Genuine OEM Audi Oil Cooler, part number 4E0317021E. This oil cooler is designed to regulate the temperature of the engine oil, preventing overheating and ensuring optimal lubrication. It is typically located in the engine's oil circulation system. Constructed from durable materials to withstand high temperatures and pressures. Genuine OEM oil coolers are manufactured to precise specifications, ensuring proper fitment and thermal efficiency, which is crucial for engine longevity.