5010379321 headlamp left is a direct-fit style front headlight assembly designed to fit compatible with RENAULT TRUCKS Premium (EU, 1996–). Built for commercial truck duty cycles, it helps restore road illumination, secure mounting, and dependable weather sealing for daily fleet operation.

Common replacement triggers include cracked lens, reflector aging, moisture ingress, broken mounting tabs after vibration or corner impacts, and unstable beam pattern caused by worn adjusters. Replacing the complete assembly can reduce workshop time and improve first-time fix rate.

Opposite-side OE (shown once): 5010379320

5010379321 headlamp left is a high-impact safety item for fleets and distributors. For fewer returns and faster picking, label bins by range (Premium), side (LH), and connector type. Keep one verified sample per variant to prevent mix-ups.

Workshop steps: Disconnect power, access the front lamp area, remove fasteners, unplug the connector, install the replacement, then confirm beam aim and function. This 5010379321 headlamp left is intended as a direct-fit style replacement for the stated coverage.