Nissan Teana Front Oxygen Sensor 22690-8J001 with OZA544-N7 Maintenance Emission System

Nissan Teana (2.0L/2.5L) owners: when idle is unstable, fuel consumption rises, or check engine light is on, the front oxygen sensor OEM 22690-8J001 (compatible with OZA544-N7) may be the culprit. It is installed on the front section of the exhaust pipe near the exhaust manifold and continuously monitors exhaust oxygen content, feeding back to the ECU to precisely adjust the air-fuel ratio for efficient combustion and compliant emissions. Installation difficulty is medium; estimated labor 0.5-1 hour; detach carefully to avoid thread damage.