http://www.bimmerdiy.com/

3-series and 5-series information....never found a site like this one....happy repairing....

Also the United Bimmer (http://www.unitedbimmer.com) community recently started a DIY archive of new, original articles. This will provide some unique DIYs, and more options for already existing DIYs: United Bimmer Knowledge Base (http://www.unitedbimmer.com/kbase.php)

It's not very big yet, but it's growing by a couple every few weeks. :)