When sourcing Elantra headlights, you must first identify the specific model year and trim level, as designs vary significantly between generations (e.g., AD, CN7). Prioritize LED assemblies over halogen for higher profit margins and better performance. Ensure the product features UV-resistant polycarbonate lenses to prevent yellowing and die-cast aluminum heat sinks for efficient thermal management. For high-end markets, look for plug-and-play wiring harnesses that require no wire cutting, ensuring a seamless installation for the end-user.