What is the low beam headlight bulb size for a 2011 Buick Regal?

The 2011 Buick Regal 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 2011 Buick Regal?

The high beam bulb size for the 2011 Buick Regal is HID-D1S LED.

Why are my 2011 Buick Regal headlights dim?

Dim headlights on a 2011 Buick Regal 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 2011 Buick Regal fog light?

The 2011 Buick Regal uses a 9145 LED bulb for the fog light position.

Is the 2011 Buick Regal single or dual beam?

The 2011 Buick Regal uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2011 Buick Regal?

Yes, the 2011 Buick Regal 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 2011 Buick Regal have fog lights?

Yes, the 2011 Buick Regal takes a 9145 LED bulb for the fog light position.

Did the 2011 Buick Regal change headlight bulb sizes from the previous year?

Yes — the 2011 Buick Regal uses different bulb sizes than the 2004 model. The 2011 generation introduced this bulb configuration.

Is the 2011 Buick Regal the first or last year to use HID-D1S LED bulbs?

The 2011 Buick Regal is the only year in the 2011 generation to use the HID-D1S LED bulb for the low beam headlight.

How do I change the headlight on a 2011 Buick Regal?

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 2011 Buick Regal?

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 2011 Buick Regal 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 2011 Buick Regal?

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.

The 2011 Buick Regal has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2011 Buick Regal

What Size Bulbs Does a 2011 Buick Regal 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 2011 Buick Regal Have?

Owners of the 2011 Buick Regal will find a total of 15 lighting elements throughout the vehicle's exterior. 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 Regal's 1973-2017 production span.

Can You Put LED Bulbs in a 2011 Buick Regal?

The 2011 Buick Regal 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 9145 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2011 Buick Regal Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D1S LED	Buy HID-D1S LED →
High Beam	HID-D1S LED	Buy HID-D1S LED →
Fog Light	9145 LED	Buy 9145 LED →
Brake Light	3157CK	Buy 3157CK →
Side Marker	3157K LED or 4114K LED	Buy 3157K LED or 4114K LED →
Turn Signal Front	4157NA LED or 3457NA LED	Buy 4157NA LED or 3457NA LED →
Turn Signal Rear	3157K LED or 3757AK LED	Buy 3157K LED or 3757AK LED →
Dome Light	2825	Buy 2825 →
License Plate	2825	Buy 2825 →
Map Light	2825	Buy 2825 →
Parking Light	4157NA or 3457NA	Buy 4157NA or 3457NA →
Reverse Light	3157K or 4114K	Buy 3157K or 4114K →
Trunk Light	LED Light	Buy LED Light →
Daytime Running	H11	Buy H11 →
Tail Light	3157	Buy 3157 →

How do the 2011 Buick Regal's bulbs compare to other years?

The 2011 Buick Regal changed bulb sizes from 2004. The previous model year used a different configuration.

The 2012 model switched to a different bulb configuration.

This bulb configuration covers the 2011 model years. ← 2004 2012 →

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Other Regal Years

2017 2016 2015 2014 2013 2012 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973

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