I have removed the sensor from the exhuast system but am having trouble unclipping it. I see a green clip that I pushed down, but it won't come apart. It seems like there is a top section, middle section and bottom section?

Any info would be great!

 

Yeah it a really hard clip to open. You gotta push the clip all the way down, when it reaches the bottem the other half should pop out

 

thats what i figured, thanks for the info