Can ETC be reused after removal and reinstallation?
3 Answers
It cannot be used normally after removal and reinstallation. During installation, there is a button on the back of the device that connects to the windshield. Data is only saved when this button is pressed. When the device is removed a second time, the button pops out, triggering its reset mechanism and clearing all data, rendering it unusable. In such cases, the device must be reinstalled. ETC stands for Electronic Toll Collection, an electronic toll system. To apply, the vehicle owner must provide original and photocopies of their valid ID and vehicle registration. If someone else is handling the application, they must also bring their own valid ID. The photocopy of the vehicle registration must include the page with the most recent annual inspection stamp. A bank card for deducting highway tolls is also required. Applicants must be between 18 and 60 years old, and the vehicle must be registered under their name. Required documents for company vehicles: An introduction letter from the vehicle owner (with official seal); a photocopy of the organization code certificate or business license (with official seal); the agent's original ID; the original vehicle registration; and the vehicle for which ETC is being applied. How ETC works: The vehicle-mounted electronic tag installed on the windshield communicates with the microwave antenna in the ETC lane at toll stations. Using computer networking technology, it settles payments with the bank in the background, allowing vehicles to pass through highway or bridge toll stations without stopping to pay. Benefits of installing ETC: Saves time: Eliminates the hassle of waiting in line; Green and eco-friendly: Reduces noise and exhaust emissions by allowing vehicles to pass without stopping; Reduces wear and tear: Lowers costs by reducing the frequency of vehicle starts and stops, minimizing wear and fuel consumption. Users may also enjoy toll discounts; Improves efficiency: ETC lanes can theoretically increase traffic efficiency by 2-3 times, making traditional ETC faster and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous.
I was also curious before whether the ETC device would still work after being removed and reinstalled, so I tried it once. After taking it off, I noticed there was a small button underneath the device that popped up when loosened. After reinstalling it, the device malfunctioned at the toll booth. Later, at the service center, I learned that it was an anti-tamper design to prevent illegal relocation. The official advice is not to move it, otherwise there's a 90% chance you'll need to reactivate or replace the device, or else you'll have to pay manually at the toll station, which is troublesome. When installing, it's best to choose the upper part of the windshield, where it won't block your view and can charge stably. A reminder to everyone: removing it carries high risks. The cost-effective and hassle-free way is to have it done professionally—don't tinker around like I did to save a little trouble, as it's not worth it.
Let's talk about ETC device removal and installation from the perspective of someone who enjoys tinkering with automotive electronics. Having disassembled my own unit for research, I discovered it contains displacement sensors. Once removed and reinstalled, it's highly likely to trigger a protective lockout, rendering the card unreadable. Battery voltage may also be affected - insufficient power would make matters worse. I recommend first testing the charging status or disconnecting the car battery to reduce impact risks. If repositioning is absolutely necessary, try temporarily securing it with double-sided tape, but it's best to contact a service point to inquire about reactivation procedures. As a side note, maintaining windshield cleanliness is crucial as dirt can impair solar charging efficiency, indirectly shortening the device's lifespan.
