I'm having excessive vibration on the cabin, and with a bumpy ride when accelerating. Strong vibration and bumpy felling at maintaining at 40mph to 55mph. I've been in the dealer for so many times. they check all front and rear suspension and all are tight. One day I found a thread about mazda 3 having problem on mount. would this be my problem? how can I check if my mounts are bad? I only got 37000 mileage. allot of driving everyday. vibration is strong at drivers flooring, feeling a loose under it. how many mounts are their in front to hold engine & tranny?