Took the Mini in for a few things, including the gas cap CEL - kept popping up even though it was tight. They did replace something (canister maybe?), which didn't fix it. They ran smoke and said there's a leak in the fuel ventilation hose, near the passenger's rear, and that it was probably due to rock/damage, so it is not covered under warranty. The hose itself is $121, and labor they will let me know, but I'm sure it will be outrageous. Thoughts on this? I'm sure I can do it myself, if they'll let me