I was trying to add bluetooth headphones to my phone as we were driving my 2021 Y and noticed “DEH-X4600BT” as one of the discovered devices. We were at the lights and thought it might be someone else‘s device next to us, but it did not disappear as we went on for miles. From internet search it appears to be some kind of Pioneer radio receiver harness. Wondering if others here have noticed it. And why Tesla might be using after parts.
