Hi, we have a 2018 Premium model, the 4 year warranty still covers our vehicle through May of '22. Buick had a 4Y 50K bumper to bumper and 6Y 70K on the drive train on 2018 models. Everyone should be utilizing these if you still have time left in the warranty. I watch Scotty Kilmer on youtube all the time, mostly for the entertainment, but have learned a lot about repairs and what causes a lot of issues. 5 years is actually pretty good for the battery considering that the computer's for the most part are always drawing off the battery. Additionally, I originally bought a bypass for the start stop system and didn't install it as my Buick dealer said it would void the warranty. A little research and all you need to do is put the car in L, Low, and toggle the shifter to 6 (on the dashboard). Subsequently, the car will drive the same as if it is in D but will not engage the stop start feature when stopped. Better to bypass it as starting and stopping the engine is where the most wear, battery too, takes place on the car (again a Scotty Kilmer tip). Even though they claim heavier duty components, it is still better not to be bothered with it, the gas savings is negligible at best, the wear is greater and even though the system is pretty seamless I still found it an annoyance personally.