Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam and Low Beam
This 2004 Mitsubishi Eclipse bulb guide helps you confirm the correct bulb size by lighting position before you buy replacements. Use it to match the headlight and fog light locations on your vehicle, since the right bulb can depend on whether you are looking at the high beam, low beam, or front fog light.
For this model year, the available bulb chart rows list the headlight high beam and low beam as 9003, and the front fog light as H1. That makes it easier to shop for the right bulbs and avoid ordering the wrong fit for your 2004 Mitsubishi Eclipse.
Fitment can vary by trim, lighting package, market, and body style, so it is smart to confirm what is actually installed on your car before purchasing. If your Eclipse has been modified, halogen-to-LED upgrades or aftermarket conversion kits may change the bulb setup, beam pattern, or connector needs. Always compare the bulb in the housing with the chart on this page, and check the old bulb before you order replacements to make sure the base type and size match.
The bulb chart on this page lists 9003 for the headlight high beam and low beam positions on the 2004 Mitsubishi Eclipse.
The front fog light bulb size listed for this model year is H1.
According to the bulb chart on this page, both the high beam and low beam headlight positions are listed as 9003.
Because different lighting positions on the same vehicle can use different bulb types, and the correct fit depends on whether you are replacing a headlight high beam, headlight low beam, or fog light.
Yes. Trim and lighting package can vary by market and body style, so the installed bulb may differ from one version of the 2004 Eclipse to another.
Yes. Checking the installed bulb is one of the best ways to confirm the exact fit, especially if the car has been modified or if you are not sure which lighting package it has.
Some owners do aftermarket halogen-to-LED conversions, but fitment, beam pattern, and connector compatibility can change. It is important to confirm that the replacement bulb is suitable for the housing and legal for road use in your area.
The base size may stay the same, but the lighting setup can change in practice. Aftermarket parts may require adapters, different mounting hardware, or additional checks for proper beam alignment.
Use the bulb size listed for the correct lighting position, handle the bulb carefully, and compare the new bulb to the old one before installation. This helps prevent fitment mistakes and lighting issues.
Differences in market, trim, body style, previous repairs, or aftermarket changes can cause a mismatch. That is why this page should be used as a guide, along with a quick check of the installed bulb.
No. The headlight bulbs and fog light bulbs serve different positions and use different bulb types, so they should not be swapped unless a specific lighting conversion has been designed for that purpose.
Stop and compare the old bulb, the socket, and the bulb chart for the correct lighting position. If the vehicle has been modified, you may need a different bulb type or an adapter that matches the installed setup.
