Buy INFINITI Q50 Headlight Assembly

Background Info

The INFINITI Q50 uses a single-piece headlamp assembly that has relied on LED projector low-beams and LED reflector high-beams since the sedan's 2014 debut. Optional tech such as Adaptive Front-lighting System (AFS) and High-Beam Assist tilt or dim the front lights automatically on curves or when traffic approaches. Independent crash-safety reviews rate the Q50's lamps from "Acceptable" to "Marginal," depending on trim. U.S. rules limit how high the beam may shine, and a simple Phillips-screw adjustment keeps the lamp aimed correctly. The most common owner complaints are moisture inside the housing and occasional leveling-motor noise; both are fixable. Typical bulb or module replacement runs about $150-$340, while a full assembly can exceed $1,200, so good care and correct adjustment matter.

Model Fitment

• Fits every Q50 model year 2014 through 2025, including Luxe, Sensory, Sport, and Red Sport 400 versions.
• All trims ship with LED headlamps; AFS and High-Beam Assist are bundled in Technology/ProACTIVE packages from 2014 onward. (Infiniti News)

Lighting Technology

• LED projectors (low beam) give a bright, precise cutoff that reduces glare and saves power versus halogen. (IIHS)
• LED reflectors (high beam) throw a wider pattern for long-range vision.
• Adaptive Front-lighting swivels the projectors several degrees with steering input to light upcoming bends. (Infiniti News)
• High-Beam Assist lifts or dims the high beams when the forward camera sees traffic or street-lights.
• LEDs need far less energy and last up to 25 times longer than incandescent bulbs, cutting strain on the alternator. (The Department of Energy's Energy.gov)

Key Features

← scroll table horizontally →

Safety Ratings

• IIHS Headlight rating for 2021 Q50 Red Sport with ProACTIVE: "A" (Acceptable). (IIHS)
• Base trims without AFS score "M" (Marginal).
• IIHS research links adaptive beams to lower glare than older HID systems. (IIHS)

Bulb & Module Specs

• Low/High beam: sealed LED modules (not user-serviceable).
• Front fog‐lamp: LED on 2018-25; earlier halogen H8/H11.
• Front turn-signal/DRL strip: 7440NA amber LED chip.
• If buying older used housings (2014-15), check the rear connector count; AFS units add an extra three-pin plug. (Q50 Tech)

Adjusting Aim

1. Park 25 ft (7.6 m) from a flat wall.
2. Mark the lamp centerline (H-line) and a second line 2 in (5 cm) lower. U.S. Federal Standard 108 limits the beam center to no more than 2 in above or below this point. (eCFR)
3. Insert a long Phillips screwdriver in the adjustment gear behind each lamp; turn clockwise to raise, counter-clockwise to lower. (Q50 Tech)
4. Re-check after loading trunk or rear seats; self-levelers correct small changes but large loads still shift aim slightly.

Common Issues

• Condensation or water inside lens - usually a failed perimeter seal; replacement housing is the permanent fix. (Reddit)
• Leveling-motor ticking at start-up - harmless self-check unless noise persists. Owner forums suggest lubricating the actuator. (Infiniti Q50)
• Yellowing lens on high-mileage cars - polish with a plastic headlight kit to restore clarity and limit light scatter.

Maintenance & Care

• Wash the polycarbonate lens with car-shampoo, not household glass cleaner, to avoid UV-coating damage.
• Keep the windshield camera area clean so High-Beam Assist works correctly.
• Cycle headlamps once a month to verify both fans (inside LED heat-sinks) still spin.

Legal Requirements

• U.S. law requires the cutoff to fall within ±2 in vertical and ±10 in horizontal at 25 ft. (eCFR)
• Any auxiliary fog lamp must follow low-beam height rules. (Q50 Tech)
• Adaptive driving beams became legal nationwide in 2022, so aftermarket matrix upgrades are now permissible when DOT-marked. (IIHS)

DIY Upgrade Ideas

• LED accent boards can replace the stock white DRL strip with color-changing effects; ensure the board carries an SAE/DOT mark if you drive on public roads. (Infiniti News)
• Film protection - a clear PPF layer guards against stone pits and UV haze.
• Software update - dealer can flash newer AFS maps that smooth turn-in speed on 2018-up cars.

Cost Guide

← scroll table horizontally →

Frequently Asked Questions

Q: What years of the Q50 use the same headlamp?
A: All U.S. Q50 sedans from 2014 through the current 2025 model share the same basic LED lamp shell. Trims with AFS add one extra wiring plug but still bolt in. (Infiniti News)

Q: Can I change just the bulb?
A: Not on factory LEDs. The diode array is sealed to a heat-sink; if one diode fails, replace the module or the entire lamp. (IIHS)

Q: Why is there moisture inside my light?
A: The lens seal can crack, letting humid air in. Once water stains appear, the only lasting cure is a new housing or professional re-seal. (Reddit)

Q: How bright are the stock lamps?
A: IIHS testing shows Q50 low-beams give about 150 ft of clear light straight ahead and 250 ft when high-beam assist is engaged. (IIHS)

Q: Do I need to re-aim after lowering the car?
A: Yes. Lowering springs tilt the body; re-aim using the adjustment screw so the cutoff stays under the 2-in rule. (YouTube)

Q: Is upgrading to AFS worth it?
A: Adaptive lamps scored one full grade higher in glare tests and improve cornering visibility, especially on dark rural roads. (IIHS)

Q: Will LED upgrades save energy?
A: LEDs draw roughly 75 % less power than halogen bulbs, easing alternator load and slightly boosting fuel efficiency. (The Department of Energy's Energy.gov)

Q: How often should I polish the lenses?
A: Check clarity twice a year; polish when the surface looks cloudy to maintain beam distance.

Q: Are aftermarket RGB DRLs legal?
A: Colored lights are legal only for show use in most states. White or amber is required on public roads. Always verify local rules.

Q: Can the headlamps be coded to flash with the alarm?
A: Yes. Using the on-board settings menu, you can enable headlamp flash on lock/unlock without extra wiring.

All facts are based on reliable industry, government, or manufacturer sources cited throughout.