Why Can't the Spare Key Open the Car Door?
2 Answers
Spare key cannot open the car door may be due to the spare key running out of battery. Related introduction: 1. Solution: You can install a Keyless Start System, which allows starting the vehicle without taking out or turning the key. Simply place the key in your bag or pocket, press the button inside the car or turn the guide plate to ignite the engine. This is more convenient and significantly enhances the sense of luxury and technology. 2. Extension: The system uses the most advanced Radio Frequency Identification (RFID) technology, automatically locking and unlocking the doors through the chip in the smart card carried by the owner. This means when the driver approaches the vehicle within a certain distance, the door locks will automatically open and disable the anti-theft system; when the driver leaves the vehicle, the door locks will automatically lock and activate the anti-theft system.
As a veteran driver with years of experience, I've encountered situations where the spare key couldn't open the door multiple times. The most common issue is the spare key deforming or bending after being left unused in a drawer for too long, or the teeth wearing down and becoming unable to insert into the lock. Another possibility is the door lock accumulating dirt and dust, causing it to jam, especially in humid areas where rust is severe. Another reason could be the poor quality of the spare key—not the original factory one—where the copied teeth aren't precise enough to engage the lock cylinder. When dealing with this, I usually start by cleaning the key and lock, spraying some lubricant to try. If that doesn't work, I use a hairdryer to thaw it (common in winter when it freezes). Prevention tips: Regularly rotate the use of spare keys to prevent aging and deformation; avoid placing heavy objects on them when storing; lubricate the door lock every quarter; and ensure precision by having backups made at professional shops. Fix small issues promptly to avoid bigger troubles.
