Mazda Familia 1.8L Rear Oxygen Sensor FP48-18-861 Economical and Affordable

Mazda Premacy 1.8L rear oxygen sensor aging leads to air-fuel ratio drift; OEM FP48-18-861; replacement uses high-temperature stainless steel housing and ceramic sensor element with OEM-consistent manufacturing precision; durable 30k-50k km in normal conditions; monitors exhaust oxygen and feeds ECU to adjust air-fuel ratio; installation requires dropping undercarriage connections and using a dedicated socket to avoid thread damage.