0445110478 — Symptoms & Failure Modes
Common symptoms and verified failure modes of a failing Bosch 0445110478 BMW N47 / N57 2.0d & 3.0d Common Rail Injector.
Rough idle / hunting revs · high
A leaking or out-of-balance injector under/over-fuels its cylinder, causing an unstable idle.
Hard starting · high
Injector back-leakage and worn glow components lower cranking rail pressure on N47/N57.
Loss of power / limp mode · high
Rail-pressure or injector-correction faults trigger an ECU derate.
Fluctuating or low rail pressure codes · medium
Excessive injector leak-off prevents the rail holding target pressure.
Black smoke and higher fuel consumption · medium
Poor atomisation from a worn or coked nozzle.
Cylinder-specific misfire · medium
A single failing injector produces a stumble on its cylinder.