Mitsubishi Oxygen Sensor Set of Four MN158916 MN158670 MN158917 MN158918 Full Set Replacement

This set of four Mitsubishi oxygen sensors (MN158916, MN158670, MN158917, MN158918) matches OEM quality, using high-temperature ceramic cores and precise welded structures; tested on a bench to withstand high exhaust temperatures without early signal drift. OEM numbers correspond to Mitsubishi factory specs, compatible with several Mitsubishi models including Outlander and Pajero Sport equipped with 4B-series engines. Function: monitor air-fuel ratio and feed to the ECU to ensure combustion efficiency and prevent increased fuel consumption or emissions. Installation difficulty is moderate; requires removing sensors near the exhaust manifold, use a dedicated socket, avoid pulling wires; capable repair technicians can perform it, but consult the manual for initial operation.