How much damage does installing a rearview radar cause to the original car?

[MarcusFitz]

Installing a rearview radar can cause significant damage to the original car. Below is an introduction to precautions when reversing: Reversing method: Before reversing, first check the situation behind the car, estimate the path of movement, and ensure that the front of the car will not hit any obstacles. Try to avoid stepping on the accelerator when reversing, and control the speed to avoid going too fast. Depending on the direction the rear of the car needs to move, use the left hand to turn the steering wheel. If the rear needs to move to the right rear, turn the steering wheel to the right. Conversely, turn the steering wheel to the left. Precautions: During the reversing process, do not keep looking at the rear. While ensuring the safety behind the car, it is necessary to occasionally observe the left and right rearview mirrors, pay attention to the distance between obstacles and the car body, and accordingly use the steering wheel to adjust the position of the car while reversing. If you feel that the front of the car might hit an obstacle during reversing, you should also check the front of the car at the appropriate time.

[PhoebeRose]

When I used to work on cars, I often saw cases where rear parking sensors were installed. The biggest damage was caused by improper installation leading to damage to the original wiring. Novices drilling holes themselves might hit the car's body panels, causing rust or water leakage. Unprofessional wiring can mess up the original wire harness, leading to short circuits or blown fuses. Some car models have sensitive electronic control modules, and external devices drawing too much power can cause the battery to fail prematurely. Also, if the radar sensors are misaligned, they won't detect accurately, and water ingress during rain can cause them to fail directly. I recommend going to a professional shop for installation. They understand the circuit layout and use the factory-reserved mounting points, avoiding 90% of the problems. Otherwise, repairs could cost more than the sensors themselves.

[VanAva]

Improper installation can damage the car: Drilling holes compromises the body's sealing and causes rust; Low-quality radars consume excessive power and accelerate battery aging; Random wiring may burn out the BCM (Body Control Module). The original vehicle circuit design is precise, and forcibly connecting parallel devices can interfere with the reverse camera signal. Choosing an OBD plug-and-play radar is the safest option, as it requires no wire cutting and draws power through the diagnostic port. The one I've been using has had no issues for two years.

[LaGemma]

I've modified five cars, and the damage caused by reversing radars mainly falls into three categories. Physical damage: Drilling mistakes can scratch the car paint or damage the internal brackets of the bumper; Electrical risks: Stripping wires to connect to the positive power supply may cause overheating of the circuits, and I've seen cases of spontaneous combustion; System conflicts: The radar frequency can interfere with the original parking assist function, leading to frequent false alarms that require resetting. I recommend using magnetic temporary radars that don't require drilling and won't damage the car, and can be removed after parking.