What are the hazards of metal car key covers?
2 Answers
Metal car key covers can significantly interfere with the signal transmission of car remote keys, potentially causing delayed response from the vehicle after key operation. Below is an explanation of how car remote keys work and methods to unlock a car when the key is lost: How car remote keys work: Car keys contain a radio remote signal generator, which emits weak radio waves when pressed. These signals are received by the car's antenna, identified by the electronic control unit (ECU), and then executed by the system's actuator. Methods to unlock a car when the key is lost: If the primary key is lost, the spare key can be used; 4S stores typically offer after-sales rescue services—simply call and wait for the rescue team to arrive and help match a new key; alternatively, seek assistance from a qualified and licensed locksmith company to unlock the car.
The most frustrating thing about metal key covers is the signal interference. I usually use keyless entry, but ever since putting on the metal cover, I often have to take the key out and press the unlock button. The mechanic said the metal blocks the wireless signal, like a Faraday cage. Plus, it's heavy and weighs down my pants pocket, even tearing a small hole in my thin pants once. The most annoying part was when my car battery died and I needed to remove the mechanical key—the cover was stuck so tight I had to pry it off with my nails for ages. I was so tempted to just smash it at that moment.
