Renault Oxygen Sensor 8200437489 Replaces 8200830903/8200650085 High-precision detection

This 8200437489 oxygen sensor directly replaces the factory part; two compatible numbers, 8200830903 and 8200650085, are fully aligned for mounting with no wiring modification. It monitors the oxygen content in the exhaust in real time and transmits the signal to the ECU to precisely control fuel injection and maintain proper air-fuel ratio. Applicable to most 2.0L and 1.6L Renault engines, such as Mégane, Fluence, etc. After replacement, it can resolve high fuel consumption, sluggish acceleration, and rough idle, and emissions can meet standards. If you experience cold-start difficulty, exhaust smoke, or the engine warning light on the dash, this is almost certainly aging and needs replacement.