Yes, I forgot which sensor plugs into which socket at the back of the engine.

If #1 is the 1st one coming out of the exhaust which socket does that go into?

The socket in the front is in line w/the axle and the other inline from front to back of the car.

Thought I had marked them but NO.........

 

Thank God Saab is smarter than me. The two plugs are different shades of grey and one will not fit in the other.