This CORTECO crankshaft seal, part number 12011351B, is specifically engineered for the fuel high-pressure pump. It plays a crucial role in preventing oil or fuel leaks from the pump assembly, which is essential for the longevity and efficiency of your engine. Crafted with durable materials, this seal is built to withstand the demanding conditions within the engine bay, offering consistent performance and a secure fit. Proper installation of this seal will help maintain the integrity of your fuel system and contribute to smooth engine operation.