Chevrolet 2003-2005 Air-Fuel Ratio Oxygen Sensor 2344668-12583804 Precise Match

For 2003-2005 Chevrolet Silverado, Tahoe and similar models, fuel-oxygen sensor (OEM 2344668/12583804) installed on the exhaust manifold or exhaust pipe; monitors exhaust oxygen content in real time to precisely control injection. Replacement difficulty medium; 30-45 minutes; avoid thread damage. If idle is unstable, fuel consumption increases, acceleration is weak, or check engine light is on, sensor performance is degraded.