Should I replace the lock or duplicate the key if my car key is lost?

[TheoRose]

Both replacing the lock and duplicating the key are viable solutions when a car key is lost. 1. Duplicating the key: Depending on the car model, the service station will require the owner to provide the 17-digit anti-theft code for key configuration (this code is not the key cut number, usually provided to the owner at the time of new car purchase and should be kept safely). After obtaining the code, the service station will proceed in two ways: first, they will configure a metal key for the owner (this requires the owner to provide the key cut number; if the cut number is unavailable, the owner must present valid identification for both the vehicle and themselves to retrieve the cut number from the database). Second, they will modify the onboard computer parameters to invalidate the lost key (though the key can still unlock the door, it will no longer start the vehicle). 2. Replacing the car lock: This is a more secure option but comes at a higher cost. The price varies significantly depending on the car model, and the number of locks that need replacement also differs. Some models use a single key for the door, trunk, glove compartment, and fuel cap. In such cases, replacing all locks would require changing multiple locks.

[RafaelDella]

I've noticed many people discussing the choice between replacing locks or duplicating keys, and in fact, duplicating keys is often more cost-effective. Getting a new key made isn't expensive, especially for standard keys, which can be done at an auto repair shop or a 4S dealership, sometimes completed in as little as an hour. Unless the car uses a high-end key with an anti-theft chip, which might require professional programming, the cost is still significantly cheaper than replacing the locks. Replacing the entire lock system involves changing the car lock, door locks, and engine lock, driving up costs and requiring waiting for parts. Lock replacement should only be considered if the key has been found by someone else, posing a high risk of theft, such as when parked in a public parking lot. Most of the time, I recommend duplicating a new key—it saves both money and time.

[SanAmara]

From a safety perspective, if the key is lost, I need to first assess the level of risk. For example, if the car is parked on the roadside or the key has the house number on it, changing the locks would be more reassuring to prevent someone from tampering with the lock system after finding it. Getting a duplicate key is simpler, but for older cars it's manageable, whereas for newer cars with smart keys, programming at the dealership is necessary to avoid complications. Although replacing the entire lock set costs more, it provides a permanent solution. I should also check if there's a spare key. If it can't be recovered, then it's best to decisively replace the locks.

[ClaytonDella]

I think getting a duplicate key is the most convenient and cost-effective option. Like the last time I lost my key, I just spent 200 yuan to get a new one made. Replacing the entire lock set costs over a thousand yuan, which isn't necessary unless the car is particularly high-end with advanced anti-theft requirements—then it might be worth it. Most shops can handle key duplication quickly, and they can even add remote start functionality. As for security, don't panic—try getting a duplicate key first.