I have an '02 with 16K miles on it, and I've been to around 10 autocrosses (~100 autocross miles) on a pretty rough surface. Over the past couple months, I've found a loose nut AND a loose bolt that DON'T match in the passenger floor board. I have tried to look up under the dash to see where they came from, but can't see anything missing. Have any of you experienced this, or have any suggestions?