Nissan Sunny 2000-2004 2.0L Front Oxygen Sensor 22690-4M500 Emission monitoring stable and reliable

Nissan Sunny 00-04 2.0L fits front oxygen sensor 22690-4M500; installed on the exhaust manifold or upstream pipe; monitors oxygen content and feeds ECU to precisely control air-fuel ratio for efficient combustion and emissions. OEM 22690-4M500 designed for 2000–2004 Nissan Sunny 2.0L; installation difficulty moderate; estimate 30–45 minutes; protect threads during removal. If idle unstable, sudden fuel consumption rise, weak acceleration, or MIL lights up, suspect sensor replacement is needed to maintain driving experience.