1.???? Selected BMW N51 / N52 Fitment: Compatible with selected BMW 128i, 325i, 325xi, 328i, 328xi, 328i xDrive, 330i and 330xi models equipped with a matching N51 or N52 naturally aspirated 6-cylinder engine and E8x / E9x cooling-system layout. Please verify chassis and transmission configuration before ordering. 2.???? Replacement Part Numbers: Replacement references include 11537516414, 11537521049, 17127531579, 17127531581, 11537545890 and 17127618510. Please compare every original hose number, quick-connect end, branch location and routing separately before purchase. 3.???? Complete 7-Piece Coolant Hose Kit: Package includes 7 pre-formed cooling-system hose components for compatible radiator, engine, water pump, thermostat, expansion-tank and transmission-cooling circuits. Visible spring clamps are included where shown in the product pictures. 4.???? Important Engine & Chassis Check: Designed for matching N51 / N52 naturally aspirated applications. Not for N54, N55, N20 or N26 engines. For 2012-2013 328i models, verify that the vehicle uses the compatible E92 / E93 N51 or N52 configuration rather than an F30 2.0L turbo engine. 5.???? Transmission & Installation Note: Some hoses in this kit are associated with the automatic-transmission oil-cooler circuit. Manual-transmission vehicles may use a different hose configuration. Compare all 7 original hoses before ordering. Cooling-system refill, BMW bleeding procedure and complete leak inspection are required after installation.