The oxygen sensor location is no secret. This part is a critical part of your car's emissions system. An oxygen senor works by generating an electrical current based on the difference in oxygen between the outside atmosphere and the engine interior. The Powertrain Control Module monitors the oxygen sensor and changes the air/fuel mixture based on the sensor's information.
Oxygen Sensor Location Tips
The oxygen sensor is designed much like a spark plug: a metal cylinder that screws into a metal surface and has wiring trailing out of one end. Exact oxygen sensor locations differ for each make, model, year and engine configuration. Your car's service manual should be considered the last word on the oxygen sensor location for your vehicle. That being said, here are some tips regarding general oxygen sensor placement: