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Yea when i turn up the volume when listening to music the bass from the rear speakers cause the brake ligth (the red plastic) to rattle.... has anyone else had this problem.... and how can i fix that cause its really annoying. also it rattles not only when the music is turned up, like if you go over bumps and uneven roadways you can hear it...

 
Rep Power: 0

There should be more than just the light rattling. The whole rear lid (where the brake light is) should be rattling. Take it out, run something like thin rubber sticky on one side weather stripping along the edge of the lid where it meets up with the window. It should keep it from vibrating against the window. I also glued polyfill on the underside so it wouldnt rattle against the metal under it as well

Search next time BTW, this has been covered. After you fix that, you will find more rattles. Search for rattles or something and find what everybody did throughout their car. Mine is nice and quiet compared to stock