What is the low beam headlight bulb size for a 2018 Mazda 3?

The 2018 Mazda 3 uses a H11 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 2018 Mazda 3?

The high beam bulb size for the 2018 Mazda 3 is 9005 LED.

Why are my 2018 Mazda 3 headlights dim?

Dim headlights on a 2018 Mazda 3 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H11 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Mazda 3 fog light?

The 2018 Mazda 3 uses a LED Fog Light bulb for the fog light position.

Is the 2018 Mazda 3 single or dual beam?

The 2018 Mazda 3 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2018 Mazda 3?

Yes, the 2018 Mazda 3 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H11 LED LED conversion kit for the low beams.

Does the 2018 Mazda 3 have fog lights?

Yes, the 2018 Mazda 3 takes a LED Fog Light bulb for the fog light position.

How do I change the headlight on a 2018 Mazda 3?

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 H11 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 2018 Mazda 3?

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 H11 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 2018 Mazda 3 headlights?

A pair of halogen H11 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 2018 Mazda 3?

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 H11 LED position are available as direct plug-and-play replacements.

This vehicle is part of the 2017–2018 Mazda 3 generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2018 Mazda 3

What Size Bulbs Does a 2018 Mazda 3 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 2018 Mazda 3 Have?

When it comes to nighttime visibility, the 2018 Mazda 3 relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H11 LED low beam and 9005 LED high beam bulbs for precise light distribution. This model belongs to the mid years of the 3's 2004-2023 production span.

Can You Put LED Bulbs in a 2018 Mazda 3?

Upgrading to LED is one of the most effective ways to modernize your Mazda's appearance and safety profile. We recommend starting your upgrade with the H11 LED low beams, as they see the most use. Adding a matching 9005 LED LED kit later will complete the look and ensure consistent lighting performance. Don't forget the LED Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2018 Mazda 3 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H11 LED	Buy H11 LED →
High Beam	9005 LED	Buy 9005 LED →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	LED Bulb	Buy LED Bulb →
Side Marker	7443 LED	Buy 7443 LED →
Turn Signal Front	7440NA LED	Buy 7440NA LED →
Turn Signal Rear	7440NA LED	Buy 7440NA LED →
Dome Light	DE3175	Buy DE3175 →
License Plate	2825	Buy 2825 →
Map Light	DE3175	Buy DE3175 →
Parking Light	2827	Buy 2827 →
Reverse Light	7440 or 921	Buy 7440 or 921 →
Trunk Light	DE3022	Buy DE3022 →

Installation Guide

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