My car had another small issue pop up recently. Probably about three weeks ago, I got in my car and the radio reception was horrible. I could only get good reception on one of my preset stations. The others made lots of static noises and I couldn’t get the HD stations to come in at all.
My first assumption was it was some kind of electrical gremlin, maybe involving the antenna. Turns out the antenna mounted on the roof is not for the radio, but instead for things like GPS. Maybe everyone else already knew that, but it was news to me. Instead, the defrost grille built into the rear windscreen also serves as the radio antenna. A quick inspection revealed that one of the defrost lines had shorted which did not allow electrical current to reach the antenna.
Fortunately, there are some companies that make a defrost paint kit to allow you to repair the grid in cases like this. The color match is a little lighter than the paint used by the factory, but its such a small area that its practically unnoticeable, and sure is a lot cheaper than replacing the entire rear windscreen.
So if your radio reception goes bad suddenly, make sure to check the rear defrost before taking your car to the shop.