How to Solve the Issue of Metal Key Cases Affecting Signal?

[SarahMarie]

If the car comes with a remote-controlled key, it is not advisable to use a metal case for it. Metal cases can block radio waves, which may interfere with the normal operation of the remote control. You can try replacing the battery to resolve the issue.

[VanBeckett]

I'm also a car enthusiast. A while ago, after putting a metal case on my key, the remote functions often failed—like needing to press several times to lock the car or start it, which was really annoying. This mainly happens because metal can block wireless signals, such as RFID or Bluetooth, preventing them from transmitting properly. I learned a simple trick online: just ditch the metal case and switch to a plastic or silicone one, which costs only about ten yuan on Taobao. After switching, the problem was immediately resolved. Alternatively, if you don’t want to change the case, you can take the key out before operating it or try holding it at a different angle—sometimes raising it higher to avoid the case helps. For daily storage, avoid placing the key near your phone to prevent interference from other devices, making maintenance easier. If you’re in a hurry occasionally, you can also visit an auto repair shop for a signal test to rule out any wiring issues.