What is the best position to install ETC in a car?

[VonEvan]

For small cars, the ETC is generally installed in the upper middle part of the front windshield, while for large vehicles such as trucks and buses, the installation position is in the lower middle part. The suitable installation position should be no lower than 1.2 meters and no higher than 2.5 meters, with an installation angle between 30 to 90 degrees. For vehicles with anti-explosion film or those that have been retrofitted with anti-explosion film, it may affect the signal transmission of the microwave communication link, so it should be installed in the microwave skylight zone. ETC stands for Electronic-Toll-Collection, meaning electronic toll collection system. To apply for ETC, you need to provide the original and photocopy of the vehicle owner's valid ID card and vehicle license. If the application is not made by the owner, the agent's valid ID card is also required. The photocopy of the vehicle license should include the page with the most recent annual inspection seal. Additionally, a bank card for deducting highway tolls is required, and the vehicle must be registered under the name of an individual aged between 18 and 60. Here are some precautions for installing ETC: Do not obstruct the view; it is best to install it behind the rearview mirror: Many car models have a large inclination angle of the windshield, which can reduce the driver's field of vision. If this is not considered during ETC installation, it can increase the driver's blind spot. Installing it behind the rearview mirror on the right side can avoid obstructing the view. Do not affect charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back that can charge itself. Therefore, during installation, avoid the black areas on the windshield and positions that may block the solar panel. Once installed, do not remove it arbitrarily: The button in the middle of the adhesive is an anti-removal lever, connected to a switch below. After the electronic tag is installed, the windshield will press the anti-removal lever in. If the tag is removed arbitrarily, the lever will pop out and trigger the switch, locking the electronic tag and rendering it unusable. You will then need to go to an ETC service point to unlock it. This is designed to prevent multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To prevent the ETC device of the vehicle in front from malfunctioning, maintain a distance of more than 10 meters from the vehicle in front to avoid automatic sensing and paying for the vehicle ahead. The ETC lane recognition speed is 20 kilometers per hour; driving too fast may result in failure to read the vehicle device information and cause payment failure. When using a debit card linked to ETC, insufficient balance may also lead to payment failure.

[StAva]

Actually, installing the ETC device behind the interior rearview mirror is the most hassle-free solution, which is exactly what I did with my own car. This position neither blocks the driver's view nor prevents the solar panel from getting sunlight for automatic charging, and it provides excellent sensitivity when passing through toll stations. Remember to clean the glass with an alcohol pad before attaching it for better adhesion. Never install it in the dotted black area or behind metallic film, as the signal will be blocked. The new devices now come with Bluetooth, making activation via smartphone extremely convenient—it can be done in just five minutes.

[LeTanner]

Just helped a friend install an ETC, and found that choosing the wrong position is particularly troublesome. The ideal spot is slightly to the right of the center of the windshield, avoiding the wiper blind spot is crucial, otherwise, recognition failure on rainy days is too frustrating. Before installation, it's recommended to do an ignition test to avoid the signal sensing area on the front windshield. Once saw someone stick it on the dashboard, and during an emergency brake, the ETC flew off and cracked the windshield—total loss. Owners with metal film should note: either cut out a piece of the film or use an external mount, otherwise, pulling the card out daily is just inhumane.

[Daniel]

Choosing the ETC mounting location follows three key principles: no obstructed view, no accidental button presses, and accessible charging. I prefer installing it on the right side of the rearview mirror, leaving the left side for the dashcam. Before sticking, peel off the adhesive backing plastic and press firmly for thirty seconds – it won't fall off even in summer heat. Last week, I encountered a case where the driver mounted it too close to the A-pillar, requiring repeated backing up at toll gates. Maintain at least 5cm clearance from the roof; behind the rearview mirror is the safest spot. After installation, test by inserting/removing the card – a beep confirms successful activation.

[EmmaDella]

As someone who frequently drives on highways, installing the ETC in the wrong position can be a nightmare. The best location is the area on the windshield directly behind the rearview mirror, as it won't obstruct your view. Be aware that some cars have special coatings on the front windshield, such as Mercedes' heat-insulating zone located slightly above the center, where installing the ETC will cause it to malfunction immediately. Don't wash your car on the same day after installation—I learned the hard way when the adhesive wasn't dry and got washed off. Also, don't be lazy and stick it directly on the black ceramic dots; high temperatures can melt the glue, causing the device to fall and damage your dashboard, leaving you with costly repairs.

[ArcherDella]

Last time when installing the ETC, I specifically consulted the toll booth staff, and they said that poor positioning could reduce the recognition rate by 30%. After personal testing, placing it 5 cm behind the rearview mirror is the most reliable, and make sure the solar panel faces outward—don’t install it upside down. The newly purchased anti-slip silicone pad is very practical; it clips directly onto the sun visor, making it easier to remove and clean the windshield. Some car owners installed it in the corner of the windshield, leading to insufficient charging, and the battery died within six months. A key reminder for owners who have modified their windshield: high-metal-content heat-insulating films can cause the ETC to malfunction. You can apply for a mini version of the device and install it next to the headlight.