This Grommet helps keep the wiring from chafing, but because it is rubber, it has a limited service life. U.V and general wear and tear will eventually render it a useless eye sore!
So, don't leave it too long to replace with this top quality OE part, it does not cost much after all.
To view other essential consumable items like this, try browsing the online schematic and Product Gallery for your model, and save money by protecting now rather than expensive replacements later! Add as many items as you wish to your shopping cart and pay just one fixed price shipping cost.