What is the low beam headlight bulb size for a 1999 Infiniti Q45?

The 1999 Infiniti Q45 uses a HID-D2R 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 1999 Infiniti Q45?

The high beam bulb size for the 1999 Infiniti Q45 is HID-D2R LED.

Why are my 1999 Infiniti Q45 headlights dim?

Dim headlights on a 1999 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 HID-D2R LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1999 Infiniti Q45 fog light?

The 1999 Infiniti Q45 uses a H3 LED bulb for the fog light position.

Is the 1999 Infiniti Q45 single or dual beam?

The 1999 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 1999 Infiniti Q45?

Yes, the 1999 Infiniti Q45 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D2R LED LED conversion kit for the low beams.

Does the 1999 Infiniti Q45 have fog lights?

Yes, the 1999 Infiniti Q45 takes a H3 LED bulb for the fog light position.

Did the 1999 Infiniti Q45 change headlight bulb sizes from the previous year?

Yes — the 1999 Infiniti Q45 uses different bulb sizes than the 1998 model. The 1999–2000 generation introduced this bulb configuration.

Is the 1999 Infiniti Q45 the first or last year to use HID-D2R LED bulbs?

The 1999 Infiniti Q45 is the first year in the 1999–2000 generation to use the HID-D2R LED bulb for the low beam headlight.

How do I change the headlight on a 1999 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 HID-D2R 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 1999 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 HID-D2R 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 1999 Infiniti Q45 headlights?

A pair of HID HID-D2R LED bulbs costs $50 to $150. 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 1999 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 HID-D2R LED position are available as direct plug-and-play replacements.

The 1999 Infiniti Q45 is the first model year to use this bulb configuration (1999–2000).

Fitment Guaranteed for 1999 Infiniti Q45

What Size Bulbs Does a 1999 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

$50 - $150 (HID System)

What Lighting System Does the 1999 Infiniti Q45 Have?

Lighting on the 1999 Infiniti Q45 is managed by a total of 12 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D2R projector housings for high-intensity output. This model belongs to the mid years of the Q45's 1990-2006 production span.

Can You Put LED Bulbs in a 1999 Infiniti Q45?

The 1999 Infiniti Q45 is already equipped with factory D2R HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H3 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

1999 Infiniti Q45 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D2R LED	Buy HID-D2R LED →
High Beam	HID-D2R LED	Buy HID-D2R 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	921	Buy 921 →
Trunk Light	158	Buy 158 →
Tail Light	7443	Buy 7443 →

How do the 1999 Infiniti Q45's bulbs compare to other years?

The 1999 Infiniti Q45 changed bulb sizes from 1998. The previous model year used a different configuration.

The 2000 model continues with the same bulb sizes.

This bulb configuration covers the 1999–2000 model years. ← 1998 2000 →

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Other Q45 Years

2006 2005 2004 2003 2002 2001 2000 1998 1997 1996 1995 1994 1993 1992 1991 1990

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