What is the low beam headlight bulb size for a 2003 Mitsubishi Montero?

The 2003 Mitsubishi Montero uses a H4 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2003 Mitsubishi Montero?

The high beam bulb size for the 2003 Mitsubishi Montero is N/A.

Why are my 2003 Mitsubishi Montero headlights dim?

Dim headlights on a 2003 Mitsubishi Montero can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H4 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2003 Mitsubishi Montero fog light?

The 2003 Mitsubishi Montero uses a 9006 bulb for the fog light position.

Is the 2003 Mitsubishi Montero single or dual beam?

The 2003 Mitsubishi Montero uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2003 Mitsubishi Montero?

Yes, the 2003 Mitsubishi Montero comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H4 LED conversion kit for the low beams.

Does the 2003 Mitsubishi Montero have fog lights?

Yes, the 2003 Mitsubishi Montero takes a 9006 bulb for the fog light position.

Did the 2003 Mitsubishi Montero change headlight bulb sizes from the previous year?

Yes — the 2003 Mitsubishi Montero uses different bulb sizes than the 2002 model. The 2003 generation introduced this bulb configuration.

Is the 2003 Mitsubishi Montero the first or last year to use H4 bulbs?

The 2003 Mitsubishi Montero is the only year in the 2003 generation to use the H4 bulb for the low beam headlight.

How do I change the headlight on a 2003 Mitsubishi Montero?

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 H4 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 2003 Mitsubishi Montero?

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 H4 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 2003 Mitsubishi Montero headlights?

A pair of halogen H4 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 2003 Mitsubishi Montero?

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 H4 position are available as direct plug-and-play replacements.

The 2003 Mitsubishi Montero has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2003 Mitsubishi Montero

What Size Bulbs Does a 2003 Mitsubishi Montero 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 Montero Have?

The 2003 Mitsubishi Montero utilizes a refined lighting configuration featuring 11 distinct bulb positions. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H4 low beam and high beam bulbs for precise light distribution. This model belongs to the late years of the Montero's 1983-2006 production span.

Can You Put LED Bulbs in a 2003 Mitsubishi Montero?

Upgrading to LED is one of the most effective ways to modernize your Mitsubishi's appearance and safety profile. We recommend starting your upgrade with the H4 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance. Don't forget the 9006 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2003 Mitsubishi Montero Bulb Size Chart

Position	Bulb Size	Shop
Side Marker	168	Buy 168 →
Turn Signal Front	7440NA	Buy 7440NA →
Fog Light	9006	Buy 9006 →
Low Beam	H4	Buy H4 →
Parking Light	168	Buy 168 →
License Plate	168	Buy 168 →
Turn Signal Rear	7440NA	Buy 7440NA →
Brake Light	7443CK	Buy 7443CK →
Tail Light	7443CK	Buy 7443CK →
Reverse Light	7440	Buy 7440 →
Dome Light	DE3175	Buy DE3175 →