2013 Toyota Highlander Hybrid gets bad AM radio reception

The car radio reception for any AM stations is non existent FM works fine and Satilite works great, but AM gets no reception at all. How can I fix this problem

AM is vertically polarized and requires a good ground plane to get any reception. If the antenna is not grounded properly, it won’t work. FM is horizontally polarized and does not need a ground plane.

No one listens to AM radio anymore.

@RickDavis this thread was from about a month ago and may be of interest.

Can you fix terrible AM radio reception?