Subaru Forester Impreza Oxygen Sensor 22641AA381/192400-2120 Dual Number Matching

Subaru Forester, Impreza oxygen sensors (OEM: 22641AA381/192400-2120) mounted on the exhaust manifold or front pipe; monitor exhaust oxygen and feed ECU to precisely control air-fuel ratio, directly affecting combustion efficiency and emissions. Dual-number compatibility ensures OEM compatibility for Forester and Impreza models. Installation difficulty moderate; 30-60 minutes; avoid thread damage or harness pull. If idle is unstable, fuel economy rises, or acceleration is weak, check and replace promptly.