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Must ETC be installed on the windshield?

1 Answers

MaggieLynn

07/30/25 5:36am

ETC can be used without being attached to the windshield. Installing ETC on the upper part of the windshield is to minimize obstruction of the driver's view while ensuring better recognition by the toll station equipment. If you prefer not to install it on the windshield, place it in an open area where it can be seen through the windshield. For small vehicles, the ETC installation position is generally in the upper middle part of the front windshield, while for large vehicles like trucks and buses, it is installed in the lower middle part. The suitable installation height is between 1.2 meters and 2.5 meters, with an angle between 30 to 90 degrees. If the vehicle has or will have a sunshade film, which may affect microwave signal transmission, it should be installed in the microwave window area. Here are some ETC installation precautions: Do not obstruct the view; installing it behind the rearview mirror is ideal: Many car models have windshields with a steep angle, which can reduce the driver's field of vision. Installing ETC without considering this may increase 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 requires power but generally does not need charging or battery replacement, as it has a built-in solar panel for self-charging. Therefore, avoid installing it on the windshield's shaded areas or where the solar panel may be blocked. Once installed, do not remove it arbitrarily: The adhesive button in the middle is an anti-tamper lever connected to a switch. After installation, the windshield presses the lever in. If removed, the lever will pop out, triggering the switch and locking the tag, requiring an ETC service point to unlock it. This prevents multiple vehicles from sharing one device. ETC usage notes: The ETC transaction sensing range is 8 meters. To avoid issues caused by the vehicle ahead, maintain a distance of over 10 meters to prevent automatic payment for the wrong vehicle. The ETC lane recognition speed is 20 km/h; exceeding this speed may result in failed transactions. If using a debit card linked to ETC, insufficient balance may also cause payment failure.

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