BSW X5 Enclosure Installed - Question

[RJRDenver]

So I completed the install of my BSW enclosure and amp and the sound the 8" sub puts out is great. I have one minor issue, which I'm sure I'll be able to fix, but I'm hoping others can share their solutions and possibly get some feedback from Micah at BSW. The bass from the sub is vibrating the gas door and its pretty tacky to hear from outside the car. I've got the sub tuned down because I wasnt looking for a pounding solution, so I'm a little surprised its doing this. Anyone else had the same problem ?? What have you done to solve it??

[ESP]

Haven't done so on an X5 but on other cars I have used Dynamat (or other similar sound deademing material) on the fuel filler door (inside of course). Also works very well on those rattling license plates too.

[Ken@BSW]

The resonance you are speaking of is fairly common with our xh108 subwoofer system. When you open the gas tank door, there are 2 plastic pieces that act as 'stops' (for lack of a better term). Those plastic pieces are what is creating your noise. You can simply remove these, and use something such as rubber cement, a tiny bit of RTV sealant, etc., then put them right back in. This will hold those plastic parts in place so that you can enjoy your music without letting the kids on the street realize you have all that bass!!!