What is the low beam headlight bulb size for a 1990 Mitsubishi Sigma?

The 1990 Mitsubishi Sigma uses a 9006 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 1990 Mitsubishi Sigma?

The high beam bulb size for the 1990 Mitsubishi Sigma is 9005 LED.

Why are my 1990 Mitsubishi Sigma headlights dim?

Dim headlights on a 1990 Mitsubishi Sigma can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9006 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1990 Mitsubishi Sigma fog light?

The 1990 Mitsubishi Sigma uses a LED Fog Light bulb for the fog light position.

Is the 1990 Mitsubishi Sigma single or dual beam?

The 1990 Mitsubishi Sigma uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1990 Mitsubishi Sigma?

Yes, the 1990 Mitsubishi Sigma comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9006 LED LED conversion kit for the low beams.

Does the 1990 Mitsubishi Sigma have fog lights?

Yes, the 1990 Mitsubishi Sigma takes a LED Fog Light bulb for the fog light position.

Did the 1990 Mitsubishi Sigma change headlight bulb sizes from the previous year?

No — the 1990 Mitsubishi Sigma uses the same bulb sizes as the 1989 model. This configuration has been consistent across the 1989–1990 generation.

Is the 1990 Mitsubishi Sigma the first or last year to use 9006 LED bulbs?

The 1990 Mitsubishi Sigma is the last year in the 1989–1990 generation to use the 9006 LED bulb for the low beam headlight.

How do I change the headlight on a 1990 Mitsubishi Sigma?

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 9006 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 1990 Mitsubishi Sigma?

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 9006 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 1990 Mitsubishi Sigma headlights?

A pair of halogen 9006 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 1990 Mitsubishi Sigma?

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 9006 LED position are available as direct plug-and-play replacements.

The 1990 Mitsubishi Sigma is the last model year to use this bulb configuration (1989–1990).

Fitment Guaranteed for 1990 Mitsubishi Sigma

What Size Bulbs Does a 1990 Mitsubishi Sigma 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 1990 Mitsubishi Sigma Have?

Owners of the 1990 Mitsubishi Sigma will find a total of 12 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9006 LED low beam and 9005 LED high beam bulbs for precise light distribution. This model belongs to the late years of the Sigma's 1989-1990 production span.

Can You Put LED Bulbs in a 1990 Mitsubishi Sigma?

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 9006 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.

1990 Mitsubishi Sigma Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9006 LED	Buy 9006 LED →
High Beam	9005 LED	Buy 9005 LED →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	168 or 921 LED	Buy 168 or 921 LED →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	1156 LED	Buy 1156 LED →
Turn Signal Rear	1156 LED	Buy 1156 LED →
License Plate	67	Buy 67 →
Parking Light	168	Buy 168 →
Reverse Light	1156	Buy 1156 →
Trunk Light	LED Light	Buy LED Light →
Tail Light	1157	Buy 1157 →

How do the 1990 Mitsubishi Sigma's bulbs compare to other years?

The 1990 Mitsubishi Sigma uses the same bulbs as the 1989 model.

This bulb configuration covers the 1989–1990 model years. ← 1989

Finding the best installation guide...

Other Sigma Years

1989

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