福特致胜/沃尔沃氧传感器6G91-9G444-AAA/0258006927，环保升级首选

When your Ford Fusion or Volvo model experiences idle instability, abnormal fuel consumption, engine check light on, or emissions exceeding standards, the oxygen sensor may have aged and failed, failing to accurately monitor oxygen content in the exhaust. When functioning normally, the sensor continuously feeds the ECU with the air-fuel ratio signal to help precisely control injection, improving combustion efficiency, reducing fuel consumption, and lowering emissions. Compatible models include Ford Fusion (2.0L/2.3L) and Volvo S60/V60/XC60 with the same engine. OEM number 6G91-9G444-AAA (substitute for 0258006927). Installation must use a dedicated socket to avoid damaging sensor threads; operate while the engine is cold, ensure wire connections are secure with no poor contact.