What is the low beam headlight bulb size for a 2017 Buick LaCrosse?

The 2017 Buick LaCrosse 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 2017 Buick LaCrosse?

The high beam bulb size for the 2017 Buick LaCrosse is N/A.

Why are my 2017 Buick LaCrosse headlights dim?

Dim headlights on a 2017 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 N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2017 Buick LaCrosse fog light?

The 2017 Buick LaCrosse uses a H11 bulb for the fog light position.

Is the 2017 Buick LaCrosse single or dual beam?

The 2017 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 2017 Buick LaCrosse?

Yes, the 2017 Buick LaCrosse 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.

Does the 2017 Buick LaCrosse have fog lights?

Yes, the 2017 Buick LaCrosse takes a H11 bulb for the fog light position.

Did the 2017 Buick LaCrosse change headlight bulb sizes from the previous year?

Yes — the 2017 Buick LaCrosse uses different bulb sizes than the 2016 model. The 2017 generation introduced this bulb configuration.

Is the 2017 Buick LaCrosse the first or last year to use N/A bulbs?

The 2017 Buick LaCrosse is the only year in the 2017 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2017 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 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 2017 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 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 2017 Buick LaCrosse 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 2017 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 N/A position are available as direct plug-and-play replacements.

The 2017 Buick LaCrosse has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2017 Buick LaCrosse

What Size Bulbs Does a 2017 Buick LaCrosse Use?

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

Installation Difficulty

Moderate (Dust covers often present)

Est. Replacement Cost

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

What Lighting System Does the 2017 Buick LaCrosse Have?

Lighting on the 2017 Buick LaCrosse is managed by a total of 5 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 late years of the LaCrosse's 2005-2019 production span.

Can You Put LED Bulbs in a 2017 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 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance. Don't forget the H11 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2017 Buick LaCrosse Bulb Size Chart

Position	Bulb Size	Shop
Fog Light	H11	Buy H11 →
Turn Signal Rear	7440	Buy 7440 →
License Plate	W5W	Buy W5W →
Reverse Light	921	Buy 921 →
Brake Light	7440	Buy 7440 →

How do the 2017 Buick LaCrosse's bulbs compare to other years?

The 2017 Buick LaCrosse changed bulb sizes from 2016. The previous model year used a different configuration.

The 2018 model switched to a different bulb configuration.

This bulb configuration covers the 2017 model years. ← 2016 2018 →

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Other LaCrosse Years

2019 2018 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005