Dealer should warrenty it if its only a month old. Well atleast my dealer will. Problem is if the boot is torn they might say it was a failur due to improper maintenance. Boots should be checked regularly for tears, once sand water and mud get in there its only a matter of when the cv will fail. Friend of mine bought a 2015 650 xmr 2 weeks ago. Tore the boot on the first ride and dealer replaced it under warrenty. Its no out of pocket expence for the dealer to do a warrenty repair thats gets billed to brp, its just weather or not ur dealer wants to do the paperwork and the job. The sales manager at my dealer told me flat out, he loves doing warrenty work cuz its top dolar paid to the dealer so he does what ever he has to do in the paperwork to get the approval from brp. But do what muddinmike said and clean her up real good. Warrenty techs absolute hate it when they have to work on a machine thats raining mud and sand when they crawl under it, belive me im a warrenty tech lol