What does the buzzing sound like? Like plastic panels rattling or bees?
I get a buzz when the engine is cold and I drive around 1-20mph but it sounds like it's in the dash above the CD insert hole.
44k miles with just one B solenoid replaced with an "updated version" a while ago hope it holds up *knock on wood*
1965 Mustang Coupe 289 4spd
2003 Land Rover Discovery II SE
2013 Lincoln MKZ Hybrid