Smoked Style Pair
Part #: 1ALHP00019

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(04:29 min)