I have searched the internet and found very few links to my problem so I'll ask you guys....

I have a 2007 M3 S Hatchback with approx 145k - live in Ontario.

There's rust developing on my rear hatch door - in three places - all the bottom angles of the rear window (bottom middle and both sides)

At first I thought about doing the repair myself... but with rust appearing in different spots I though may be I should just replace the whole outside "shell" of the door.

Has anyone else had this issue?

What are your thoughts?

Thanks!