Toyota NZE121 Rear Oxygen Sensor 89465-12630, precisely monitors exhaust emissions

Toyota NZE121 series Corolla, Yaris, etc. rear oxygen sensor (OEM: 89465-12630) direct replacement for aging rear sensor; no wiring changes needed. Core function is monitoring oxygen content in exhaust and feeding ECU to correct air-fuel ratio; improves economy and emissions. After installation, resolves high fuel consumption, rough idle, acceleration hesitation, and check engine light; restores factory-level power and economy.