If any of the vital anti vibration mounting rubbers fails, it can lead to hairline cracks of the metal or plastic part of whatever they are supposed be protecting.
These are inexpensive items that if renewed when the old item has degraded, will ensure no expensive replacements or repairs will be required on the item it is protecting.
To ensure you are aware of where all the anti vibration mounting rubbers are on your machine, try browsing the online schematic and the Products Gallery.
Why not order all the anti-vibe components you require at the same time - save money on shipping costs with a multiple order! This item should be renewed along with the other components that make up this assembly.