What to Do When ETC Keeps Falling Off?

[JoshuaAnn]

Reattach it using 3M adhesive tape, and make sure to clean and wipe the windshield area where it will be attached beforehand. Here is some relevant information about ETC: 1. Introduction One: ETC, also known as Automatic Road Toll Collection System or Electronic Toll Collection System, is a specialized road tolling method primarily used on highways, toll bridges or tunnels, and certain urban road sections to alleviate traffic congestion. 2. Introduction Two: The ETC system operates through wireless communication and data exchange between the onboard unit installed in the vehicle and the antenna mounted on the toll station lane. It mainly consists of an automatic vehicle identification system, a central management system, and other auxiliary facilities.

[McEmilia]

My ETC used to fall off all the time, and it took me several attempts to figure out why. At first, I thought it was the adhesive, but even after changing to new tape, it still wouldn't stick properly. Later, I realized that the spot on the windshield wasn't clean enough. Recently, I bought a glass degreaser, sprayed it on first, then scrubbed with alcohol wipes, and finally wiped it dry with a cloth until there wasn't a speck of dust left. Remember to avoid the areas with black dots—those are the metal layers, and adhesive won't stick to them. After cleaning, wait five minutes until it's completely dry before applying the ETC, and press firmly for at least thirty seconds. Don't wash your car or drive at high speeds where strong winds might hit it for two days after installation. Also, the car gets too hot in summer, which can cause it to fall off. If your parking spot is in direct sunlight, it's best to use a sunshade to block it. If all else fails, you can buy a dedicated bracket to clip onto the sun visor—this method is quite reliable, and you won't have to worry about it falling off all the time.

[SanZachary]

My wife's old car ETC falls off three times a week, making her stomp her feet in frustration. I think the key lies in the placement and adhesive quality. First, choose a flat and smooth spot—avoid areas too close to the black dotted zone near the roof, as uneven surfaces won’t work. Cleaning must be thorough; the glass might have old adhesive residue or oil film. We used medicated oil to wipe the glass, which worked wonders for degreasing. When applying, don’t skimp on effort—press firmly for half a minute. For new adhesive, opt for 3M heavy-duty double-sided tape (search for ETC-specific adhesive online). After application, avoid moving the car for two days to let the adhesive bond fully. If the old car’s glass is uneven, consider a suction-cup mount for hassle-free use. Visiting an ETC service center for a free reapplication is another option—they use industrial-grade adhesive with stronger viscosity. If it keeps falling off long-term, the device itself might be warped, causing an uneven contact surface.

[SanCody]

Last year, I helped my dad solve the issue of an unstable ETC mount. It was quite simple: use anhydrous alcohol to thoroughly clean the glass until it's shiny, let it dry completely, then stick it on a flat area above the dashboard, avoiding the black dots. Replace the adhesive with small squares of 3M double-sided tape, press firmly for one minute. The key is not to move the car for a week to let the adhesive set completely. High summer temperatures can soften the adhesive, so try to park in the shade. Alternatively, you can buy a mount to fix it on the sun visor, but make sure it doesn't obstruct your view. If it keeps falling off, it's best to visit a bank branch for assistance—saves time and effort.

[McMiguel]

As someone who goes on road trips all year round, my ETC has never fallen off. The key lies in the preparation before sticking: the glass must be free of oil and dust, washed with dish soap water and then wiped dry with alcohol. Choose the flattest spot behind the rearview mirror, avoiding curved surfaces. When attaching the device, press firmly with your knee for more than 30 seconds, as it's hard to control the pressure yourself. If the adhesive ages, replace it with automotive-grade double-sided tape. After sticking, avoid moving the car for three days for extra security. Before parking in the scorching summer sun, spray some heat shield film spray to lower the internal temperature. If you're really unsure, spend some money to have professionals at a service point do it—their adhesive can withstand 120-degree heat. Also, avoid spraying water directly at the edges of the ETC when washing the car.

[SanJasmine]

A friend just bought a new car and asked me about his ETC falling off twice in a week. I suggested he first check the quality of the original adhesive—new device adhesives might have quality issues, so he should contact ETC customer service directly for a replacement. Second, he should prepare the windshield: wipe it thoroughly three times with medical alcohol and paper towels until no dirt remains, then let it dry for five minutes. When installing, choose the middle area at the bottom of the windshield, which is much flatter than the upper part. After applying the new adhesive, press firmly for at least 40 seconds and avoid driving for 72 hours to prevent loosening. Lastly, I reminded him to avoid parking in direct sunlight, as exposure increases the chance of the adhesive failing by 70%. If it fails multiple times, he might as well buy a magnetic holder for about 30 yuan on Taobao—it can be fixed to the sun visor and removed anytime for charging.