I put 2 layers of duct tape on the rear lower portion of the plate and it serves to stop it from scratching the car and also from it rattling.

 

Hmm, good call, that could be causing a rattle for sure. My plates are both inside silicone plate holders and I haven’t noticed any loud rattling, though maybe a duller vibration noise when going over certain bumps.

 

Mine are also inside silicone plate holders but I found that the bottom portion of the rear plate was touching the car itself therefore would prob be the source of some rattling when driving over bumps or high speeds. So my thinking was that by putting 2 thicknesses of duct tape at the bottom of the plate gives it that buffer and stops it from ever scratching the paint.
And its totally hidden behind the plate so you'll never see it after you install it.

 

FYI, the rear plate doesn’t make contact on mine and is secured pretty strong from movement. Now I don’t use or like a license plate frame so there’s that too. No noises from the back (or at all) so far in 2+ months and over 6k miles.

 

I always assumed the plastic dealer plates produced any "thwack" sounds so I swapped out for those generic black silicone ones off Amazon as soon as I got my permanent plates.

Good luck with your continued hunt for the noises. If you end up adding a rear dash cam and the cargo lights, make sure those cables and harnesses are tightened down or padded as well, even if you are tired and exhausted from the install (learned the hard way). Added some new noises whenever I hit a bump or hump and had to go back in, lol.

 

Thanks for the helpful comments guys. And keep them coming.

Any chance of a photo of what it looks like on your vehicle, or a link? A quick search of Amazon I found tons that look like decent options.

 

Thanks for the helpful comments guys. And keep them coming.

Any chance of a photo of what it looks like on your vehicle, or a link? A quick search of Amazon I found tons that look like decent options.

Don’t know if it helps but here’s a pic of mine without a frame. This was a brand new plate straight and unbent. Once I tightened the bolts this is what resulted. Totally not worried about it smacking around. And as a bonus it looks like I can still clean up under there a bit.

 

+1 for silicone frames. The full backing ensures that no part of the metal frame can contact your paint or cause a rattle, and the edge covers keeps potential sharp edges covered, and drains in the bottom keep water from pooling and getting gross. And they look sleek and clean. These are the ones I got:

Amazon.com: Aujen Silicone License Plate Frames Black, 2 Pack Car License Plate Covers, Universal US Car Black License Plate Holders BracketsRust-Proof, Rattle-Proof, Weather-Proof ( Black) : Industrial & Scientific

Buy Aujen Silicone License Plate Frames Black, 2 Pack Car License Plate Covers, Universal US Car Black License Plate Holders BracketsRust-Proof, Rattle-Proof, Weather-Proof ( Black): Test, Measure & Inspect - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

www.amazon.com

 

Add this to the Prime accessories thread. Off to get one myself ...

 

Just ordered them. Thanks for the suggestion

 

Got mine today as well. I like the look a lot better than the clear plastic cover I had before.