Buick Regal 2004 Bulb Size
Bulb size chart
This 2004 Buick Regal bulb size page is designed to help you quickly verify the correct bulb by lighting position, so you can match the right part before you buy. Whether you are replacing an exterior lamp or a small interior bulb, the goal is to make fitment easier for the Regal’s headlights, tail lights, courtesy lights, and dashboard lighting.
The 2004 Buick Regal can use different bulbs depending on trim, body style, and lighting package, so it is smart to confirm the socket and position before ordering. This page organizes the common bulb sizes for the Regal by location, including high beam, brake light, reverse light, license plate light, dome light, and other service points around the car.
For best results, compare the bulb in your vehicle to the listed size before purchase, especially if your Regal has had previous repairs or aftermarket parts installed. Trim and package differences can change fitment, and halogen-to-LED upgrades may require additional checks for beam pattern, polarity, or compatibility with the original housing. If you are converting to LED or using an aftermarket replacement, make sure the bulb base, length, and connector style match the original application, and always verify the installed bulb number before buying a full set.
FAQ
What bulb size does the 2004 Buick Regal use for the high beam headlight?
The listed high beam headlight bulb size for the 2004 Buick Regal is 9005.
What is the brake light bulb size on a 2004 Buick Regal?
The brake light bulb size listed for the 2004 Buick Regal is 3057R.
What bulb fits the rear tail light on this Regal?
The outer tail light bulb is listed as 3057R, while the inner tail light bulb is listed as 194 or 7441.
What size is the front turn signal bulb?
The front turn signal bulb size listed for the 2004 Buick Regal is 4157NA.
What bulb is used for the rear turn signal?
The rear turn signal bulb size listed for the 2004 Buick Regal is 3057.
What is the reverse light bulb size?
The back up reverse light bulb size listed for this model is 1156.
What bulb does the license plate light use?
The license plate light bulb size listed for the 2004 Buick Regal is 194 or 7441.
What size is the dome light bulb?
The dome light bulb size listed for the 2004 Buick Regal is 906.
What bulb fits the fog light on the front?
The front fog light bulb size listed is 893, and it is noted as optional.
Are there different courtesy light bulb options on this page?
Yes. The page lists courtesy light bulb options as 168 or 917 for one application and 2721 for another, so checking the installed bulb is important.
Why do some bulb positions show more than one possible size?
Some positions can vary by trim, market, or body style, so the same 2004 Buick Regal may use different bulbs in different lighting locations or configurations.
Can I replace these bulbs with LED bulbs?
Yes, many owners upgrade to LED, but you should confirm fitment, polarity, and housing compatibility first. Some positions may need a specific LED replacement or an adapter to work correctly.
What bulb is used for the center high mount stop light?
The center high mount stop light bulb size listed for the 2004 Buick Regal is 921.
What is the instrument panel bulb size?
The instrument panel light bulb size listed is PC74.