Just as a test, the next time someone takes their hybrid in for service, find a marginal AM (or FM if you want to check that) station before you turn the vehicle over. Then enlist a salesman and go out and listen to the same station in a regular 2006 Civic and see if there is a difference.

Just a thought, then you'll know if this is a Civic thing or a Hybrid antenna system thing...

Oh yeah then post what happens here...

Scott