1994-1996 Infiniti Q45 Headlight: The '94 Split, Glass Lenses, and Replacement Guide

Key Information for 1994-1996 Q45 Headlights

The headlight assemblies for the 1994-1996 Infiniti Q45 are notable for two key reasons: a mid-year production change in 1994 and their use of glass lenses. Understanding these details is essential for anyone looking to buy, replace, or troubleshoot these parts.

The Critical 11/1993 Production Date Split

Infiniti performed a facelift on the Q45 that took effect mid-way through the 1994 model year. Headlights from a car built in October 1993 will not fit a car built in December 1993. Before purchasing a replacement, always check the production date sticker located on the driver's side door jamb to confirm your vehicle's build month and year.

Headlight Technology: Halogen, Not HID

The 1994-1996 Q45 came from the factory with halogen headlights. They were not offered with HID/Xenon lights from the factory in these years. The assembly uses a dual-filament 9003 (or H4) bulb for the low and high beams in a single bulb. Some models may use a separate 9005 bulb for the high beam. Because these are standard halogen reflector housings, they do not require any separate ballasts, igniters, or computer modules. Upgrading to aftermarket LED or HID bulbs is possible, but may require modifications and can produce a poor beam pattern if not designed correctly.

Symptoms of a Failing Headlight Assembly

Failure isn't always about a burnt-out bulb. The entire assembly can fail in several ways:

• Moisture or Condensation: Water inside the lens is a clear sign that the seal between the glass lens and the rear housing has failed. This moisture can cause corrosion on the bulb connectors and damage the reflective surfaces inside.
• Dim or Flickering Light: While often a bulb or wiring issue, corrosion on the internal connectors of the assembly can also cause intermittent power loss.
• Cracked or Chipped Lens: The glass lenses are durable against hazing but can be cracked or chipped by road debris. A cracked lens is a safety hazard, can fail inspection, and will allow moisture to enter.
• Damaged Mounting Tabs: The plastic mounting tabs that secure the assembly to the car are brittle after decades of heat and vibration. If these are broken, the headlight will be loose, causing the light beam to vibrate and making proper aiming impossible.
• Poor Light Output: Over time, the chrome reflective coating inside the housing can degrade, especially if exposed to moisture. This reduces the amount of light projected onto the road, even with a new bulb.

Buying a Used 1994-1996 Q45 Headlight: What to Inspect

Given the age of these vehicles, a quality used OEM headlight is often the best and only option, as new OEM stock is scarce and aftermarket quality can be poor. Here’s what to look for:

Step 1: Confirm the Production Date Range

First and foremost, ensure the part is from a 1994 (built 11/93 or later), 1995, or 1996 Q45. A headlight from an earlier 1993 or early 1994 model will not fit.

Step 2: Inspect the Glass Lens Carefully

Look for major rock chips, stars, or cracks. Small pits are normal for a used part, but any crack that goes through the glass means the assembly is compromised. Run your finger over the surface to feel for imperfections.

Step 3: Check All Mounting Tabs

This is the most common failure point. Carefully inspect every plastic tab on the top, bottom, and sides of the housing. They should be fully intact with no stress cracks or signs of glue or plastic-weld repairs. A broken tab means the headlight cannot be securely mounted.

Step 4: Examine the Rear Housing and Seals

Look for cracks in the black plastic housing, especially around the mounting points. Check the rubber seal that goes around the bulb opening; it should be pliable, not dry-rotted and brittle. Look for any signs of silicone or other sealants, which indicate a previous leak repair that may not hold.

Step 5: Check Wiring and Connectors

Ensure the main electrical connector is not cracked, melted, or corroded. If the pigtail harness is included, check that the wires are not brittle or frayed.

Known Issues, Recalls, and TSBs

There are no specific recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) related to the headlight assemblies on 1994-1996 Infiniti Q45 models. Any issues are typically related to age, such as seal failure or stripped adjustment screws. Some owners have noted that the factory aim can be low and have used shims behind the mounting bolts to adjust the angle.

Replacement and Alignment

Installation Overview

Replacing the headlight assembly is a moderately difficult job. On some models, the front bumper cover may need to be loosened or partially removed to access the lower mounting bolts. The passenger side assembly can be more difficult to remove due to bolt placement.

1. Disconnect the negative battery terminal.
2. If necessary, loosen the front bumper cover and grille for access.
3. Locate and remove the bolts securing the headlight assembly to the core support.
4. Carefully pull the assembly forward and disconnect the main electrical connector.
5. Installation is the reverse of removal. Be careful not to overtighten the mounting bolts, which can crack the plastic tabs.

Headlight Aiming (Required After Replacement)

After installing a new or used headlight, you must aim it properly. Failure to do so can blind oncoming drivers and reduce your own visibility.

The basic procedure is as follows:

1. Park the car on a level surface, 25 feet away from a flat wall.
2. Ensure tire pressures are set correctly.
3. Measure the height from the ground to the center of your headlight lens.
4. On the wall, make a horizontal mark that is 2 inches lower than your measured headlight height.
5. Turn on the low beams. The top of the bright cutoff line for each headlight should be aligned with the mark on the wall.
6. Use the adjustment screws on the back of the headlight assembly to move the beam up/down and left/right until it is properly aimed. 🎬 Watch: A quick guide to aiming and aligning headlights Some Q45 models also have an interior dial to adjust the headlight angle based on vehicle load; ensure this is set to '0' before aiming.
🎬 See how to adjust the headlight angle from inside the cabin

Cost Comparison

Prices for a single headlight assembly can vary significantly based on condition and source.

Frequently Asked Questions (FAQ)