Carrier/rack problems of the 2018 Nissan Altima

Radar sensor for aeb and fcw malfunctioning, turning off at random situations, braking when no vehicle is near, false alerts crossing rail road tracks, etc. Took to Nissan dealership under warranty but issue was not fixed since they claim to be because of potential prior crash. Vehicle has not been reported in a crash, and aeb is malfunctioning constantly to the point where it may be unsafe instead of a safety feature.

Second issue with my 2018 Nissan Altima. Was in the shop in October for the front collision sensor malfunctioning. Sensor was detecting obstructions when nothing was there. Local dealership replaced the sensor in October. Less than one month out of the shop (this week), the sensor malfunctioned again. Stated Feb: unavailable front radar obstruction and was steadily blinking again. Again, nothing in front of the vehicle that would have triggered the sensor. Contacted Nissan customer service and was advised to take the vehicle back to the dealership again for repair. Dropped vehicle to local dealership and was told they would look at the sensor and change out the bracket the sensor sits in to see if that corrects the issue. Very frustrated with this issue. .