What is the low beam headlight bulb size for a 2015 Cadillac XTS?

The 2015 Cadillac XTS uses a N/A bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2015 Cadillac XTS?

The high beam bulb size for the 2015 Cadillac XTS is N/A.

Why are my 2015 Cadillac XTS headlights dim?

Dim headlights on a 2015 Cadillac XTS can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2015 Cadillac XTS fog light?

The 2015 Cadillac XTS typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2015 Cadillac XTS single or dual beam?

The 2015 Cadillac XTS uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2015 Cadillac XTS?

Yes, the 2015 Cadillac XTS comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Did the 2015 Cadillac XTS change headlight bulb sizes from the previous year?

Yes — the 2015 Cadillac XTS uses different bulb sizes than the 2014 model. The 2015 generation introduced this bulb configuration.

Is the 2015 Cadillac XTS the first or last year to use N/A bulbs?

The 2015 Cadillac XTS is the only year in the 2015 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2015 Cadillac XTS?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old N/A bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2015 Cadillac XTS?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved N/A LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2015 Cadillac XTS headlights?

A pair of halogen N/A bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2015 Cadillac XTS?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the N/A position are available as direct plug-and-play replacements.

The 2015 Cadillac XTS has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2015 Cadillac XTS

What Size Bulbs Does a 2015 Cadillac XTS Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2015 Cadillac XTS Have?

Lighting on the 2015 Cadillac XTS is managed by a total of 6 bulbs, covering everything from primary headlights to signal indicators. It features a standard lighting system powered by a dual-bulb halogen configuration using separate low beam and high beam bulbs for precise light distribution. This model belongs to the mid years of the XTS's 2013-2019 production span.

Can You Put LED Bulbs in a 2015 Cadillac XTS?

Upgrading to LED is one of the most effective ways to modernize your Cadillac's appearance and safety profile. We recommend starting your upgrade with the low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance.

2015 Cadillac XTS Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	7443CK	Buy 7443CK →
Side Marker	194	Buy 194 →
Reverse Light	921	Buy 921 →
License Plate	W5W	Buy W5W →
Parking Light	7443CK	Buy 7443CK →
Door Light	W5W	Buy W5W →

How do the 2015 Cadillac XTS's bulbs compare to other years?

The 2015 Cadillac XTS changed bulb sizes from 2014. The previous model year used a different configuration.

The 2016 model switched to a different bulb configuration.

This bulb configuration covers the 2015 model years. ← 2014 2016 →

Finding the best installation guide...

Other XTS Years

2019 2018 2017 2016 2014 2013

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