What Size Bulbs Does a 2003 Mitsubishi Lancer 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 2003 Mitsubishi Lancer Have?
The 2003 Mitsubishi Lancer features an extensive lighting system with 12 bulb positions. It uses halogen technology with a single 9007 LED dual-filament bulb handling both low and high beams. The Lancer has been available from 2002 to 2016, and the 2003 model falls in the early-generation years.
Can You Put LED Bulbs in a 2003 Mitsubishi Lancer?
Upgrading the 2003 Mitsubishi Lancer to LED headlights is straightforward since it uses a single 9007 LED dual-filament bulb for both low and high beams. You only need one pair of LED bulbs to upgrade both functions. Look for a 9007 LED LED kit that specifically supports dual-filament operation to ensure both beams work correctly. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 2003 Mitsubishi Lancer
The 9007 bulb uses a twist-lock base with a keyed tab for alignment identical to H13. To remove the old bulb, disconnect the wiring harness first, then twist the bulb counter-clockwise and pull it out. Older model years like the 2003 Lancer typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 minutes per side. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.
Full Upgrade Bundle
Upgrade All 12 Positions at Once
2003 Mitsubishi Lancer Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | 9007 LED | Buy 9007 LED |
High Beam | 9007 LED | Buy 9007 LED |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | 7506 LED | Buy 7506 LED |
Side Marker | 7443 LED | Buy 7443 LED |
Turn Signal Front | 2827 LED | Buy 2827 LED |
Turn Signal Rear | 12496 LED | Buy 12496 LED |
Dome Light | DE3175 | Buy DE3175 |
License Plate | 168 | Buy 168 |
Parking Light | 194NA | Buy 194NA |
Reverse Light | 921 | Buy 921 |
Trunk Light | DE3022 | Buy DE3022 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2003 Mitsubishi LancerHow Long Do 2003 Mitsubishi Lancer Headlight Bulbs Last?
Standard halogen headlights on the 2003 Mitsubishi Lancer have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 23 years old, the original bulbs on your Lancer are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 2003 Mitsubishi Lancer?
The 9007 low beam bulb on the 2003 Mitsubishi Lancer is cross-compatible with HB5 bulbs. These share the same physical base and electrical connection, so they will fit the socket. However, 9007 is the recommended size because it is optimized for the wattage and beam pattern designed into your headlight housing. The 9007 is a dual-filament bulb, meaning one bulb contains two separate filaments for low and high beams. This is a different design from single-filament bulbs like H11 or 9005. Make sure any LED replacement is specifically designed for dual-filament operation. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
2003 Mitsubishi Lancer Headlight FAQ
Did Mitsubishi Lancer Bulb Sizes Change Over the Years?
Over its production run from 2002 to 2016, the Mitsubishi Lancer has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 2003 model uses the earlier bulb specification that was in place before the change around 2015. Always verify the exact bulb size for your specific 2003 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other Lancer Years
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Other Vehicles That Use 9007 LED Bulbs
These vehicles from other makes also use a 9007 LED low beam bulb: