Underneath the rear diffuser of both the sedan and the coupe is a set of emissions components attached to the underside of the spare tire well. You can access these by removing the two nuts and three bolts with a 10mm socket and pop the two plastic retaining tabs with a flathead screwdriver.



The main component anchoring everything down is the vapor canister - which looks like a black plastic box with three hoses connecting to it. The vapor canister is held in place by a single bolt (12mm head) and a rectangular slot that fits loosely on a metal tab coming off the underside of the car. This configuration allows a fair amount of play enabling the canister to rattle and make unnecessary noise.



You can easily eliminate the noise with some foam tape or what I used: 3M mounting squares (essentially the same thing).



Remove the 12mm bolt and place a solid object underneath the vapor canister to support its weight. I unplugged the two sensors, but there is enough slack that this is not necessary.



I placed a single mounting square on the top side of the metal tab attached to the underside of the car. I left the adhesive backing on the exposed side and this combination ended up being perfect for eliminating all wobble in the vapor canister.



Here's a shot of the vapor canister reattached. You can just make out the white mounting square in place now (see small white circle in center of photo).



As an extra precaution, I trimmed some pieces of a mounting square to eliminate the play and rattle in this hose catch - because it was super noisy as well. YMMV.

I don't care who you are, this is MacGyver-quality work right here:



That's it. You're done. Now just reinstall your rear diffuser and cruise your neighborhood revving on anyone within earshot.

 

You need to do more write-ups...well done!

 

Thanks RMB, I appreciate the compliment!

 

Emissions components? Lol can I take it off and not get a check engine light? Wonder how heavy it is?

 

Very nice. In what situations were you hearing the rattle?