I just bought an 07 STI and inspected it after buying it (bad idea) it has been modified a lot. The main harness is wrapped in electrical tape and a lot of it is unplugged. I'm actually wondering if the engine has been swapped from the original EJ257. So that is my first question, how can I tell if it is the original motor? I saw a post saying it's stampd on top of the block but I don't see it anywhere. Here is the motor
https://imgur.com/Dy5lkPx The other questions I have go along with pictures I took.
This is a sensor on the passenger side rear of the engine. Not plugged in and didn't see and plug in for it anywhere.
https://imgur.com/TeiD2VF
This part was just laying on the driver side of the engine compartment plugged in.
https://imgur.com/Dm7wJzk
Is this a oil pressure sending unit of some sort?
https://imgur.com/B12quM5
This is on top of the muffler. What is it?
https://imgur.com/1xIrHU1
Thanks.