Where is the best place to install an ETC device?

[LaDelaney]

For small cars, the ETC device 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 appropriate installation position should be no less than 1.2 meters and no higher than 2.5 meters in height, with an installation angle between 30 and 90 degrees. For vehicles with anti-explosion film or those that have it installed later, which may affect the signal transmission of the microwave communication link, the device should be installed in the microwave skylight strip. ETC stands for Electronic-Toll-Collection, meaning electronic toll collection system. To apply for ETC, the vehicle owner needs to provide original and photocopies of their valid ID card and vehicle registration certificate. If the application is not made by the owner themselves, the agent must also bring their valid ID card. The photocopy of the vehicle registration certificate 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 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 windshields with a large rearward tilt angle, which can reduce the driver's field of vision. If this is not considered during ETC installation, it may increase the driver's blind spots. Installing it behind the rearview mirror on the right side can help avoid obstructing the view. Do not interfere with 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. 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. In such cases, you will need to visit an ETC service point to unlock it. This mechanism 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 ahead to avoid automatic toll payment for the front vehicle. The ETC lane recognition speed is 20 kilometers per hour; driving too fast may result in failure to read the vehicle's device information and thus failed toll deduction. When using a debit card linked to ETC, insufficient balance may also cause toll deduction failure.

[StReese]

I often see car owners asking about the best place to install the ETC device. Actually, the top center of the windshield is the most ideal location—close to the rearview mirror but not too close. That area has strong signal reception because the windshield has more light-transmitting areas and less metal interference, reducing the chance of signal blockage by sunshade films or heat-insulating coatings inside the car. If installed on the dashboard or near the door frame, the higher metal content can interfere with microwave transmission, potentially causing scanning failures at toll stations and wasting time in queues. For proper installation, use double-sided tape or specialized adhesive, clean the glass thoroughly before sticking it firmly to prevent detachment due to high-speed vibrations. This position also doesn’t obstruct the driver’s view, ensuring safety and convenience. Checking the battery life is also easier during daily driving, and regular maintenance can extend the device’s lifespan. I’ve tried installing it correctly a few times, and the toll payments went smoothly, saving me a lot of hassle.

[LeKira]

Personally, I think the best position for the ETC device is on the upper right side of the windshield—not too low or too far to the side. I've been installing it this way for ten years of driving, and it never obstructs my view while ensuring instant scanning at toll stations, saving both time and effort. Some people haphazardly place it near the steering wheel or in the corner of the front window, leading to weak signals, frequent malfunctions, or even interference from dark tint films, causing billing errors. Choosing the right location enhances convenience, and securing it firmly prevents it from falling and hitting something. It’s advisable to test the windshield for obstructions before installation. Key details include ensuring the antenna faces outward for smooth communication with toll equipment, as improper placement may result in overcharging. Simple installation and regular checks can prevent many minor issues.