Rear Left Headlight Level 5Q0512521J, 5Q0512521F For A3 2012-20, TT 2014-, 17-20, 12-21, B8 This rear left headlight level is designed for specific vehicle models equipped with automatic headlight leveling systems.Constructed with a GRP (Glass fibre Reinforced Plastic) housing, it offers and resistance to environmental factors.The unit features an advanced photoelectric type that accurate height detection for proper headlight alignment.The component includes a 4-pin connector with an ergonomic D-Shape design, allowing for straightforward installation and a secure electrical connection.Its measuring range adheres to OEM standards, supporting performance within the vehicle's specifications.Designed for integration on the rear axle left side, this fits directly into place with no modifications required.The package includes the unit, holder, coupling rod, and holding frame, enabling complete assembly with existing vehicle components.It is compatible with specified models from model years 2012 to 2021, providing consistent across multiple vehicle variants.This is a non-OEM replacement part.Any trademarks or model numbers cited are used strictly to demonstrate compatibility.