I bought a 2017 XLE AWD with 22,000 miles on October 5th. I read before I bought it about the many folks who had transmission issues. However, it was a good deal, and I thought I could follow the guide and have the ECU Updated for better shifting. I took it in to dealer on October 11th, and showed them the TSB article for updating the ECU. I got a phone call later that day and they stated the tech drove the car, and said that the ECU update won't do anything and instead it'll need a new transmission. Luckily, it was under warranty. Today, October 17th, I got the vehicle back, and I must say, the new Transmission shifts much more smoothly now. Here's hoping for a trouble-free experience!