Diagnosing 2011 Mazda CX-7 Rattle Sound (videos included)

[Achilles88]

Need help diagnosing a rattling sound. Mazda Dealership thought it was tensioner assembly and replaced it but the sound has persisted. I also recently changed idler pulley so it's unlikely to be that.

2011 Mazda CX-7 2.5L Automatic with ~46k Miles

Video Link: Morning February 6 Rattle

Video Link: Evening February 6 Rattle

 

[190683]

I have the same year and model. Almost double the clicks. I heard the rattle briefly, could be from a half shaft, steering, or shock. Without Mazda or another mechanic looking into it, there is no real clue.

 

[Achilles88]

@KruzinCX I am starting to think it's a heat shield of clamp from catalytic converter. Or possibly catalytic converter itself - though I have no codes and O2 sensors seem to be working fine.

Just want to make sure though - you heard the rattle clearly in those videos right?

Asking because I am filing a complaint against the dealership which got me to replace the tensioner assembly when that clearly had nothing to do with the noise since it persisted after - so want to make sure the noise is obvious to someone hearing it for the first time over video.