KennyLe

Hello, this is my first post and first car, i got a Lexus RC350 Fsport while driving on freeway the BSM system was working fine and suddenly it started to rain then the "Check BSM System" msg came on my dash, at first i pressed the button turn off and on it's worked for 2 miles and the same BSM light came on again.
I have tried !
Cleaned the bumper and mirrors.
Reset the battery.
Reset the power mirrors by playing around.
Nothing worked and..... No Beeping for the Rear Cross Traffic Alert, it used to Beep Beep when put in reverse and someone or cars behind.
Thank in advance for your help.