Hi guys,
I'm new to the forums, just got my base insight last weekend..
So I am replacing the stock radio with an aftermarket one and thought I would help out with some info. Apparently the 2011 base has a different connector set than the LX or EX/EX-NAV do. From the picture I sent to Crutchfield they believe it is the 2006-Up Civic harness and antenna adapter.
Before I found this forum, I ordered what they had listed for the LX, which do not fit.
Here are the part numbers they are sending me to make it work:
12040HD10 - Antenna adapter
120701722 - Wiring harness
120997878B - Mounting kit
Here is the picture of the connectors I took last night.. I'll update this once I get the parts and install, but I won't have them until around Tuesday..
Also, The person I talked to is gong to see about getting the base model added to their database to prevent this issue again..