What are the reasons why the rearview mirror does not automatically tilt down when reversing?
2 Answers
The rearview mirror not automatically tilting down when reversing may be due to a malfunction in the power folding feature. Common reasons for power folding failure mainly include the following two aspects: Battery disconnected or dead: In this case, the exterior rearview mirror must be reset to function properly. The specific reset method is to manually operate the folding button. Manually folded the rearview mirror: After setting "fold the mirrors when locking the car," if the mirrors are manually folded, they will not automatically unfold when the vehicle is unlocked. You need to enter the vehicle and press the button on the door to manually unfold the exterior rearview mirrors.
The auto-dipping function of my car's rearview mirror suddenly stopped working. Upon disassembly, I found metal debris jammed in the motor gear set. This power-folding mechanism is particularly prone to sand ingress, especially after driving through construction sites. I should have noticed earlier when there was abnormal noise during the left mirror's folding. The module's power supply is normal, but the angle sensor was half-clogged with mud, causing the system to misjudge the position. Using a high-pressure washer at the mirror base during car washing actually pushed the dirt further inside, making it worse. Next maintenance, I'll ask the technician to focus on cleaning the track groove and apply some waterproof grease to the gear set.
