My car is a 2017 Hyundai Elantra with 49745 miles on it. At times when I brake or slow down to brake at lights it vibrates and rumbles. What does it mean? I bought this car last April 2018 from Enterprise Car Sales.
That just recently happened to my 2014 Chevy Sonic, turned out that it was a faulty O2 sensor that was making the computer add to much gas into the engine. I'd suggest getting it checked soon, I waited too long and had to rebuild my engine.