What is the housing of a car's rearview mirror
The housing of car rearview mirrors is mainly made of plastic, with common materials including ABS, ASA or PC/ASA alloys. Some high-end models are equipped with metal brackets (such as aluminum alloy or iron brackets).
Material properties
Youdaoplaceholder0 ABS/ASA/PC/ASA alloy : These materials possess properties such as weather resistance, UV resistance, and impact resistance, making them suitable for long-term exposure to outdoor environments. For example, the rearview mirror housing of Tesla Model 3 has been reinforced with glass fiber, and its anti-deformation ability has been enhanced by 40%, allowing it to be used in an environment ranging from -40℃ to 90℃.
Youdaoplaceholder0 Metal brackets : Some models use aluminum alloy or iron brackets, which offer stronger support and durability, but they are more expensive.
Functional design
The interior of the shell usually integrates components such as turn signals and wipers. Some high-end models are also equipped with functions like electric adjustment and anti-glare.
The rearview mirror housing of a car mainly undertakes the following core functions:
Protect the internal structure
The shell is made of high-strength plastic (such as ABS, PC/ASA alloy) through injection molding, which can protect precision components like lenses and turn signals from external damage, and at the same time prevent rain and dust from entering the internal circuit system. If the casing is damaged and not replaced in time, it may cause circuit faults or blurred vision.
Enhance driving safety
Some models feature an integrated air duct design on their shells, which can reduce the wind resistance coefficient at high speeds (by up to 15%) and minimize noise interference. The turn signal is integrated into the housing, providing a dynamic warning function to enhance safety when changing lanes or turning.
Maintain visual clarity
Aging of the shell (such as yellowing or cracking) will reduce the light transmission of the lens, especially in rainy days or at night, resulting in weakened lighting function. Regular inspection and replacement of aged casings can keep the reversing view clear and reduce driving safety hazards.
After the rearview mirror housing of a car is damaged, it can be repaired or replaced according to the degree of damage: minor damages (such as small cracks or scratches) can be temporarily repaired with glue, paint or film. In case of severe damage (such as extensive cracking or loss), a new casing or assembly needs to be replaced to ensure water resistance and functional safety. When dealing with , priority should be given to preventing rainwater from seeping in to avoid internal short circuits. It is recommended to choose DIY or professional maintenance based on your own skills.
Select the treatment method based on the degree of damage
Youdaoplaceholder0 Minor damage (small cracks, scratches or partial cracking) :
Use automotive-specific adhesives (such as epoxy resin) or hot melt adhesives to bond the cracks and ensure sealing.
For minor damages that affect the appearance, they can be repaired by painting: sand the edges with sandpaper, then spray a matching car paint, and finally polish.
Temporary solution: Cover the damaged area with waterproof tape or film to prevent water from entering, but it must be dealt with thoroughly as soon as possible.
Youdaoplaceholder0 Severe damage (extensive cracking, missing or snap breakage) :
If the internal structure (such as the motor or circuits) is damaged and the rearview mirror assembly needs to be replaced, it can be claimed through insurance or repaired at a 4S store.
Steps for DIY shell replacement (Basic tools required)
Youdaoplaceholder0 Disassemble the mirror surface : Press the upper part of the mirror surface with your palm to lift the lower part. Gently pry the edge with a crowbar to remove the lens. Be careful to disconnect the heating function wire ends (if any).
Youdaoplaceholder0 Remove the old housing : pry open the fixing clips to avoid damaging the installation position; If the snap breaks, hot melt adhesive can be used to assist in fixing the new housing.
Youdaoplaceholder0 Install the new housing : press and fix it in place to ensure there are no gaps; Test whether the adjustment function is normal.
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