What is the mounting hole for the car rearview mirror?
The "installation hole" on the rearview mirror usually refers to a small plug hole reserved on the outer rearview mirror housing, mainly used for installing the blind spot mirror (small round mirror). Some models also use it for wiring or fixing other accessories.
Regarding this hole, there are many online explanations. Here is a summary of its common uses and precautions:
What is this hole for?
Blind spot mirror installation position: This is the main purpose. Simply insert the blind spot mirror (small round mirror) into this hole to securely fix it. It is more stable than using glue and can avoid damaging the original mirror lens.
Hidden wiring port: Some models use this hole to provide wiring or power for devices such as dash cameras, making the interior cleaner.
Drainage hole: In some models, this hole also has a drainage function. It needs to be regularly cleared to prevent water accumulation.
Points to note:
Not all cars are the same: The structure of rearview mirrors varies among different brands and models. The position and actual function of this hole may differ, and it cannot be generalized.
Don't blindly drill holes: If there is no reserved hole on the vehicle and you want to install a camera or small round mirror, you must first disassemble the rearview mirror to confirm the internal structure and avoid the motor and heating wires. Otherwise, it is easy to damage the components.
In simple terms, this "hole" is the "extension interface" reserved by the manufacturer. The most common one is to allow you to install the small round mirror without damaging it, expand your field of vision, reduce blind spots, and improve safety when changing lanes and parking.
The holes (also called plugs) on the rearview mirror are mainly the "installation positions and functional interfaces" reserved by the manufacturer. Different models have different uses, and there are three common types.
Main function
Installation of blind spot mirror: This is the most common application. The plug-in blind spot mirror can be simply inserted directly into the hole, which is more stable than the glue-attached type and can also be adjusted to eliminate the blind spots during lane changing or reversing.
Hidden power socket: Many mid-to-high-end models have reserved USB or dedicated interfaces in the base of the rearview mirror, which can be used to connect a car camera or navigation device. By using a voltage reduction cable, the power cord can be hidden inside the vehicle, making it neater.
Drainage hole: It is responsible for draining water that seeps into the rearview mirror after rain or after washing, preventing water accumulation from corroding the regulating motor and circuit board.
Different brands and configurations of vehicles may have different functions for this small hole. Some cars may only have a drainage hole, while others integrate multiple functions.
How to determine which type your car is
Location: The small hole on the edge or base of the outer rearview mirror is likely for installing the blind spot mirror; the interface inside the plastic shell at the connection point between the rearview mirror and the front windshield is usually for power access.
Look at the manual: The most reliable method is to flip through the vehicle's user manual, which will clearly state the specific purpose of this hole.
Try it: If it is a drainage hole, use an injection needle to suck in some water and see if the water can flow out smoothly.
Practical suggestions
Install blind spot mirror: It costs only 20-30 yuan, and the plug-in type is more stable than the adhesive type. New drivers will find it much easier to reverse or change lanes.
Connect a car camera: If it is confirmed that it is a reserved power socket, you can buy a matching voltage reduction cable and install it yourself, without having to dismantle the center console or run a visible wire. This saves a lot of installation costs.
Clean the drainage hole: Use a fine iron wire to clear it, then use an injection needle to rinse with clean water. It can be done in a few minutes to avoid water accumulation damaging the internal components of the rearview mirror.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
