What is the low beam headlight bulb size for a 2009 Cadillac STS-V?

The 2009 Cadillac STS-V uses a HID-D1S LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2009 Cadillac STS-V?

The high beam bulb size for the 2009 Cadillac STS-V is 9005XS LED.

Why are my 2009 Cadillac STS-V headlights dim?

Dim headlights on a 2009 Cadillac STS-V can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D1S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2009 Cadillac STS-V fog light?

The 2009 Cadillac STS-V uses a H3 LED bulb for the fog light position.

Is the 2009 Cadillac STS-V single or dual beam?

The 2009 Cadillac STS-V uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2009 Cadillac STS-V?

Yes, the 2009 Cadillac STS-V comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D1S LED LED conversion kit for the low beams.

Does the 2009 Cadillac STS-V have fog lights?

Yes, the 2009 Cadillac STS-V takes a H3 LED bulb for the fog light position.

How do I change the headlight on a 2009 Cadillac STS-V?

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 HID-D1S LED 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 2009 Cadillac STS-V?

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 HID-D1S LED 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 2009 Cadillac STS-V headlights?

A pair of HID HID-D1S LED bulbs costs $50 to $150. 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 2009 Cadillac STS-V?

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 HID-D1S LED position are available as direct plug-and-play replacements.

This vehicle is part of the 2006–2009 Cadillac STS-V generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2009 Cadillac STS-V

What Size Bulbs Does a 2009 Cadillac STS-V Use?

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

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2009 Cadillac STS-V Have?

When it comes to nighttime visibility, the 2009 Cadillac STS-V relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D1S projector housings for high-intensity output. This model belongs to the late years of the STS-V's 2006-2009 production span.

Can You Put LED Bulbs in a 2009 Cadillac STS-V?

The 2009 Cadillac STS-V is already equipped with factory D1S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H3 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2009 Cadillac STS-V Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D1S LED	Buy HID-D1S LED →
High Beam	9005XS LED	Buy 9005XS LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	LED Bulb	Buy LED Bulb →
Side Marker	2825 LED	Buy 2825 LED →
Turn Signal Front	5702AK LED	Buy 5702AK LED →
Turn Signal Rear	LED Bulb	Buy LED Bulb →
Dome Light	212-2	Buy 212-2 →
License Plate	2825	Buy 2825 →
Map Light	PC175	Buy PC175 →
Parking Light	5702AK	Buy 5702AK →
Reverse Light	3157KX	Buy 3157KX →
Trunk Light	LED Light	Buy LED Light →

Installation Guide

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Other STS-V Years

2008 2007 2006

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