Subaru Forester WRX Front Oxygen Sensor 22641-AA650 Direct Replacement

Subaru Forester and WRX upstream oxygen sensor (OEM: 22641-AA650) uses zirconia sensing element and high-temperature resistant stainless steel housing identical to the factory, signal stability comparable to OEM, more competitive price. It directly replaces the factory part without wiring modifications, continuously monitors air-fuel ratio and feeds ECU adjustments to injection quantity, ensuring combustion efficiency and emissions compliance. Installation difficulty: medium; use an oxygen sensor special socket to carefully tighten the new part.