 After owning many Titans, I opted for the diesel when it came out to better suit my needs. Truck started acting up exactly two days after purchasing. Hard shifting, check engine light, speed limited to 5mph due to def malfunction. Several trips to the dealer and almost a month without the truck, def tank was replaced and that was the only problem solved for a l short period of time. Other issues included nav screen going blank. iPod not working. Hard steering. From away at link fell off. Very poor fuel economy towing a 18' car trailer with a Kawasaki mule on the back (8mpg). After going back and forth to the dealer while continuing to pay $1000 a month for the truck, Nissan bought the truck back as a lemon.  Cummings engine has no power at all. It's a dog! Aisin transmission doesn't seem to know which gear it should be in and bangs in and out of gear. Def system that's Manufactured by a German company doesn't work but once in a while. Pretty much everything that didn't fail was actually made by Nissan. Everything else failed very rapidly**UPDATE**Purchased another titan xd after the first one was purchased back.  Second one is also getting purchased back due to several quality control issues