Socket panel for my E92 was only like $16 each. I replaced the right one, it went away. To remove the panel takes less than 10 seconds you can complete the entire swap in less than 20 seconds. I decided to replace both sides for the heck of it, though I didn't need to at the time.
I have a thread, look it up, it has the CC ID code in the title.
Weirdly, just playing around with the left panel at a much later time to check something else out, I set off a code for this side (with the newer panel in place). So weird. I put the old panel back in, and code disappears. Strange, eh?
Anyway, I did try the electrical contact cleaner, it didn't solve the original issue at the right side.
If your issue for some reason has to do with the inner tailights (which I'm doubting), those are more work to remove, but still not difficult.
Last edited by Ilovemycar; 02-15-2013 at 04:58 PM.