Zhisheng 2.0T 2011 Rear Oxygen Sensor 6G91-9G444-AA 0258006927 66cm Cable Length

When your Zest 2.0T (2011) shows the engine warning light, abnormal fuel consumption, reduced acceleration, or exhaust black smoke, the downstream oxygen sensor may be aged or failed. This sensor monitors exhaust oxygen content after the catalytic converter and feeds the ECU to adjust fuel injection for emissions compliance and fuel economy. OEM number: 6G91-9G444-AA; corresponds to factory models 0258006927/928; fits Zest 2.0T produced after 2011; cable length 66 cm. Installation must be done cold; mind sensor harness routing to avoid contact with exhaust or underbody components to prevent heat damage.