No idea if normal but it doesnt seem to affect anything.. When starting the engine or on auto/start stop it sounds like a weak turn over sound like the vehicle cant start but it starts fine, just describing the sound. Seems like it comes from the back of the vehicle. Does anyone notice this in theirs? It doesnt happen everytime but it does it quite a bit. Just wondering if normal or not. I do have a service appointment for next week for the service engine light that came on but has since gone off so was thinking of canceling. but this noise on startup I was trying to gauge if its normal or not from other owners. I would think I would get some service engine issue if it was an issue.It starts back up fine, its just a strange cranking sound on restart.