Buick Century Regal Headlight Pair - 1ALHP00078

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

Part Details

  • Quantity:   Pair


  • Comes as a PAIR
    • Fits both LH (Driver Side) & RH (Passenger Side)
  • Include lenses and housings
  • Replaces dealer part numbers: 10319776, 10319777
  • Correct for both models with or without cornering lamps
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

Attention 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 (0:44)
    • 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 headlight assembly (0:45)
    • Pull up and remove the two anchor tabs.
    • Pull out the headlight assembly.
    • Unplug the harness.
    • You can access the bulbs and replace them from here if needed.
  3. step : Install headlight assembly (1:30)
    • Plug in the harness.
    • Put the headlight assembly back into place.
    • Clip it in with the two anchor tabs.
    • Close the hood and enjoy your new 1A Auto headlights.

Tools needed for replacement:

    1A - No Tools Needed

  • No Tools Needed

4.65/ 5.0
23 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Nice lights
Easy to install and they look great, car looks new again.
October 16, 2016
1999 Buick Century headlamps, replacement of
I could hardly believe how simple it was to disconnect the old lamb and install the new. No tools needed.
October 16, 2016
Good and bad.
Came with missing caps on the one side. I wanted to upgrade to LED headlights which fit in my Buick original but not these.
January 23, 2017
Great service good headlight set. Cant believe order arrived so quickly
March 22, 2017
2002 Buick headlights
Thanks 1A Auto I received my new headlights in 3 days and the installation only took about 15 minutes. The alignment for the lights was done that evening and took about 20 minutes. They look great and driving at night is a lot easier. Dale G.
April 15, 2017
The headlight assembly would have been nice but it was broke on the inside of it so it ended up costing me more to have it fixed
April 21, 2017
So easy
The headlights I got from 1aauto were a perfect fit and so easy to install. 5 minutes and no tools needed! Thanks!
May 1, 2017
My New Headlights
I LOVE my new headlights!!! I can now see at night. I had no idea the difference they would make. AND they make my old car look great! They were very easy to install, about 15 minutes from box to car. Done! WOW!!! Thank you for a wonderful product and a great price!!! Yvonne
August 1, 2017
Head light assemblies
I was surprised with the quality of the replacement parts. Parts are accurate and precise for my Buick Century. Adjustment was easy to do from videos and common sence.
August 6, 2017
Perfect Headlights
Have purchased auto parts from 1A for multiple vehicles. great service and and first class parts! Solon Dunn
August 22, 2017
The installation of the two headlights was very simple and easy. All it took was pulling two holding clips on each lamp assembly and putting the new set into its place and inserting the two clips. That simple.
October 3, 2017
Great looking headlights.
Great looking headlights. they even have side turning lights that my old lights did not have. Fast delivery, well packaged.
November 15, 2017
Thank you ! Nice headlamps lights and i received just on time to use my car
November 19, 2017
retaining clips
really did not need them but I am going to keep them just in case
December 22, 2017
As expected
I got my order pretty quick, no hassles or payment issues. So far they work great.
January 15, 2018
Replacing headlight assembly
I Ordered the headlights over the phone for my 1999 Buick. I was confident she helped order the right lights. Video made it easy to remove and replace the old lights. I was proud of A-1 Auto and myself.
January 27, 2018
Awesome and reasonable
Got the pair complete left and right assemblies for our 2000 Buick Century Custom. Easy to Install and clear. Great lights now. By the way these come with all bulbs already insralled. If you replaced your dim and bright and turn bulbs separately you would pay more. This way you have it all. Items came fast
January 30, 2018
2000 buick regal headlight assemblies
The product arrived exactly as described on the web site. After about fifteen minutes I had both headlights installed and they worked great. Installation would have been even quicker if the one mounting flange wasnt bent. I would recommend buying these.
March 12, 2018
Great job on those headlights
I totally impressed my family when I showed them my newly acquired “mechanical skill� by installing the new headlights on our old 1999 Buick. Couldn’t have been so brave without the video however!! Makes the car feel like new!
April 30, 2018
Headlight purchase
The sales rep was very helpful and made my purchase Swift and easy. I have not had the headlights applied yet. Hopefully today
May 13, 2018
perfect fit
headlight assembly was exact fit. took longer to unpack than replace!
May 16, 2018
1999 Buick Regal LS headlight installation
I watched the video for removing and installing the headlights , it was jest as easy as the video showed I had both installed and working in about fifteen minutes , with no tools and they fit perfect and look awesome on my 19 year old Buick , I would highly recommend 1A Auto
September 12, 2018
Perfect Fit, Great Product
I ordered these based on the how-to video and they were easy to install and worked perfectly. The car looks 100% better and the visibility at night is excellent. You will not be disappointed by these headlamps or the customer service at 1A Auto.
November 17, 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
Does It Come With Bulbs?
Thad E October 16, 2016
Yes it does
Richard B October 16, 2016
The headlights I received came complete with all the bulbs
Ian Y October 16, 2016
Paul A October 16, 2016
Yes. Ready to install.
Luis R October 16, 2016
Palmer C October 16, 2016
Yes it did and this is a very good service
Mark B October 16, 2016
Ted L October 17, 2016
Rick K October 18, 2016
test bulbs usually installed but recommend replacing them before installing into your car.
Brian F October 18, 2016
Robert D November 15, 2017
Does these lights come with wiring and connectors for bulbs all ready inside the housing?
Clay M September 25, 2018
New light bulbs are not included. Occasionally, manufacturers leave test bulbs in the lights. If you receive test bulbs, replace them with your original bulbs or with new bulbs.
Tim K September 26, 2018
Every thing u need is there very simple to replace
JOE M September 27, 2018
NO The Wires do fit the new bulbs without alot of fuss.
Richard D September 29, 2018
No ,you will use your existing wires and bulbs. Installation was quick and easy.
Dale G October 1, 2018
Anthony M October 4, 2018
Year Make Model Description
1997-2005Buick Century Buick Century Headlight Pair
1997-2004Buick Regal Buick Regal Headlight Pair
Part #: 1ALHP00078

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:

(02:16 min)