Maserati Quattroporte 2012 Oxygen Sensor 670009076/0258027101

Maserati Quattroporte 2012 oxygen sensor (numbers 670009076/0258027101) installed in exhaust manifold or pipe, monitors exhaust oxygen content in real time and feeds ECU to control air-fuel ratio for efficient combustion. Fits 2012-2016 Quattroporte (M156 platform) 3.0T or 3.8T engines; installation difficulty: medium; estimated labor 1–1.5 hours; protect threads during removal. If check engine light on, idle hesitation, abnormal fuel consumption, or reduced acceleration occurs, usually sensor aging; replace promptly.