现代起亚速迈1.6L 氧传感器 39210-2B040 234-4239 原厂替换件 稳定输出

Hyundai/Kia Suma 1.6L oxygen sensor, OEM 39210-2B040, compatible with 234-4239, 39210-3F000, 39210-3F020; installed on the exhaust manifold or exhaust pipe, monitors exhaust oxygen content and transmits signal to ECU to adjust the air-fuel ratio, ensuring efficient combustion. Installation difficulty: medium; recommended labor time about 0.5-1 hour. When the engine check light is on, fuel consumption rises significantly, idle is unstable, or acceleration is weak, usually due to sensor aging or failure; replace promptly.