Genuine OEM Volkswagen Charge Air Cooler, part number 4M0145803CA. This component cools compressed air from the turbocharger before it enters the engine, increasing power and efficiency. It is located at position 1 in the diagram. The part weighs 3.665 kg and has dimensions of 0.46m x 0.31m x 0.2m. Genuine OEM charge air coolers are manufactured to precise specifications for optimal heat exchange and durability.