To all those with missing posts.
Your post should still appear under your list of posts in your Members Profile. Click on the "Profile" tab and scroll to the bottom and click on "Show the last posts of this person."
Find the post/thread in that list, and you should be able to view you 'missing' post.
Simply "bump" the thread and it should re-appear in the 'Car Parts' section.
Let me know how you get on!
Rich