NGK Subaru Forester 2004-1999 Direct Fit Oxygen Sensor

This is a direct fit oxygen sensor from NGK for your 1999-2004 Subaru Forester or Impreza. Oxygen sensors are a key part of your car's onboard diagnostic system, helping to keep the engine running at its best. They send constant feedback to the engine control unit (ECU) to manage the air-fuel mixture, which is important for good fuel economy and keeping emissions in check. If the sensor isn't working right, it can also alert the system to issues with fuel delivery or the catalytic converter.

NGK, a major supplier of original equipment oxygen sensors, builds this one with an advanced ceramic sensor element. This element includes a special coating that acts as a barrier against contaminants and deposits, helping to prevent poisoning and extend the sensor's life. This focus on the ceramic component, from raw materials to the finished product, is part of NTK's commitment to reliable sensor performance.