Toyota Tacoma & Vios Universal Rear Oxygen Sensor 89465-42020, long life sensing stable and reliable

Toyota Tacoma and Vios downstream oxygen sensor 89465-42020, installed behind catalytic converter, monitors exhaust oxygen content and feeds ECU to maintain combustion efficiency and emissions; also compatible with 234-4189 and 89465-09280. Installation difficulty medium; labor 30-45 minutes; protect threads during removal. If idle is unstable, fuel consumption rises significantly, check engine light on, or there is exhaust odor, sensor aging requires replacement.