Why is the reversing camera guide line not matching the actual situation?
2 Answers
Because dedicated cameras are usually installed above the license plate light, and the license plate light is not in the middle of the car, the guide line is not accurate. Typically, using a universal car camera allows installation in the center, so the reversing guide line will be in the middle. How to interpret the reversing guide lines: Red line: Indicates a warning line, with a distance of 30cm from the rear of the car. When the car reaches near this line, the parking space is just right, and no further reversing is needed. Yellow line: Indicates a deceleration line, with a distance of 60cm from the rear of the car. You can continue reversing but should slow down and check the distance. Green line: Indicates a normal safety line, meaning there is still plenty of distance between the obstacle and the rear of the car, so the driver can reverse with confidence.
Yesterday I encountered this exact issue - the parking guide lines on the screen didn't align with the rear bumper when reversing, which gave me quite a scare. Probably the camera got knocked out of alignment after that rough off-road trip. I tried fixing the bracket myself with a screwdriver, but it was still off by about two finger-widths. Only when I visited the repair shop did I learn that changing tire sizes or modifying suspension height invalidates the factory calibration settings. The technician had to use a diagnostic tool to remap the camera parameters, and the whole process took half an hour. Daily maintenance like checking for branch scratches or mud buildup on the camera is crucial, as these minor factors can throw off the calibration.
