Just bought a 2015 Sonata SE with the standard 2.4 liter engine. At 35 mph and ~ 1,300 rpm the engine makes a low frequency sound similar to a rumble. This happens especially when going up an incline. Dealer says diagnostic shows car is fine but that sound does not seem to be a happy one.
Any advice?
Thanx
---- Diogenes
The wars are long, the peace is frail The madmen come again . . . .