Toyota Highlander 3.5 and Lexus ES350/RX350 Front Oxygen Sensor 89467-0E190, KLP original replacement part precise air-fuel ratio control

Toyota Highlander front oxygen sensor (OEM 89467-0E190) from KLP as OEM replacement; monitors exhaust oxygen and feeds ECU to control air-fuel ratio. Installation difficulty medium; torque and thread cleaning important; estimated labor about 0.5–1 hour. If idle is unstable, fuel consumption high, or acceleration weak, sensor aging is likely; replace promptly.