I am worried because my car is 2015 and, only after a week of purchasing it, I'm already having problems. I have been saved from many accidents, as it suddenly happens that, when accelerating, the car does not respond properly. This has even happened to me when driving on the highway, I tried to speed up, and nothing! The worst thing of this is that no one can find what is wrong with it.
Most probably, you will need to change the throttle body. I would be worried if your car made a particular sound. Check if, with the engine already warm, after driving for 20 minutes or so, you stop, leave the car in Dead centre, start to accelerate it slowly until 2000-2500 rpm and it makes a sound like this one: Https://www.youtube.com/watch?v=avE8BEpBLVg