Genuine OEM Volkswagen Charge Air Cooler, part number 04L145749M. This cooler is an essential part of the intake system, designed to reduce the temperature of the compressed air before it enters the engine. By cooling the charge air, it increases air density, leading to improved combustion efficiency and power output. Constructed with an aluminum core and durable plastic end tanks, this unit weighs approximately 2.17 kg. Using a genuine OEM charge air cooler ensures optimal thermal efficiency, precise fitment within the engine bay, and reliable performance under high boost pressures.