I have recently picked up a 2002 Boxster. I have noticed that there are gas smell coming into the cabin through the air vent. I looked at some previous posts and took out the battery to check the fuel sender unit. With the battery tray remove, I see gas all over the cap that keeps the fuel sender unit in place. See Picture
. Do you guys think I should replace the whole unit or just the O-ring? For anyone who has gone through this repair, what are some thing I should look out for? Thanks in advance!