Haval H8/H9 WEY VV5 Front Oxygen Sensor 28404042/28478384 Precise Match

Haval H8/H9 and WEY VV5 front oxygen sensors 28404042/28478384 use high-temperature ceramic cores and sealing structures; durable for normal service life. Monitor exhaust oxygen content and feed ECU to ensure stable air–fuel ratio. Replacement difficulty medium; use a dedicated socket to avoid thread damage and avoid pulling on wiring. If fuel consumption is abnormal or the fault light is on, replacement of the original is recommended first.