Hi XXXXXXXXXXX!
There is actually a factory bulletin about the engine mounts cracking (01-001/09). Dealers were to replace both engine mounts. If you are still under the factory warranty then they should be replaced at no cost to you. They actually changed to material of the rubber to fix this defect.
Auto Service Technician
ASE Master Technician, Mazda Master Technician, GM and Ford factory trained. 15 years experience!