35655-ZY3-003 Oxygen Sensor - Overview. The 35655-ZY3-003 Oxygen Sensor is an essential component of Honda marine engine systems designed for Active Marine outboards. This sensor monitors oxygen levels in exhaust gases to optimize combustion, enhancing performance and lowering emissions. Engineered to fit seamlessly with Honda's fuel management and emission control systems, it ensures reliable engine operation while meeting factory specifications.. Key Features. Measures oxygen content in exhaus