This coolant pipe is a high-quality replacement part designed for various BMW models including the 5 Series (E60, E61), 7 Series (E65, E66, E67), X5 (E70), and X6 (E71, E72). It is compatible with engines such as the 530d (2993cc) manufactured from 2002 to 2005. The part number for this item is 11531705210. Cross-reference numbers include CPP-BM-031, 11537780001, 11537802627, and 11537806706. This coolant hose is a crucial component for your vehicle's cooling system.