What is the low beam headlight bulb size for a 2009 Buick LaCrosse?

The 2009 Buick LaCrosse uses a H11 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 Buick LaCrosse?

The high beam bulb size for the 2009 Buick LaCrosse is H9 LED.

Why are my 2009 Buick LaCrosse headlights dim?

Dim headlights on a 2009 Buick LaCrosse can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H11 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2009 Buick LaCrosse fog light?

The 2009 Buick LaCrosse uses a H11 LED bulb for the fog light position.

Is the 2009 Buick LaCrosse single or dual beam?

The 2009 Buick LaCrosse 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 Buick LaCrosse?

Yes, the 2009 Buick LaCrosse comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H11 LED LED conversion kit for the low beams.

Does the 2009 Buick LaCrosse have fog lights?

Yes, the 2009 Buick LaCrosse takes a H11 LED bulb for the fog light position.

Did the 2009 Buick LaCrosse change headlight bulb sizes from the previous year?

No — the 2009 Buick LaCrosse uses the same bulb sizes as the 2008 model. This configuration has been consistent across the 2007–2009 generation.

Is the 2009 Buick LaCrosse the first or last year to use H11 LED bulbs?

The 2009 Buick LaCrosse is the last year in the 2007–2009 generation to use the H11 LED bulb for the low beam headlight.

How do I change the headlight on a 2009 Buick LaCrosse?

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 H11 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 Buick LaCrosse?

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 H11 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 Buick LaCrosse headlights?

A pair of halogen H11 LED 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 2009 Buick LaCrosse?

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 H11 LED position are available as direct plug-and-play replacements.

The 2009 Buick LaCrosse is the last model year to use this bulb configuration (2007–2009).

Fitment Guaranteed for 2009 Buick LaCrosse

What Size Bulbs Does a 2009 Buick LaCrosse 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 2009 Buick LaCrosse Have?

When it comes to nighttime visibility, the 2009 Buick LaCrosse relies on an arrangement of 15 specialized bulbs. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H11 LED low beam and H9 LED high beam bulbs for precise light distribution. This model belongs to the mid years of the LaCrosse's 2005-2019 production span.

Can You Put LED Bulbs in a 2009 Buick LaCrosse?

Upgrading to LED is one of the most effective ways to modernize your Buick's appearance and safety profile. We recommend starting your upgrade with the H11 LED low beams, as they see the most use. Adding a matching H9 LED LED kit later will complete the look and ensure consistent lighting performance. Don't forget the H11 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2009 Buick LaCrosse Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H11 LED	Buy H11 LED →
High Beam	H9 LED	Buy H9 LED →
Fog Light	H11 LED	Buy H11 LED →
Brake Light	3157CK	Buy 3157CK →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	4157NA LED	Buy 4157NA LED →
Turn Signal Rear	3057 LED	Buy 3057 LED →
Dome Light	168	Buy 168 →
License Plate	194	Buy 194 →
Parking Light	4157NA	Buy 4157NA →
Reverse Light	921	Buy 921 →
Trunk Light	912	Buy 912 →
Daytime Running	H11	Buy H11 →
Tail Light	194	Buy 194 →
Map Light	168	Buy 168 →

How do the 2009 Buick LaCrosse's bulbs compare to other years?

The 2009 Buick LaCrosse uses the same bulbs as the 2008 model.

The 2010 model switched to a different bulb configuration.

This bulb configuration covers the 2007–2009 model years. ← 2008 2010 →

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Other LaCrosse Years

2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2008 2007 2006 2005

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