What is the low beam headlight bulb size for a 2004 Buick Century?

The 2004 Buick Century uses a 9006 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2004 Buick Century?

The high beam bulb size for the 2004 Buick Century is 9005.

Why are my 2004 Buick Century headlights dim?

Dim headlights on a 2004 Buick Century can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9006 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2004 Buick Century fog light?

The 2004 Buick Century 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 2004 Buick Century single or dual beam?

The 2004 Buick Century uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2004 Buick Century?

Yes, the 2004 Buick Century comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9006 LED conversion kit for the low beams.

Did the 2004 Buick Century change headlight bulb sizes from the previous year?

Yes — the 2004 Buick Century uses different bulb sizes than the 2003 model. The 2004 generation introduced this bulb configuration.

Is the 2004 Buick Century the first or last year to use 9006 bulbs?

The 2004 Buick Century is the only year in the 2004 generation to use the 9006 bulb for the low beam headlight.

How do I change the headlight on a 2004 Buick Century?

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 9006 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 2004 Buick Century?

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 9006 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 2004 Buick Century headlights?

A pair of halogen 9006 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 2004 Buick Century?

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 9006 position are available as direct plug-and-play replacements.

The 2004 Buick Century has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2004 Buick Century

What Size Bulbs Does a 2004 Buick Century 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 2004 Buick Century Have?

Lighting on the 2004 Buick Century is managed by a total of 12 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9006 low beam and 9005 high beam bulbs for precise light distribution. This model belongs to the late years of the Century's 1958-2005 production span.

Can You Put LED Bulbs in a 2004 Buick Century?

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 9006 low beams, as they see the most use. Adding a matching 9005 LED kit later will complete the look and ensure consistent lighting performance.

2004 Buick Century Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	3157CK	Buy 3157CK →
Side Marker	194	Buy 194 →
Low Beam	9006	Buy 9006 →
High Beam	9005	Buy 9005 →
Brake Light	3057	Buy 3057 →
Tail Light	3057	Buy 3057 →
Turn Signal Rear	3057	Buy 3057 →
Parking Light	3157CK	Buy 3157CK →
License Plate	194	Buy 194 →
Reverse Light	1156	Buy 1156 →
Trunk Light	920	Buy 920 →
Dome Light	906	Buy 906 →

How do the 2004 Buick Century's bulbs compare to other years?

The 2004 Buick Century changed bulb sizes from 2003. The previous model year used a different configuration.

The 2005 model switched to a different bulb configuration.

This bulb configuration covers the 2004 model years. ← 2003 2005 →

Finding the best installation guide...

Other Century Years

2005 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1958

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9006 Comparisons

9005 vs 9006 9006 vs H11 9006 vs HB4