The O-ring K 74152 is a high-performance sealing component specifically designed for the pump impeller K 74123 used in the ZV40/48 fuel transfer system. Exposed to rotational forces, fuel contact, and thermal variations, this O-ring provides essential sealing between the impeller and adjacent housing surfaces. Its durable, fuel-resistant material reduces wear, maintains pressure stability, and prevents internal leakage, ensuring smooth hydraulic performance. The reliability of the K 74152 O-ring directly influences pump output efficiency and helps guarantee uninterrupted and balanced fuel flow throughout engine operation.