What is the low beam headlight bulb size for a 1998 Infiniti Q45?

The 1998 Infiniti Q45 uses a 9003 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 1998 Infiniti Q45?

The high beam bulb size for the 1998 Infiniti Q45 is 9003 LED.

Why are my 1998 Infiniti Q45 headlights dim?

Dim headlights on a 1998 Infiniti Q45 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9003 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1998 Infiniti Q45 fog light?

The 1998 Infiniti Q45 uses a H3 LED bulb for the fog light position.

Is the 1998 Infiniti Q45 single or dual beam?

The 1998 Infiniti Q45 uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 1998 Infiniti Q45?

Yes, the 1998 Infiniti Q45 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9003 LED LED conversion kit for the low beams.

Does the 1998 Infiniti Q45 have fog lights?

Yes, the 1998 Infiniti Q45 takes a H3 LED bulb for the fog light position.

Did the 1998 Infiniti Q45 change headlight bulb sizes from the previous year?

Yes — the 1998 Infiniti Q45 uses different bulb sizes than the 1997 model. The 1998 generation introduced this bulb configuration.

Is the 1998 Infiniti Q45 the first or last year to use 9003 LED bulbs?

The 1998 Infiniti Q45 is the only year in the 1998 generation to use the 9003 LED bulb for the low beam headlight.

How do I change the headlight on a 1998 Infiniti Q45?

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 9003 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 1998 Infiniti Q45?

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 9003 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 1998 Infiniti Q45 headlights?

A pair of halogen 9003 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 1998 Infiniti Q45?

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 9003 LED position are available as direct plug-and-play replacements.

The 1998 Infiniti Q45 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1998 Infiniti Q45

What Size Bulbs Does a 1998 Infiniti Q45 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 1998 Infiniti Q45 Have?

Owners of the 1998 Infiniti Q45 will find a total of 12 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a halogen-based setup where a single 9003 LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the mid years of the Q45's 1990-2006 production span.

Can You Put LED Bulbs in a 1998 Infiniti Q45?

Upgrading to LED is one of the most effective ways to modernize your Infiniti's appearance and safety profile. Since your Q45 uses a single 9003 LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H3 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1998 Infiniti Q45 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9003 LED	Buy 9003 LED →
High Beam	9003 LED	Buy 9003 LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	921 LED	Buy 921 LED →
Side Marker	1157NA LED	Buy 1157NA LED →
Turn Signal Front	1157NA LED	Buy 1157NA LED →
Turn Signal Rear	7440 LED	Buy 7440 LED →
License Plate	168	Buy 168 →
Parking Light	1157NA	Buy 1157NA →
Reverse Light	7440	Buy 7440 →
Trunk Light	158	Buy 158 →
Tail Light	7443	Buy 7443 →

How do the 1998 Infiniti Q45's bulbs compare to other years?

The 1998 Infiniti Q45 changed bulb sizes from 1997. The previous model year used a different configuration.

The 1999 model switched to a different bulb configuration.

This bulb configuration covers the 1998 model years. ← 1997 1999 →

Finding the best installation guide...

Other Q45 Years

2006 2005 2004 2003 2002 2001 2000 1999 1997 1996 1995 1994 1993 1992 1991 1990

More from Infiniti

EX35 EX37 FX35 FX37 FX45 FX50 G20 G25

Other Vehicles That Use 9003 LED Bulbs

2023 Kia Rio 2021 Toyota Tundra 2020 Honda Fit 2019 MINI Cooper 2019 Nissan Micra 2019 Nissan Versa