The length of your trial subscription depends on the vehicle you’ve purchased or leased. There are several ways to find out.   Check the paperwork that came with your vehicle   Register and log in to your SiriusXM account   Look out for the Welcome Kit we’ve sent you, which includes information about your trial and when it will end   You can also log in to your account at Mopar.com and look for the SiriusXM module on your dashboard