Part Details

  • Light Option: Halogen


  • RH (Passenger Side)
  • For vehicles without auto-leveling and headlight washer
  • Includes lens, housing, and mounting panel
  • Bulbs not included
  • Replacement for Non HID (High Intensity Discharge) Headlight

Fit guaranteed

  • This headlamp will install just as your original does. 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 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 a discolored, scratched, dull or damaged headlight with a headlight from 1A Auto can increase your resale value by up to 10%.


  • A new headlight 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 headlight 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

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:

Unless otherwise noted, our lights do not include bulbs, though occasionally lighting manufacturers do include bulbs in the lights. If you happen to receive a lighting product (Headlight, Tail light, parking light, fog light etc.) that comes with the bulbs, the bulbs are not covered under our warranty. Our warranty applies only to the light assembly..

  1. step : Removing the Bumper Cover (1:09)
    • Remove the top eight clips starting with the center
    • Leave a couple pins without the centers in (One on each side)
    • On each side separate the inner fender from the bumper cover
    • Remove the 10 mm bolt on each side of the car
    • Remove the 10 mm nuts from each side
    • Remove the marker light by squeezing the pins on the back
    • Then use the hole to remove the 10 mm nut further back from the one previously removed
    • Remove the pins from the top that were left in. And carefully remove the bumper cover
    • Disconnect the fog and parking light wires
  2. step : Removing the Headlight (5:17)
    • Remove the trim plug with pliers and push it to the side
    • Remove the two 10 mm bolts and one nut securing the headlight
    • Disconnect the connector
    • Put the ball socket back in to the fender if it falls out
  3. step : Replacing a Bulb (6:17)
    • Twist the cap counter clockwise
    • Twist the socket counter clockwise
    • Pull the bulb out and replace it
    • Use a rag to make sure there is no oil from your hand on the bulb
  4. step : Reinstalling the Light and Bumper Cover (7:12)
    • Reattach the wires to the light
    • Line up the light and connect it to the body of the car
    • Replace the nut and bolts to secure the headlight
    • Reinstall the trim plug holding the flap in place
    • Line up the bumper cover and connect two pins on the top to hold it in place
    • Reconnect the fog and parking lights
    • Slide the panel into place
    • Tighten the nuts and bolts behind the fenders
    • Replace the marker light
    • Tighten the 10 mm bolts in the wheel wells
    • Tighten the bolts under the bumper
    • Reinsert the clips along the top of the bumper cover

Tools needed for replacement:

    General Tools

  • Flashlight

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket

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Vehicle Fit

Year Make Model Description
2003-2007Cadillac CTS Cadillac CTS Halogen Headlight Passenger Side

This part replaces:

  • Partslink GM2503242
  • Hollander 114-00708R
  • TYC 20-6715-00-1
  • DEPO 332-11A9R-AF2
  • OE # 15826014
Part #: 1ALHL01178

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:

(13:41 min)