Genuine OEM Volkswagen 1 Set Piston Rings, part number 03H198151E. This set of piston rings is essential for maintaining engine compression, sealing the combustion chamber, and controlling oil consumption. They are installed on the pistons within the engine cylinders. Genuine OEM piston rings are manufactured to precise tolerances for optimal sealing, heat transfer, and wear resistance, ensuring the longevity and performance of your engine.