Genuine OEM Audi Turbocharger Oil Return Line, part number 03L145735A. This critical component is responsible for safely routing hot, spent oil from the turbocharger assembly back to the engine's oil pan, preventing oil starvation or buildup. It is positioned directly beneath the turbocharger, connecting to its housing and extending downwards. Constructed from durable metal, this line measures approximately 0.22m in length and weighs 0.433 kg. Choosing a genuine OEM oil return line ensures the correct routing geometry, material integrity, and heat resistance required for the turbocharger's demanding operating conditions, preventing leaks and maintaining optimal engine lubrication.