What is the low beam headlight bulb size for a 2003 Infiniti QX4?

The 2003 Infiniti QX4 uses a N/A 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 Infiniti QX4?

The high beam bulb size for the 2003 Infiniti QX4 is 9005.

Why are my 2003 Infiniti QX4 headlights dim?

Dim headlights on a 2003 Infiniti QX4 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2003 Infiniti QX4 fog light?

The 2003 Infiniti QX4 typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2003 Infiniti QX4 single or dual beam?

The 2003 Infiniti QX4 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 Infiniti QX4?

Yes, the 2003 Infiniti QX4 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Did the 2003 Infiniti QX4 change headlight bulb sizes from the previous year?

Yes — the 2003 Infiniti QX4 uses different bulb sizes than the 2002 model. The 2003 generation introduced this bulb configuration.

Is the 2003 Infiniti QX4 the first or last year to use N/A bulbs?

The 2003 Infiniti QX4 is the only year in the 2003 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2003 Infiniti QX4?

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 N/A 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 Infiniti QX4?

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 N/A 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 Infiniti QX4 headlights?

A pair of halogen N/A 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 Infiniti QX4?

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 N/A position are available as direct plug-and-play replacements.

The 2003 Infiniti QX4 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2003 Infiniti QX4

What Size Bulbs Does a 2003 Infiniti QX4 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 Infiniti QX4 Have?

The 2003 Infiniti QX4 utilizes a refined lighting configuration featuring 9 distinct bulb positions. It features a comprehensive lighting system powered by a dual-bulb halogen configuration using separate low beam and 9005 high beam bulbs for precise light distribution. This model belongs to the late years of the QX4's 1997-2003 production span.

Can You Put LED Bulbs in a 2003 Infiniti QX4?

Upgrading to LED is one of the most effective ways to modernize your Infiniti's appearance and safety profile. We recommend starting your upgrade with the low beams, as they see the most use. Adding a matching 9005 LED kit later will complete the look and ensure consistent lighting performance.

2003 Infiniti QX4 Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	7440	Buy 7440 →
High Beam	9005	Buy 9005 →
Side Marker	168	Buy 168 →
Brake Light	7443	Buy 7443 →
Tail Light	7443	Buy 7443 →
License Plate	194	Buy 194 →
Turn Signal Rear	1156A	Buy 1156A →
Parking Light	168	Buy 168 →
Reverse Light	921	Buy 921 →

How do the 2003 Infiniti QX4's bulbs compare to other years?

The 2003 Infiniti QX4 changed bulb sizes from 2002. The previous model year used a different configuration.

This bulb configuration covers the 2003 model years. ← 2002

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Other QX4 Years

2002 2001 2000 1999 1998 1997

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