only passenger side blind spot working why
I don’t know, but that sounds like something I would have the dealership take a look at
The Blind Spot Monitoring (BSM) system uses two radar-based sensors, located inside the rear bumper fascia , to detect highway licensable vehicles (automobiles, trucks, motorcycles, etc.) that enter the blind spot zones from the rear/front/side of the vehicle.
The simple answer is…………something is broken.
Has the vehicle suffered any fender benders?
this is for a ford fusion but it will give you the idea what to look for…
FORD BLIND SPOT SYSTEM MALFUNCTION REPAIR - YouTube