Genuine OEM Audi Exterior Mirror Housing, part number 1S1857508AL9B9. This component encloses and protects the delicate internal mechanisms and mirror glass of the exterior side mirror assembly. It is a critical outer shell, often exposed to environmental elements and minor impacts. Weighing 1.899 kg and measuring 0.35m x 0.31m x 0.13m, this housing is finished in Satin Black (9B9). Choosing a genuine OEM housing ensures precise fitment, correct colour matching, and durable protection for the mirror's internal components.