I have a 2016 Sport that has been trouble free, although my definition of trouble free and reliable is more lax than the average Joe's. Consequences of being a Jag owner (although I also consider that reliable as well).
So far, I've had the warranty replace the following on my 2.4L 9-speed Sport, with 27,000 miles on it. I have the extended warranty and I think that was a good idea.
- Brake discs and pads because a stone got stuck in one of them and caused a deep groove.
- Uconnect unit because a bad iPhone cable caused a short circuit. Don't leave a frayed iPhone cable connected to the USB port.
- Infamous fan assembly that shook. It was replaced with an upgrade metal backed unit that is much more robust.
- Engine and transmission mounts: Jeep was vibrating on idle when in drive or reverse. New mounts, which are a part that has been redesigned and superseded the original one cured the issue.
Of those four warranty repairs, only the last two were not induced by myself. Everything else has been regular scheduled maintenance. My dealer has been very eager to help, and I've never been without my Jeep for more than 6 hours at a time. Overall, I would say this is a very reliable Jeep. The problem's I've had are small compared to what I've seen with other vehicles.
One caveat, I do have a small disappearing oil issue. Mine is much less marked than other's have reported. Now you may be asking, why I call this a disappearing oil issue? It doesn't leak the oil, and it doesn't burn it either. The level just magically drops. I'm adding about 1/4th of a quart every 5k miles, which should not be the case on a new car, but it's not that bad.
Some believe the problem lies in the design of the Multiair system, which is a pretty clever system. If it results in a small oil consumption, then that is a small price to pay. However, others consume a lot more oil. Other theories include that the valves have not seated correctly, or that the 0W-20 oil is too thin and is burned off cleanly.
I really don't know what causes it, but despite it being a new car, you should be vigilant of the oil level.
I have not had the transmission problems others report.