edit: sorry title should say ' clutch '

I got my coolant flush and throttle body cleaned today at the dealership but they said they could not find my OBD port which is usually located under the Gas Cap release button. .I am searching for it but cannot find it either, any ideas? Could it have been removed by the prev. owner? I have only had the car for 3 months now.

Also lately my clutch has been letting out quicker than usual, after I push the clutch in I let it go out slowly. It releases the same speed but it lets out quicker/lower. I have also seen a small power loss in the lower RPM range 2500 - 3500. Power doesn't really kick in till 3500+ any ideas on what the issue is? A Nissan Tech drove it around and said it was fine but it doesn't feel the same to me.
Thanks a lot

 

P.s.

this guy is having the same symptoms

https://my350z.com/forum/maintenance...ml#post8381096


also I have 30k on the car