
The ETC installation location for the Tang DM is generally in the upper middle part of the front windshield. 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, it may affect the signal transmission of the microwave communication link, so it should be installed in the microwave sunroof strip. ETC is the abbreviation for Electronic-Toll-Collection, meaning electronic toll collection system. To apply for ETC, you need to provide the original and photocopies of the vehicle owner's valid ID card and vehicle registration certificate. If the application is not made by the owner, the agent's valid ID card 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 for deducting highway tolls is required, and the vehicle must be registered under the name of an individual aged between 18 and 60. Here are the precautions for installing ETC: Do not obstruct the view; it is best to install it behind the rearview mirror: Many car models have a large rearward tilt angle of the windshield, which reduces the driver's field of vision. If ETC is installed without considering this, it may increase the driver's blind spot. Installing it behind the rearview mirror on the right side can avoid obstructing the view. Do not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back that can charge itself. Therefore, during installation, avoid the black areas on the windshield and positions that may block the solar panel. Do not remove it randomly once installed: The button in the middle of the adhesive is an anti-removal lever connected to a switch. After the electronic tag is installed, the windshield will press the anti-removal lever in. If the tag is removed randomly, the lever will pop out and trigger the switch, locking the electronic tag and rendering it unusable. In this case, you will need to visit an ETC service point to unlock it. This mechanism is designed to prevent multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To prevent the ETC device of the vehicle in front from malfunctioning, maintain a distance of more than 10 meters from the vehicle in front to avoid automatic toll payment for the preceding vehicle. The ETC lane recognition speed is 20 kilometers per hour. If the vehicle speed is too fast, the system may fail to read the vehicle's device information, resulting in a failed toll deduction. When using a debit card linked to ETC, insufficient balance may also cause a failed toll deduction.

I've been driving the BYD Tang DM for several years. Last year, when I installed the ETC, I placed it right in the center of the windshield, just a little to the right of the rearview mirror. That area doesn't obstruct the view and has the best signal reception. Before installation, I carefully wiped the glass surface with alcohol to ensure no oil residue remained before firmly attaching it. Choosing a position too low might affect sunlight exposure, while too high could interfere with the rearview mirror's field of view. After installation, I tested it a few times at toll stations, and the passing speed improved significantly, saving me from queuing time. Daily use has been very hassle-free. I recommend everyone check if the installation direction is correct, with the antenna facing outward to avoid attaching it to metal reflective films, as that could weaken the signal and severely affect usage. It's practical to clean off dust during car maintenance, and avoid piling up clutter nearby, as it can accumulate static electricity easily.

I've installed ETC devices several times myself, and the most recommended position for the BYD Tang DM is near the center of the windshield, close to the rearview mirror, as it ensures uniform signal coverage without weakening. The installation process is simple: first, choose a clean, unobstructed spot, then press the included adhesive pad firmly to secure it. If the position isn’t accurate, it might loosen or interfere with other systems. I once tried placing it near the edge, but the signal was intermittent. Later, I found that the central area provides the most stable and quickest performance, saving the hassle of frequent adjustments. This design cleverly utilizes the windshield’s light-transmitting properties, ensuring smooth passage through ETC gantries while enjoying discounts—saving both time and money. Just remember to clean it regularly to prevent detachment.

I chose to install the ETC right in the center of the windshield, avoiding the shaded areas. A position too high blocks the view, while too low weakens the signal—the central spot offers the best balance, safety, and reliability. After installation, driving through highway toll stations becomes smoother and saves time.

After purchasing my new BYD Tang DM, I went to the 4S store to have the ETC installed. The technician helped me stick it in the middle of the windshield near the rearview mirror, at a moderate height that doesn’t obstruct my driving view, and the signal is still strong. The entire installation took only five minutes—cleaning and applying the adhesive were done in one go, making it quite hassle-free. If the position is off, it might need readjustment to prevent loosening or falling off. After installation, highway travel has become much faster with automatic toll deduction, which is convenient and worry-free while also saving money. I recommend new car owners to pay attention to the placement, choosing an unobstructed area and keeping it clean to avoid signal loss. Just check its stability periodically.

I usually install the ETC device under the center rearview mirror of my BYD Tang DM on the windshield, as this spot is the most practical. It doesn't obstruct the driver's view while ensuring optimal signal reception for quick and cost-effective toll passage. When installing, make sure to thoroughly clean the glass surface and firmly secure it with double-sided tape. Improper adhesion may lead to unstable signals, affecting daily usage efficiency. While driving, keep the area free of clutter and dust accumulation to maintain performance. This setup combines aesthetics and safety, offering numerous benefits including environmental friendliness and long-term fuel cost savings. Regular maintenance ensures smooth operation and avoids unnecessary hassles.