Can Car Keys Be Self-Duplicated?
3 Answers
Yes, they can. If you have a spare key, it can be used normally. Additional information: 1. Car keys are relatively more secure and advanced compared to ordinary house keys. To duplicate a remote key, the 4S shop needs to match the new key with a "code" from the original car. 2. After the car key is matched, the new key can be activated, and the lost key will become invalid immediately. 3. Duplicating car keys is relatively expensive, depending on the car model and brand. 4. Many cars are equipped with electronic key locks, which are mostly applied to ignition locks, further enhancing the functionality and anti-theft effect of the car's electronic anti-theft system. Electronic key locks can be divided into two categories: resistive electronic key locks and coded electronic key locks. The working principles of these two types of electronic key locks are exactly the same, both using a codec circuit.
I often tinker with small car parts myself and think mechanical keys can basically be duplicated on my own—just buy a cheap key copying machine for about ten bucks, but it must be the old-fashioned type without a chip. Don’t even try with electronic remote keys; they require programming to match the engine immobilizer system, which can’t be done without professional equipment. I tried it once and almost ruined the original key before I learned my lesson. Nowadays, most new cars come with smart keys that have anti-theft chips, making unauthorized duplication risky. If someone with bad intentions copies it, your car could be stolen. So, DIY is fine for simple mechanical keys, but for complex ones, it’s best to seek help from a shop. Always keep backups of your original keys to avoid emergencies and drive with peace of mind.
From my understanding, the key to duplicating car keys lies in the type: old-fashioned purely mechanical keys are simple and can be copied directly at a street stall; however, modern cars come with remote or smart keys that require decoding and programming, which can't be done casually. A friend of mine tried buying tools online, but the program didn't match, resulting in a malfunctioning key. DIY key duplication carries high risks, such as programming errors that could lock the car's computer, leading to even costlier repairs. Generally, the safest approach is to go to a 4S shop or a professional locksmith, as they have original manufacturer data and equipment to ensure safety and compatibility. Don't forget to regularly check the key's battery, as low power can also affect normal unlocking.
