O2 Sensor Location Diagram - Welded Bung Before Catalytic Converter (Ford Bronco)

This is a simple hand-drawn schematic (created in a basic paint program) illustrating where to install an oxygen (O2) sensor in a vehicle's exhaust system. The drawing shows thick black lines representing exhaust piping: a downpipe/Y-pipe section at the top joining into a single pipe that leads down to an oval shape labeled "CAT" (catalytic converter), with the exhaust continuing beyond it. A red arrow points to a spot on the exhaust pipe just upstream (above) of the catalytic converter, at or near the junction where the pipes merge. The red annotation reads "Pipe welded in wit o2 sensor screwedin the end," indicating that a bung or short pipe stub is welded into the exhaust at this location, with the O2 sensor threaded into it. Small colored lines (blue, green, purple) near the sensor location appear to represent the O2 sensor's wiring. A reader can learn from this document the intended mounting location for an O2 sensor: welded into the exhaust pipe ahead of the catalytic converter. The document contains no year, make, model, part numbers, torque specs, or wire color codes — it is purely a positional illustration. It was uploaded to a 1993 Ford Bronco gallery, though the drawing itself is generic.