How do I gain access to the stock sub I replaced my headunit and added subs and need to remove that blown one because it distorts sound quality

 

Access is from above and requires removal of the rear seat, then the parcel shelf panel. Not difficult, but time consuming. Seat bottom first, then seat back, then the shelf which has the subwoofer screen.

Is the old amp/sub still connected? Or did you mean the sub is it rattling even though it is not connected?

You can edit your title to say "sub" instead of "sun." You have 24 hours from the original post time.