Help with thse sensors on 3.2 M96
 

Can someone tell me what these four sensors are on top of my 3.2 M96 engine?

Brian :)

http://986forum.com/forums/uploads02...1584653777.jpg

#3 looks like a knock sensor, but take it with a grain of salt because I'm still learning about these cars.

I think
1)some kind of sensor for the secondary air injection
2)oil level sensor
3)knock sensor
4) oil pressure sensor

As Woody said:

#1 is the Secondary Air Injection cutoff Valve
#2 is both the Oil Level and Oil Temperature sensor. (Dual-Function sensor is unique)
#3 is a knock sensor
#4, I can't really tell what you're pointing at. But if it looks like the image below, then it's your Oil Pressure Sender.

http://986forum.com/forums/uploads02...1584732564.jpg