Can I Install ETC Before Applying Window Film?
3 Answers
You can install ETC before applying window film. Here are specific details about ETC: 1. Name Meaning: ETC (Electronic Toll Collection), translated in Chinese as electronic non-stop toll collection, is an automatic toll system for highways or bridges. 2. Function Introduction: It uses dedicated short-range communication between the vehicle-mounted electronic tag installed on the windshield and the microwave antenna in the ETC lane at toll stations. By leveraging computer networking technology for backend settlement processing with banks, it enables vehicles to pass through highway or bridge toll stations without stopping to pay fees.
Installing ETC before applying window film is indeed possible, but as a DIY car owner, I find reversing the order more convenient. From my experience, ETC devices are usually mounted on the upper inner side of the windshield, which is also covered by window films like heat insulation films. If you install ETC first and then apply the film, the technician may need to temporarily remove the device during application to ensure proper adhesion and avoid bubbles. Afterwards, you'll have to recalibrate the ETC position because its signal-based toll collection might be disrupted by the metal layers in the film, potentially causing malfunction. I tried this once, and my ETC kept failing to scan properly, requiring multiple adjustments to fix. I recommend installing ETC after completing the window film application for a one-time setup, avoiding repeated adjustments. In regular maintenance, planning steps in advance can prevent many hassles. In short, it's doable but less convenient—always consider long-term usage.
I've seen this situation quite often while helping out at the car dealership. It is possible to install the ETC first and then apply the film, but there's some risk from a signal perspective. ETC devices operate via radio waves, and if the window film contains a metal-based layer, it might block certain frequencies, leading to delayed or unresponsive signals. The film installer must carefully work around the ETC device during application. If the film accidentally covers the edges of the device, it has to be peeled off and reapplied, wasting material. I would recommend users apply the film first to ensure the glass surface is smooth and even, then attach the ETC more securely. Such details are crucial in vehicle modifications—for example, choosing the right type of explosion-proof or heat-insulating film can even extend the lifespan. Keeping the sequence simple saves time and money.
