Carrier/rack problems of the 2018 Nissan Sentra

Just before I hit 1000 miles, the front collision sensor started beeping at random times whether the vehicle was stopped or in motion and ultimately, it had to be replaced. Dealership told me they have seen this happen a lot on the 2018 model Sentras. Also, the guard in the inside track of the driver door came off twice and I had to fasten it back on. I did buy it off the sales floor so a lot more people were in and out of it but I still do not feel like that should happen on a brand new car. Last, my 2017 Nissan never had problems with the bluetooth but this one constantly kicks me off of calls but was told nothing could be done until dealership catches it in the act. Overall, I love the safety, comfort, and feel of my car, just wish the bluetooth would work right.

Emergency brake assist has been acting from. The day I purchased the vehicle. . . Then I was in a car accident then it got worse, they replaced the bracket and sensor and they problem still remains. . . Actually I worse then before everytime I use my signal ot goes off when I'm approaching a hill it goes off.