What to Do When the Car Remote Lock Fails?

[VonMatthew]

Due to sealing issues, the key may become damp or get oxidized by dirt inside. Clean it thoroughly and reinstall to test if it functions properly. Poor contact on the circuit board requires soldering, such as with a soldering iron. It is recommended to take it to a precision electronics repair shop or a mobile phone repair center for professional handling.

[MacLila]

Last month, my car key suddenly stopped working, which really stressed me out. First, I tried the spare key to check if the main one was broken, and sure enough, the spare worked. According to forum advice, it’s usually just a dead battery in the key fob, so I rushed to the convenience store to buy a new button battery, replaced it, and fixed the issue. If the battery isn’t the problem, you should check the fuse labeled 'door lock' in the fuse box—use tweezers to pull it out and see if it’s blown. I’ve also tried using the mechanical key to lock the doors; just pry open the small cover on the driver’s side door handle to insert the key. If all else fails, don’t struggle too much—auto repair shops have specialized equipment to diagnose signal issues, and spending around a hundred bucks is better than wasting time on guesswork.