Toyota Repair: 99 rav4 4dr 4wd, o2 sensor, cat converter

Question
Is the rear O2 sensor right behind the cat converter underneath the vehicle on the pass. side? I bought an original replacement part, but it doesn't look exactly alike. Also does it plug in underneath the passenger seat? thanks!

Answer
Yes, the #2 O2 sensor is located behind the converter, the electrical connector is under the seat, I find it easier to remove the seat to do this, take the sensor you bought back, it's obviouly the wrong one if it doesn't look exactly the same, tell them you need the #2 sensor.