Where to install ETC on the windshield?
3 Answers
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, it is installed 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 and 90 degrees. For vehicles with factory-installed or aftermarket explosion-proof film, which may affect microwave signal transmission, the device should be installed in the microwave sunroof strip area. ETC stands for Electronic Toll Collection. To apply for an ETC device, you need to provide the original and photocopies of the vehicle owner's valid ID and vehicle registration certificate. If the application is handled by a proxy, the proxy's valid ID is also required. The photocopy of the vehicle registration certificate should include the page with the most recent annual inspection stamp. Additionally, a bank card under the owner's name (aged 18 to 60) is required for deducting highway tolls. Here are some important considerations for ETC installation: 1. Avoid obstructing the driver's view. The best position is behind the rearview mirror. Many car models have windshields with a steep incline, which can reduce the driver's field of vision. Installing the ETC device behind the rearview mirror on the right side can help avoid blocking the view. 2. Ensure proper charging. The ETC device requires power but generally does not need manual charging or battery replacement, as it has a built-in solar panel. Therefore, avoid installing it on the blackened areas of the windshield or any position that might block the solar panel. 3. Do not remove the device once installed. The adhesive pad has an anti-tamper switch connected to a button. When installed, the windshield presses this button in. If the device is removed, the button pops out, triggering the switch and locking the device, which then requires unlocking at an ETC service center. This feature prevents multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To avoid paying for the vehicle in front due to its faulty ETC device, maintain a distance of at least 10 meters. The ETC lane recognizes vehicles at a speed of 20 km/h; driving too fast may result in failed toll deduction. Also, insufficient balance on a debit card linked to ETC can cause payment failure.
As a car owner, I specifically consulted the installation technician when installing the ETC. The optimal position is the central area at the top of the windshield, approximately 5 centimeters behind the rearview mirror. Why choose this spot? First, it doesn’t obstruct the view at all—you can’t see the device while driving. Second, the solar panel gets ample sunlight to avoid running out of power. Third, this height allows the highway toll station’s sensing antenna to quickly detect the signal. Before installation, thoroughly clean the glass to ensure no dust remains. After peeling off the adhesive on the back of the device, press firmly for 30 seconds to secure it properly. Remember, never install it on the black ceramic area—not only is the signal poor, but it’s also prone to falling off. If installing it yourself, use the phone’s front camera to check the position and ensure the license plate is visible. After installation, monitor for any looseness for three consecutive days. If the alarm sounds, you’ll need to reactivate it, which can be quite troublesome.
After repairing cars for over a decade, I've found that ETC positioning requires careful consideration. The best spot is right at the center top edge of the windshield, appearing just behind the rearview mirror from inside the car. This location is chosen for three main reasons: it doesn't obstruct the driver's view, avoids interference with wiper blades, and ensures stable charging for the built-in solar panel. Before installation, clean the glass thoroughly to prevent dust from weakening adhesive strength. Press firmly in position without moving back and forth. Be sure to avoid the black grid or metal heating wires at the windshield edges, as they may interfere with signal transmission. Some car owners prefer the right side, but this isn't recommended as it may create poor angles at toll booths. Once installed, never remove it yourself - triggering the anti-tamper device means a trip to the bank for reactivation, which is quite inconvenient.
