I bought my JLUR last Monday, and the next day I had an ESS system service warning. Took it in this Tuesday and it turned out to be the aux battery. Can’t believe it was bad from the start. Not that I plan to use the ESS system, but I didn’t want a malfunction on a brand new Jeep. Poor design with that battery where it’s located. The genesis battery upgrade is how Jeep should have done it.