So I noticed I had an exhaust leak. I jacked up the car, tightened the bolts. That was it. Now when I went to go for a joy ride to celebrate my victory I had a weird knocking noise as I was backing up, I mean loud and I could feel it. I pulled forward and I felt it there too. What did I do? Attached video.

 

Doesn't matter figured it out. When I tightened it I guess it went a little crooked and pointed diagonally up. So now the sensor was hitting the axle....

 

Omg I think my test pipe is upside down .... ROFL

 

....oboy

 

Hi, I'd like to buy a new sensor please...