
Stem N52b25 Crankshaft Diesel Engine OEM11210402531 for BMW X3 X4 X5 X6 E90 E91 Z4 2.5L N52. OEM and ODM Services: Full customization, minor customization, and flexible options available from samples or designs. ISO 9001 Certified: Factory passed ISO-9001 certification ensuring quality management standards. 24 Months Warranty: Comprehensive 24-month warranty coverage for mechanical defects. One-Stop Production: Complete in-house manufacturing from melting, casting, heat treatment to machining and inspection. 100% Final Inspection: Every finished product undergoes visual and functional inspection before shipment. Global Market Reach: Exporting to North America, Europe, Southeast Asia, Middle East, and other regions for over 25 years. Stable Quality Guarantee: Pre-production samples and final inspections ensure consistent product quality. Fast Lead Time: Peak and off-peak season lead times both within 15 working days.