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2008 Cadillac XLR Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.
Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

2008 Cadillac XLR Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Low BeamD1S—Factory HID packageHIDHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

AmazoneBay
High BeamD1S—Factory HID packageHIDHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

AmazoneBay
Fog Light9045—If equipped / package-dependentHalogenHigh
Pending

If equipped; fog light packages can vary by trim.

Amazon
Turn Signal Front3757AK—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
License Plate2825—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Map Light212-2—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Parking Light2825—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Reverse Light3156—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Trunk LightPC168—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Side MarkerW5W—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Daytime Running3157CK—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon

2008 Cadillac XLR Fitment Notes

Across the 2004-2009 production range, our database shows changes in the listed Fog Light, Parking Light positions. Use the chart above for this 2008 model, then confirm the bulb number in your vehicle before buying.

Known fitment limitations

  • factory HID or LED packages may use different parts
  • fog lights may depend on equipment package
  • aftermarket headlight assemblies may use different bulbs
  • regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 2008 Cadillac XLR's bulbs compare to other years?

The 2008 Cadillac XLR changed bulb sizes from 2007. The previous model year used a different configuration.

The 2009 model switched to a different bulb configuration.

This bulb configuration covers the 2008 model years. ← 2007 2009 →

Finding the best installation guide...

Other XLR Years

20092007200620052004

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Frequently Asked Questions

Our database lists D1S for the 2008 Cadillac XLR low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists D1S for the 2008 Cadillac XLR high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2008 Cadillac XLR can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed D1S size against the bulb in the housing before choosing a replacement or upgrade.

Our database lists 9045 for the 2008 Cadillac XLR fog light position. Fog lights are often package-dependent, so verify that your vehicle is equipped with factory fog lights before ordering.

The 2008 Cadillac XLR uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many D1S applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as D1S, and verify the factory housing before buying.

Our database has a fog light entry for the 2008 Cadillac XLR: 9045. Fog lights may still depend on trim or equipment package.

Yes — the 2008 Cadillac XLR uses different bulb sizes than the 2007 model. The 2008 generation introduced this bulb configuration.

The 2008 Cadillac XLR is the only year in the 2008 generation to use the D1S bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed D1S low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. HID D1S capsules usually cost more than common halogen bulbs. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 2008 Cadillac XLR.