路虎 沃尔沃 S40 C30 C70 前氧传感器 30751797 欧标品质

When your Land Rover or Volvo S40, C30, C70 shows check engine light, weak acceleration, noticeably higher fuel consumption, idle jitter, or exhaust odor, this usually indicates front oxygen sensor aging or failure, unable to accurately monitor air–fuel ratio. This sensor normally detects exhaust oxygen content in real time and feeds back to the ECU to ensure optimal mixture for improved power and lower emissions. OEM number 30751797; compatible with Land Rover and Volvo S40, C30, C70. Install when cold, avoid thread damage, recommend using a dedicated socket and tightening to specified torque to prevent leaks or signal faults.