Ethan Clarke
Rear-view mirrors are typically affixed to the top of the windshield on a double-swivel mount, allowing for adjustments to suit the height and viewing angle of the driver. Over time, rear-view mirrors can loosen due to vibrations from driving, direct sun rays, or bumping. This can cause dark spots or black edges to appear on the mirror. To restore a plastic rear-view mirror, you can either tighten the mirror ball joint or replace the mirror entirely. The exact method for tightening the ball joint will depend on your vehicle, but it typically involves removing the plastic housing of the mirror and tightening the screw that holds the mirror in place. If you choose to replace the mirror, you will need to purchase a rearview mirror replacement kit, which includes adhesive, cleaning supplies, and hardware. You will then need to carefully apply the adhesive to the mirror mounting hardware and install the mirror mount, following the manufacturer's instructions for glue cure times.
How to restore plastic rear-view mirror
| Characteristics | Values |
|---|---|
| Reasons for restoration | Loosening of the mirror ball joint due to adjustment by multiple users, vibration, direct sun rays, bumping with the head, jerking at the time of adjustment, or crashing |
| Tools required | Screwdriver (flat head and Phillips), glue, razor blade, crayon or masking tape, replacement mirror |
| Steps | 1. Inspect the mirror from underneath to locate the flip tab and screw. 2. Tighten the screw using the appropriate screwdriver. 3. If the screw is not accessible, remove the plastic shroud to gain access. 4. If the mirror is glued to the windshield, clean the surface and apply glue to the mirror mounting hardware. Use tape to mark the original mounting location. Refer to manufacturer instructions for glue cure times. |
| Precautions | Do not drive without a rear-view mirror as it is illegal in many places and can lead to safety hazards. If your vehicle uses advanced driver assistance systems (ADAS), replacement must be done by a professional. |
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What You'll Learn
Removing the plastic housing
To remove the plastic housing, gently pry it open with a flat-head screwdriver or similar tool. Be careful not to apply too much force, as you don't want to damage the plastic. You may need to apply a small amount of force to pop it open, as it is usually held in place by trim clips. Once you have pried it open, you can carefully remove the plastic housing.
With the plastic housing removed, you will now have access to the mirror ball joint and the screw. If your mirror has loosened over time, you can tighten the screw with a screwdriver to secure the mirror in place. This is a common issue with rear-view mirrors, as they tend to loosen due to constant vibration.
After you have tightened the screw and secured the mirror, you can reinstall the plastic housing. Simply snap it back into place, ensuring that it is securely attached. And that's it! You have successfully removed and replaced the plastic housing of your rear-view mirror.
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Using the right adhesive
There are a few options for adhesives when it comes to rear-view mirror repair. Firstly, you can opt for a rear-view mirror repair kit, which often includes adhesive components. These kits usually come with the necessary cleaning supplies and hardware for the repair. While regular strong glue may hold the mirror for a short period, it is best to use an adhesive designed specifically for this purpose.
If you choose to purchase a rear-view mirror replacement kit, carefully follow the manufacturer's instructions for glue application and cure times. Pay close attention to the included directions, as different brands of adhesive may vary slightly. As a general rule, this type of repair is recommended to be performed in temperatures between 50 and 75 degrees.
When applying the adhesive, ensure that you apply it to the mirror mounting hardware, not the windshield itself. Use masking tape on the exterior of the windshield to mark the original mounting location, and then install the mirror mount. This will ensure that your new rear-view mirror is installed in the correct position.
It is important to note that modern cars with advanced driver assistance systems (ADAS) in the mirror require professional replacement. These systems are delicate, and improper replacement can lead to calibration issues. If your vehicle has one of these systems, consult a professional for safe and proper installation.
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Reinstalling the plastic housing
First, it is important to understand the type of mirror and its attachment mechanism. Modern cars with advanced driver assistance systems (ADAS) require professional replacement, as these systems are delicate and calibration is necessary after installation. If your vehicle does not have these systems, you can proceed with the reinstallation.
Next, identify the attachment method. If your rearview mirror is secured with screws, tighten the screws using the appropriate screwdriver, such as a flat head or Phillips head screwdriver. Ensure that the mirror is firmly attached before proceeding.
If your mirror is glued to the windshield, follow these steps: Clean the surface of the windshield and the mirror mounting hardware with the provided cleaning supplies or suitable alternatives. Carefully apply the adhesive to the mirror mounting hardware, following the manufacturer's instructions for the specific adhesive brand. Do not apply glue directly to the windshield. Use the tape on the exterior of the windshield to locate the original mounting position, and install the mirror mount. Refer to the manufacturer's instructions for the appropriate cure time for the glue.
Once the glue is fully cured, reinstall the plastic housing. This typically snaps back into place with a bit of force, as it is often held by trim clips. Ensure that the housing is secure and properly aligned.
Finally, test the stability of the rearview mirror by gently trying to move it. Make any necessary adjustments to the angle and visibility. Always refer to the manufacturer's instructions or seek professional advice if you are unsure about any steps in the process.
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Fixing dark spots and black edges
Dark spots and black edges on rear-view mirrors are caused by what is known as "mirror desilvering" or "mirror rot". This occurs when excess moisture enters the layer between the silver and the backing, causing the bond to break and the silvering to chip off behind the glass and oxidise. This is especially common in moisture-rich environments like bathrooms.
To fix this issue, you have a few options:
Replacing the Mirror
One solution is to simply replace the entire mirror. This can be done by removing the mirror assembly from the car, taking out the old mirror, and installing a new one. However, this option may not be feasible for all car models, as some manufacturers may not offer the entire unit for replacement. Additionally, replacing the mirror may affect other features, such as the high-beam anti-dazzle function.
Re-silvering
Re-silvering involves replacing the silver coating on the back of the mirror. While it is possible to do this yourself, it is a time-consuming, expensive, and messy process. The chemicals involved, such as paint thinner, are toxic, and you will need to invest in the proper safety equipment, such as safety glasses, gloves, and a chemical breathing mask. Re-silvering may also affect the functionality of certain mirror features.
Using a Mirror Frame Kit
A more affordable and simpler solution is to use a mirror frame kit, such as those offered by MirrorChic. By installing a stylish custom frame over the edges of your mirror, you can hide the black edges caused by desilvering without having to replace the entire mirror or engage in the complex process of re-silvering. Mirror frame kits are DIY-friendly, affordable, and can transform the look of your mirror in under an hour.
Prevention
To prevent mirror rot from occurring in the first place, especially in bathroom mirrors, ensure that the room is well-ventilated and avoid allowing water to splash against the mirror. Consider installing a low-profile faucet or a washer in the faucet to reduce water flow and prevent splashing.
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Adjusting the mirror ball joint
To adjust the mirror ball joint, you will need to tighten the adjustment screw at the base of the mirror. This will tighten the ball joint connection.
If you cannot find a screw underneath the mirror or behind the plastic covering, your car may have a screw on the mirror itself that needs tightening. Before taking the mirror apart to look for the screw, refer to the owner's manual to locate the tightening screw. If you are more of a visual learner, you can also find video tutorials online that show how to fix a rearview mirror with a wobbling swivel ball. These videos often feature specific car brands, such as Acura, Ford, Toyota, and Honda.
Occasional cleaning and tightening of the mirror ball joint will help keep your rearview mirror in good condition. Normal wear and tear can cause the mirror to become loose or fall off, so regular maintenance is important.
If you tighten the screw and the mirror is still wobbly, it may be time to replace the mirror entirely.
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Frequently asked questions
You will need to use an adhesive to glue the mirror back onto the windshield. Ensure you purchase an adhesive that is suitable for this purpose. Clean the surface thoroughly before applying the glue, and carefully follow the manufacturer's instructions for cure times.
If your rear-view mirror is attached with screws, you will need to remove the plastic housing to access the screws. Loosen the screws with a screwdriver and adjust the mirror as needed, then tighten the screws again.
This is caused by excess moisture entering the layers of the mirror, causing the silvering to chip off and oxidise. The only way to solve this is to replace the mirror.
Aside from cosmetic issues like dark spots, your mirror may need replacement if the glass is cracked or broken, or if the adhesive fails and the mirror falls off.
Usually, you will need to replace the entire unit. However, some mirrors can be replaced, like those with auto-dimming glass or electrochromic technology, which can be sourced from car dealers.
