One problem related to noises during shifting has been reported for the 2015 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Hyundai Sonata based on all problems reported for the 2015 Sonata.
There are many problems with this car, steering is #1 at low speed is makes a popping noise, at speed is has dead spots, entire steering assembly could be moved. The transmission is rough and feels like it is hunting and stumbling between 1/2,2/3 shifts, downshifts 1 or 2 ranges at the slightest hill. Back up camera comes on and then goes black in the middle of backing up. Brakes feel like they are slipping if you are braking at low speed on a hill, as in parking. I have taken it back to the dealer 3 or 4 times, they are unable to fix the problems, though they did manage to fix the moving steering assembly the 2nd visit wile denying they did any work. I have attempted to get Hyundai to buy this car back under the lemon law but they say nothing is wrong or it is not severe enough. . . I feel like I have to take a huge loss to trade it in on a dependable car or wait till something fails completely (hopefully not the steering) before they will listen to me.