I recently bought a used Hyundai sonata 2016 4 days ago, before buying any car Its common sense to test drive It of course right? Before I bought the car we test drove it for miles, absolutely no problems thats why I bought it. Thats until I drove it a second time, the car turned on perfectly thats until 3 mins into driving I heard a weird drill like noise coming from the front of the car. Not only that the car kind of jerked (not a lot but it felt like it forced itself a little if that makes sense?) it then went away and came back 3 more times on and off. Like I said its a weird drill like noise. I then took it to car shop where they then continue to plug in the car to the computer to detect and scan the whole car to see if there was an issue with either the engine or something like sort but to our surprise it  passed! We even attempted a second time and like I said it passed no issues detected so what could this be I’m so upset that I just bought this car and I’m already having problems 🙁 what do I do?