Mercedes-Benz ML/GL Oxygen Sensor 0005408517 0258003798 Exact Replacement

Oxygen sensor direct replacement for Mercedes-Benz original part numbers 0005408517 and 0258003798; high universality, not batch-dependent. Its function is to monitor oxygen content in the exhaust and feed the signal to the ECU to precisely control injection, ensuring combustion efficiency. Fits Mercedes-Benz ML (W164) and GL (X164) models; installation will address high fuel consumption and weak acceleration. If you notice rough idle, exhaust smell, or the check engine light on the dash, the oxygen sensor is aging and should be replaced.