Choose your harness and O2 sensor Select without a harness or with a 3 ft, 6.5 ft, or 15 ft unterminated harness, then choose with or without a Bosch LSU 4.2 O2 sensor. Your selected harness and sensor are included in the displayed price. Description Downloads The 3-in-1 NanoPRO is a Wideband O2 Sensor Controller, Dash Display, and Switch P