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Stem Crankshaft B48b20 for BMW OEM 11218639541. 24 Months Warranty: Comprehensive 24-month warranty coverage for peace of mind. ISO 9001 & CE Certified: Meets international quality and safety standards. Full Customization Options: Supports customization from samples, designs, and flexible adjustments. 100% Finished Inspection: Rigorous visual and functional inspection for every unit. Complete In-House Production: All processes from melting to packing handled internally for quality control. 25 Years Export Experience: Established in 1997 with extensive global trading history. Low MOQ Requirement: Minimum order quantity starts at just 10 pieces. Fast Lead Time: Average lead time within 15 workdays for both peak and off seasons.