
Rearview mirrors can be folded forward and backward. Whether they are electric or manual rearview mirrors, they can be folded manually. However, electric rearview mirrors contain motors and reduction gears, so they should be folded gently when adjusted by hand. Methods for Adjusting Rearview Mirrors: The interior rearview mirror is used to observe the situation behind the vehicle. When adjusting the interior rearview mirror, keep your head facing forward and glance at the rear of the vehicle with your eyes. If most of the rear window glass is visible, the mirror is properly adjusted. The exterior rearview mirrors are convex mirrors, which expand the field of view but slightly distort the size and distance of objects. Optimal Adjustment Angles for Rearview Mirrors: The best angle for the left rearview mirror is to have the road environment occupy most of the mirror surface, with only 1/4 of the vehicle body visible. Similarly, the right rearview mirror should also show mostly road environment. Since the right rearview mirror is farther from the driver's line of sight, the vanishing point of the road should be positioned at the top of the mirror, with the vehicle body occupying 1/4 of the mirror. The interior rearview mirror can be adjusted by hand so that the distant horizon is centered in the mirror.

A few days ago, my cousin lent his car to a friend, and when it was returned, the side mirror was completely bent out of shape. This is something worth discussing: it's fine to gently adjust the interior rearview mirror back and forth—it's just an anti-glare mirror supported by a single rod. However, you must never force the exterior side mirrors! Most cars nowadays come with power-folding functionality—after turning off the engine, press the button on the door with the curved arrow, and the mirrors will automatically click into place. If you push them forcefully like bending a toy, the tiny motor gears inside are sure to break. Replacing the entire assembly costs at least 500-600 RMB, and if the plastic clips snap, it’s even more troublesome. Remember this: see that black plastic ring where the mirror meets the door gap? That’s the limit for manual folding!

Running an auto repair shop for twenty years, I've seen too many cases of violently forcing side mirrors. Let me be clear: adjusting the interior rearview mirror about 30 degrees forward or backward is safe, but the exterior mirrors have a completely different structure. Under the mirror housing lie circuit boards and stepper motors - the forward/backward direction isn't part of their designed movement range. Some people think they can adjust the angle like flipping a mirror surface, only to hear the plastic cracking inside when they apply force. These repairs are particularly time-consuming, requiring door panel removal and base bracket replacement. Last month, a X3's mirror was broken by the owner's wife - the single part alone cost over 2,000 yuan. For daily cleaning, just gently push against the car body - don't apply brute force like you're wrestling with the steering wheel.

The most common sound heard at the driving range is a crisp 'snap'—inevitably, it's a student yanking the side mirror as if it were a handle. The exterior rearview mirrors can only be folded toward the door; they don't move forward or backward at all! They're secured by metal hinges and positioning springs, and forcing them backward can crack the mirror housing. Last winter, a student practicing reverse parking thought the mirror angle was off and tried to adjust it by hand, resulting in a dislocated hinge that tore the heating wires. During repairs, it was discovered that the anti-fog heating elements, resembling a spider's web, were adhered to the back of the mirror. Reattaching them required dismantling the entire mirror assembly. Now, when teaching, I emphasize: to adjust the angle, the engine must be off, and only the electric control button should be used.

As a car owner who frequently installs dash cams, I must remind you: The interior rearview mirror bracket is designed with a quick-release slot structure, allowing about 15 degrees of front-back movement to cushion impacts. However, exterior side mirrors are entirely different. Last year, I tried this on my old car—forcing it could make the rear housing hit the triangular window glass. Modern mirror housings are packed with turn signal wiring and blind-spot monitoring radar modules, while virtual mirrors like those on Audis are even more delicate. Once at a dealership, I saw a repair bill where a drunk owner manually forced a side mirror, causing a circuit board short circuit—replacing the camera-equipped mirror assembly cost over 8,000 yuan. Nowadays, premium vehicles even have sensors in the rear housing; slightly forceful contact can trigger the anti-theft alarm.

The most common mistake novice drivers make is treating side mirrors like manual transmissions. Here's the science: exterior mirrors can only fold vertically towards the car body, like a book hinge with unidirectional movement. Forcing them sideways is equivalent to tearing the pivot structure horizontally, which can dislodge the internal limit ball bearings. Last week in our neighborhood, someone forcibly bent the left mirror of a Mercedes C-Class - the mechanic showed me three out of six mounting tabs broken on the plastic base. Special warning for vehicles with memory function: manual adjustment may cause motor reset program errors, resulting in jerky movements with clicking noises during angle adjustments. The correct method is to check if the folding button has reset before starting the engine.


