Infiniti G37 LED Headlights: AlphaRex Install Guide

Swapping the factory lenses for AlphaRex NOVA LED headlights on your Infiniti G37 is the single biggest visual upgrade you can make to the 2008–2013 coupe and sedan — and it takes an afternoon in your own garage. The G37's 3.7L VQ37VHR V6 makes 330 hp, but its 15-plus-year-old halogen and early-HID headlights leave the front end looking dated and dim. This step-by-step guide walks through exactly how to install a set of plug-and-play LED projector headlights, what tools you need, how to handle the DRL and sequential-signal wiring, and how to aim the beams so you pass inspection and don't blind oncoming traffic. At NLP Performance in Tampa, FL, this is one of the most-requested lighting jobs we ship for the G37.

Why upgrade the Infiniti G37's factory headlights?

The stock G37 headlights are the weak link in an otherwise sharp design. Base and Journey trims shipped with reflector halogen bulbs that top out around 1,000 lumens per side, while Sport and premium trims got bi-xenon HID projectors that yellow and fog with age. Neither has a modern LED daytime running light or sequential signal. A full LED projector headlight like the AlphaRex NOVA fixes all of it at once: a crisp, high-output projector beam, a switchback DRL light bar that runs white and flips amber when you signal, and an animated startup sequence when you unlock the car. Because these are complete sealed housings — not a bulb swap — you also eliminate the cracked lenses and failing HID ballasts that plague high-mileage G37s.

How much brighter are LED projector headlights?

A modern LED projector headlight is a meaningful jump over the G37's factory lighting in both output and color. Halogen reflector bulbs on the base G37 emit a warm, yellowish beam around 3,200 Kelvin and spread light without a hard cutoff, which is why oncoming glare and dark spots are common. LED projectors like the AlphaRex NOVA run a crisp white beam in the 5,500–6,000K range with a defined cutoff line, so more usable light lands on the road and less scatters into the sky or into other drivers' eyes. Owners consistently report a wider, farther-reaching pool of light at night and a color that matches modern OEM LED cars. Because the diodes draw less current than halogen or HID bulbs, they also reduce load on the G37's aging lighting circuit. Just as important for a 2008–2013 car, the NOVA is a fully sealed die-cast housing, so you are not fighting the moisture intrusion, cloudy lenses, and intermittent HID ballasts that come with 15-plus years of age. At NLP Performance, LED projector conversions are the most common lighting upgrade we ship for the platform.

The headlights we recommend for the G37

There are only two paths to modern lighting on the G37: replace the entire headlight with an LED projector unit, or retrofit halo rings into your existing housings. Below are the three finishes of the AlphaRex NOVA full-replacement headlight plus the budget Oracle halo option. All prices below live-update from our store; the AlphaRex NOVA runs roughly $1,200–$1,250 a pair and the Oracle halo kit is around $260.

G37 headlight options compared

Here is how the three AlphaRex NOVA finishes and the Oracle halo kit stack up. All four are plug-and-play in the sense that none require permanent modification, but only the AlphaRex units replace the entire headlight; the Oracle kit installs halo rings inside your factory housing.

Tools and what's in the box

The AlphaRex NOVA kit ships as a matched left/right pair with OEM-style connectors, mounting tabs, and instructions. You do not need to open or bake the housings. Before you start, gather the following:

• 10mm and 12mm sockets with a ratchet and a short extension
• Phillips screwdriver and a plastic trim/panel pry tool for the bumper clips
• A flat-blade screwdriver for the headlight aim adjusters
• A 10mm wrench to disconnect the battery negative terminal
• A soft blanket or fender cover to protect the paint while the bumper is off
• Optional: an LED anti-flicker decoder/resistor harness if your car throws a bulb-out warning or hyperflash

How to install AlphaRex NOVA headlights on your G37

Plan on 1.5 to 2.5 hours for a first-time install. The only slightly involved part is removing the front bumper, which is required to reach the outer headlight bolts on the G37. Work on a cool engine and take photos of each connector before you unplug it.

Step 1: Disconnect the battery

Open the trunk (sedan) or lift the hood and disconnect the negative battery terminal with a 10mm wrench. This protects the lighting control module while you unplug and reconnect the headlight harnesses.

Step 2: Remove the front bumper cover

Remove the push-pin clips along the top of the bumper under the hood, the screws inside each front wheel well, and the fasteners under the front lip. Gently pull the bumper corners away from the fenders and unclip it, then set it on a blanket. On most G37s you can leave the fog-light and washer connectors attached if you rest the bumper carefully; otherwise unplug them.

Step 3: Unbolt and remove the factory headlights

Each headlight is held by three 10mm bolts. Remove them, then pull the headlight forward and unplug the low-beam, high-beam/DRL, and turn-signal connectors. If your car has factory HID, also unclip the ballast and igniter. Set the old units aside — keep them; clean OEM G37 headlights hold resale value.

Step 4: Plug in and mount the AlphaRex NOVA headlights

Connect the NOVA's low-beam, high-beam, DRL, and turn-signal plugs to the factory harness. The connectors are keyed to match, so they only fit one way. Route the small DRL/switchback lead as shown in the instructions, seat the headlight onto its three mounting points, and hand-thread the 10mm bolts before torquing them snug.

Step 5: Reconnect the battery and test everything

Before you put the bumper back on, reconnect the battery and cycle through low beam, high beam, DRL, and left/right turn signals. Confirm the sequential signal sweeps correctly and the DRL switches from white to amber. If a turn signal hyper-flashes or you get a bulb-out warning, install the included or an add-on LED decoder/resistor on that circuit.

Step 6: Reinstall the bumper and aim the beams

Reinstall the bumper in reverse order. Then park 25 feet from a garage door or wall on level ground and use the flat-blade adjuster screws on top of each headlight to set the cutoff line even and slightly below the center of the lens height. Proper aim keeps you legal and prevents dazzling oncoming drivers — do not skip it.

Which finish should you choose?

All three AlphaRex NOVA finishes share the same optics, DRL, and sequential-signal hardware — the difference is purely the internal housing color. Alpha Black is the darkest, blacked-out look and hides best behind the G37's clear lens; it's our top pick for most builds and pairs perfectly with black or dark-gray paint. Plank Gloss Black splits the difference with a cleaner gloss reflector, while Chrome keeps the OEM-style bright bezel for owners who want a factory-plus look on lighter colors. If you're on a budget and only want a modern DRL ring, the Oracle white halo kit retrofits into your existing 2008–2010 coupe housings for around $260, though it keeps your factory beam and requires opening the headlight to install.