How to Fix a Broken Reversing Radar?
2 Answers
If the reversing radar is not working, first check whether the power cord of the main unit is properly connected, and then check if the radar main unit cable has become loose. If neither of these is the issue, then the reversing radar module or buzzer may be damaged and needs to be replaced. Below are specific details about reversing radars: 1. Obstacles that are too low Generally, obstacles that are 10~15cm below the center of the probe may be overlooked by the radar. Moreover, the closer the obstacle is to the vehicle, the lower this height threshold becomes, increasing the risk. 2. Obstacles that are too thin Since the sound wave signals emitted by the radar probe are relatively narrow, there are significant blind spots when detecting very thin obstacles. Items such as road barriers used to block vehicles and the diagonal steel cables on utility poles can be hazardous. 3. Ditches and bumps The radar is designed to detect obstacles. If there is a ditch or bump behind the vehicle, the radar will not respond at all.
That day, the reverse radar at the rear of my car suddenly stopped beeping. As someone who often tinkers with my car, I first tried restarting the vehicle and checking for basic faults. If there’s mud or dust covering the sensor surface, the radar signal gets interrupted, so I gently wiped it clean with a soft cloth to see if that worked. Next, I checked the fuse box to locate the corresponding fuse—if it’s blown, it needs replacement, and all this is illustrated in the owner’s manual. If that didn’t help, I inspected the wiring connections for any looseness or damage, using simple tools to test continuity if necessary. If I still couldn’t fix it, I’d either consult a friend for joint diagnosis or head straight to a professional shop to avoid compromising driving safety. Remember, the reverse radar is an assistive tool—routine maintenance should avoid hard impacts and water exposure to prevent frequent issues. Regular cleaning during car washes can extend its lifespan.
