Dorman 1591866 Headlight Assembly - Left

OE-Style Left Headlight for Nissan 350Z

This Dorman headlight assembly is a direct replacement for the left side on select 2003-2005 Nissan 350Z models with halogen lighting. It is reverse-engineered to match the original headlight’s look, fit, and function while helping restore proper road illumination and a clean factory appearance.

Key Features

• Fits 2003-2005 Nissan 350Z, left, halogen
• Clear lens with plastic lens and housing construction
• Halogen bulb technology with bulbs included
• Street legal design for road use
• 12.8-volt electrical specification
• OE-style replacement from Dorman, part number 1591866

Detailed Description

Dorman 1591866 is a replacement headlight assembly built for the left side of the 2003-2005 Nissan 350Z with halogen equipment. It uses a clear lens, plastic housing, and plastic lens material to mirror the original headlamp layout and maintain the vehicle’s factory lighting profile. The assembly includes halogen bulbs and is specified as street legal, making it a practical choice when replacing a damaged, cloudy, or non-functioning headlight on a Nissan 350Z.

This part cross-references Eagle Eye DS566-B001L and 4221-0026L for the same application.

What It Helps Fix

• Cracked or broken left headlight housing
• Clouded or yellowed lens affecting light output
• Dim, failed, or inconsistent halogen headlight performance
• Water intrusion caused by a damaged lamp assembly
• Loss of factory appearance on the front end of a Nissan 350Z

Installation Notes and Tips

Verify halogen-equipped fitment before ordering: this assembly is for 2003-2005 Nissan 350Z left-side applications only. Compare the original connector, mounting points, and lamp shape to the replacement before installation. After installation, confirm proper beam aim and headlight operation to ensure safe nighttime visibility.

Quality Assurance

Dorman reverse-engineers this replacement headlight to match the stock unit on specific vehicles, helping deliver OE-style fit and function without a dealership replacement.