OK. So I went out to start the car and see if the check engine light is still on after checking that the gas cap is tight (it is). When I turned the car off, there was about a 2 second buzz that went off, sounding like it was coming from behind the passenger seat. Never done that before.

I moved the seat forward so I could stick my head back there and get a better idea where it's coming from - but it didn't do it. It only does it when the seat is moved all the way back. That's really weird. Anyone got an idea what this is?

 

Bum subwoofer?

 

Base model. No subs.

 

I didn't know the base models didnt have speakers behind the seat that just not right