What is the low beam headlight bulb size for a 2004 Mazda 6?

The 2004 Mazda 6 uses a H1 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 2004 Mazda 6?

The high beam bulb size for the 2004 Mazda 6 is H1 LED.

Why are my 2004 Mazda 6 headlights dim?

Dim headlights on a 2004 Mazda 6 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H1 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2004 Mazda 6 fog light?

The 2004 Mazda 6 uses a H3 LED bulb for the fog light position.

Is the 2004 Mazda 6 single or dual beam?

The 2004 Mazda 6 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 2004 Mazda 6?

Yes, the 2004 Mazda 6 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H1 LED LED conversion kit for the low beams.

Does the 2004 Mazda 6 have fog lights?

Yes, the 2004 Mazda 6 takes a H3 LED bulb for the fog light position.

How do I change the headlight on a 2004 Mazda 6?

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 H1 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 2004 Mazda 6?

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 H1 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 2004 Mazda 6 headlights?

A pair of halogen H1 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 2004 Mazda 6?

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 H1 LED position are available as direct plug-and-play replacements.

This vehicle is part of the 2003–2004 Mazda 6 generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2004 Mazda 6

What Size Bulbs Does a 2004 Mazda 6 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 Mazda 6 Have?

When it comes to nighttime visibility, the 2004 Mazda 6 relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by a halogen-based setup where a single H1 LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the early years of the 6's 2003-2021 production span.

Can You Put LED Bulbs in a 2004 Mazda 6?

Upgrading to LED is one of the most effective ways to modernize your Mazda's appearance and safety profile. Since your 6 uses a single H1 LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H3 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2004 Mazda 6 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H1 LED	Buy H1 LED →
High Beam	H1 LED	Buy H1 LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	194 or 921 LED	Buy 194 or 921 LED →
Side Marker	2825 LED	Buy 2825 LED →
Turn Signal Front	2357A LED	Buy 2357A LED →
Turn Signal Rear	7440NA LED	Buy 7440NA LED →
Dome Light	2825	Buy 2825 →
License Plate	2825	Buy 2825 →
Map Light	2825	Buy 2825 →
Parking Light	2825 or 2357A	Buy 2825 or 2357A →
Reverse Light	921	Buy 921 →
Trunk Light	2821	Buy 2821 →

Installation Guide

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