Just had the reverse lamp bulb out error error today and hastily checked the bulb holder and harness, praying that it had not caused any damage. Bulb was fine and the bulb holder and harness were pristine on both sides. I'm assuming this is the beginning of the grounding issues, so being proactive, I'm going to install a ground wire tomorrow!
2008 550i Sport-a.k.a. Hot Kraut Garbage
2006 Corvette Conv, Z51,6sp (wife)
2007 Honda CBR1000RR Sold
2005 Triumph Daytona 650 (wife) Sold