Turbo HX55 Turbocharger for Cummins M11 ISM Engine – Service Part
HX55 Turbocharger 3590044, Replacement for Cummins M11 ISM ISME Engines — new aftermarket service part with exhaust temperature resistance rated for heavy-duty diesel operation. Positioned for lifecycle maintenance planning — typical replacement triggers include rising EGT, loss of boost and audible bearing whine before catastrophic failure. Replace as a complete unit or evaluate cartridge and housing condition based on engine service hours and prior rebuild history. Adjacent oil feed lines, intake filters and manifold gaskets share overlapping intervals; coordinated replacement avoids reopening the system. Fits 1999–2012 truck and bus applications with Cummins M11, ISM and ISME platforms. Cross-reference interchange: 3536995, 3536996, 4033813, 3803938NX. Older M11 fleet supply remains actively supported with 12-month warranty and reorder planning guidance included.