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Why can the rearview mirror only be adjusted up and down but not left and right?

2 Answers

McJosiah

07/29/25 3:32am

The reason why the rearview mirror can only be adjusted up and down but not left and right is due to poor button contact; misalignment of the white screw inside the mirror; damage to the motor gear or failure of the wiring harness. Below is some information about rearview mirrors: 1. Introduction: The rearview mirror is a tool that allows the driver to directly obtain external information about the rear, side, and lower parts of the car while seated in the driver's seat. 2. Function: For the convenience of the driver's operation, to prevent traffic safety accidents, and to ensure personal safety, all countries require that cars must be equipped with rearview mirrors, and all rearview mirrors must be adjustable in direction. 3. Mirror shape: It can be divided into three main series: flat mirrors, spherical mirrors, and double-curvature mirrors. There is also a prism mirror, which has a flat surface but a prismatic cross-section, usually used as an anti-glare interior rearview mirror.

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LondynMarie

08/12/25 7:22am

My car had the same issue before – the rearview mirror could only move up and down, with no response at all when trying to adjust it left or right. At first, I thought the adjustment button was stuck, but pressing it hard for a long time didn’t help. Later, I asked a car-savvy friend to take a look. He said this kind of problem is usually caused by the small motor inside the mirror responsible for left-right adjustment failing. Of course, it could also be due to poor wiring contact, especially the wiring harness near the door hinge, which is prone to wear and tear. Another possibility is poor contact in the adjustment switch’s terminals. That time, my friend disassembled it and found the motor bearing was seized. After lubrication, it barely worked, but in the end, I had to replace the entire mirror assembly. For such issues, it’s best not to force the mirror manually, as it could damage more components. It’s better to have a professional check the wiring and motor condition.

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