While inspecting my engine bay, I found an unplugged connector and traced it back to the wiring diagram for my 03 350Z. According to the diagram, it’s labeled as "Not Used," but when I looked at the 04 diagram, it shows it as being for the Power Steering Pressure (PSP) Sensor.

I’ve read conflicting information—some sources suggest the 03 does have the PSP sensor, but I can’t seem to find it anywhere on my car. I’ve checked around the power steering lines, but no luck.

Does the 03 350Z have the PSP sensor, or was it only introduced in the 04 model?

Any insight would be appreciated!