034-111-2000 - 034Motorsport O2 Sensor, 4-wire Narrow Band, High Quality

4-wire, High Quality Narrow band Oxygen Sensor. Standard Threads 18mm x 1.5, substitute for any Bosch or NTK sensor.  This is the sensor that our 034EFI ECUs were programmed to use as well.

There are 2 possible wire color versions, see below:

Black = Blue = Signal O2 output

Gray = White = Secondary ground

White = Black = Ground

White = Black = +12v Power