That sucks! The diagram in the 2019 owner's manual suggest it heats the entire center section of the seat. The Gen1 diagram that zroger73 shared fits my experience of the area the seat heaters actually heat up.... The heat doesn't seem to go more than a few inches above my belt line however. I probably wasn't able to feel it before as I usually have it set on low and only keep it on a couple of mins when I first get in the car. My coat probably was the reason I wasn't feeling it. ...