I have a 2007 Mazda 3 4 door sedan 2.0 liter. The problem is when I press the accelerator, I hear a lot of vibration on the passenger side. Please help... I've looked at a lot of questions and answers on here but that does not sound like a broken motor mount. You can only hear it inside the car.
I've tried listening outside while the throttle was being pushed, but didn't hear anything. What could it be?