Genuine OEM BMW Front Engine Crankshaft Seal, part number 11147647381. This vital seal is designed to prevent fluid leaks, specifically oil, from escaping around the crankshaft at the front of the engine. Maintaining the integrity of this seal is crucial for proper lubrication and overall engine health. Manufactured with high-quality sealing materials and precise dimensions to ensure a reliable, long-lasting seal. Genuine OEM seals offer superior resistance to heat, pressure, and contaminants.