Peugeot Citroën Oxygen Sensor 1618.R0/9657632980 Exhaust Monitoring Special

Peugeot-Cat/ Citroën oxygen sensor (OEM 1618.R0/9657632980/96368765) directly replaces original parts; broad compatibility across many Peugeot and Citroën models. Core function: monitor exhaust oxygen content and feed ECU to adjust air-fuel ratio; improves combustion efficiency. After installation, it effectively resolves high fuel consumption, weak acceleration, and engine fault lamp. If idle is unstable, exhaust emits black smoke or strong exhaust odor, sensor aging is likely; replace early to prevent catalyst damage.