Mazda8 2.5L Front Oxygen Sensor L5G9-18-8G1 Universal Parts Emission Standard

Mazda 8 2.5L front oxygen sensor, OEM L5G9-18-8G1, uses high-temperature resistant ceramic substrate and dual protective tubes; durability tests show over 80% of OEM life. It monitors exhaust oxygen content and feeds back to ECU to adjust air-fuel ratio, ensuring combustion efficiency and emissions compliance. Installation is moderate difficulty; remove the old sensor and carefully torque the new one to specification to restore exhaust control function.