Cummins Engine Oxygen Sensor 4326864 5WK96750C A2C89788900-02, durable and reliable

When a Cummins engine experiences rough idle, obvious fuel consumption increase, or emissions fault light stays on, it usually indicates aging and failure of the oxygen sensors, which can no longer accurately monitor oxygen in the exhaust. When functioning normally, this sensor feeds the ECU with the air-fuel ratio signal in real time to ensure optimal combustion, reducing emissions and improving power. Compatible models include commercial vehicles powered by Cummins ISB/ISL/ISM series engines, such as Dongfeng Dayun, Liuqi Chengtong, Foton Auman, etc. OEM numbers: 4326864, 5WK96750C, A2C89788900-02. When installing, be sure to use a dedicated socket to avoid damaging the ceramic element, and ensure the connector seal is intact to prevent water ingress and signal distortion.