Dongfeng Nissan Qashqai 1.2T Oxygen Sensor 22690-00Q1D, precise air-fuel ratio control

Dongfeng Nissan Qashqai 1.2T oxygen sensor 22690-00Q1D directly replaces factory part number with broad compatibility; no additional modification needed. Core function is to monitor exhaust oxygen content in real time and feedback to ECU to precisely control air–fuel ratio, ensuring engine combustion efficiency. After installation, it resolves high fuel consumption, weak acceleration, or engine fault light; restores power and fuel economy. If idle is unstable, exhaust emits black smoke, or annual inspection emissions exceed standards, the oxygen sensor aging is indicated; replacement recommended.