This 1.25 inch transfer case chain is designed for the X3 E83 (2003–2011, including LCI models from 2007–2010) equipped with specific 2.5L and 3.0L engine variants.The chain features a width of 1.25 inches, 80 links (40 plates per side), and a pitch of 0.375 inches between articulation center points.It is compatible with the ATC400 transfer case.Compatible engine configurations include: - 2.0L diesel: 136HP (100kW), 143HP (105kW), 150HP (110kW), 163HP (120kW), 177HP (130kW) - 2.0L petrol: 150HP (110kW) - 2.5L petrol: 192HP (141kW), 211HP (155kW), 218HP (160kW) - 3.0L diesel: 204HP (150kW), 211HP (155kW), 218HP (160kW), 286HP (210kW) - 3.0L petrol: 231HP (170kW), 264HP (194kW), 272HP (200kW) Replaces the following OEM part numbers: SP00178, HV-086, HV086, N902, 29 02, 27103455132, 27103455134, 27103455135, 27103455136, 27103455137, 27103455138, 27103455139, 27107539266, 27107539265, 27107539262.The product is supplied in the condition shown in the images.