What are the reasons for the BMW 530li reversing radar having no sound?

[LeKeegan]

BMW 530li reversing radar has no sound for the following reasons: Radar itself problem: If the reversing radar does not sound, first check whether the host power cord is well connected and there is no current, then see if the radar host line is loose. If there is no problem, the problem lies in the radar itself. Check the bumper connection line: When the reversing radar does not sound, you can first check whether the bumper connection line is intact, and then check whether the reversing light is on when the reverse gear is engaged. If it is not on, check whether the reversing light connection switch is disconnected. Check whether the computer displays a fault code: You can check whether the computer displays a fault code. If these items are not problematic, then check whether the reversing radar itself has a problem.