Why Can't the Spare Key Unlock the Car Door?
2 Answers
Spare key cannot unlock the car door because the car battery is dead or the key has no power. Here are some relevant introductions about spare keys: 1. Concept: Ordinary keys need to be inserted into the keyhole on the car door to unlock it. It is mechanical and serves as a regular unlocking key. 2. Precautions: Do not hang it together with other keys or accessories, as swinging back and forth while driving can gradually widen the keyhole gap, making it prone to issues when starting the vehicle. After ignition, immediately release the key and do not keep turning it, otherwise it may damage the engine belt. Avoid throwing or dropping it carelessly to prevent loss.
I often encounter friends asking why the spare key can't unlock the car door, with the most common reasons being key wear or imprecise duplication. Sometimes, after years of use, the original key's teeth get worn down, causing the spare key to jam when turned. It could also be due to rust or dust clogging the lock cylinder, especially during humid seasons. It's advisable to first check if the key's teeth are intact and undamaged, then try wiping it clean with a soft cloth and spraying some lubricant into the keyhole while gently twisting. If it still doesn't work, avoid forcing it to prevent further damage to components—it's best to visit a repair shop for professional diagnosis. Regular maintenance, including periodic cleaning of the locking system, can help prevent such issues.
