I wanted this at one point in time...but its basically impossible. The usdm version at least as that is were I am from. If your guys' accord euro is exactly the same as our tsx(cl9 as well) then I guess you could try taking out the spare tire and putting your sub in there. And if you have an amp small enough you could maybe put it under the front passenger seat. Your also going to need more then 1 4 channel amp as well to power your sub.