I have a 2016 Eco Diesel with 30,000 that is a pleasure to drive. One of the features that has helped me more than once is the blind spot warning, however I am unable to locate the sensor.
What I have observed is that the bumper of the car on my left is about even with the posterior of the rear door when the sensor signals and ends when the rear bumper leaves that area of the rear door. No sensors seen in this area.
Fun car...
\rtc