Can a Locksmith Replace Lost Car Keys?

Replacing lost car keys is a task that can be handled by a skilled locksmith, but the process can vary significantly based on the type of vehicle and the security systems in place. If you have an older car without immobilizing devices or smart keys, the process can be relatively straightforward. However, for modern cars with smart key systems, it becomes much more complex.

Older Cars without Immobilizing Devices

For older cars that do not use immobilizing devices or smart keys, the process of replacing lost keys is generally simpler. A locksmith can obtain the key code from the Vehicle Identification Number (VIN) and can often read wafers to cut a key. In some cases, extremely old cars, particularly certain Fords, may use pin tumbler locks that can be replicated through a technique called 'impressioning.' This process involves using a prepared blank key, inserting it, and twisting it to align the pins. Tiny depressions left on the edge of the blank can be filed to match the desired key dimensions, and this process is repeated until the key turns the lock smoothly.

As an example, original keys for these vehicles can sometimes be disassembled and read by the locksmith, allowing for accurate replication of the key.

Modern Cars with Smart Key Systems

Modern cars have largely transitioned to smart key systems, which require a remote fob to start the engine. Even non-smart version keys can typically open the doors and trunk. A popular example is my 2004 hybrid Prius, which uses a remote fob to unlock the doors and start the car. The process of creating a functional smart key for modern cars can be quite complex.

Remote Fobs: Most modern key systems involve remote fobs that allow the car to be started, locked, and unlocked wirelessly. These fobs can often be programmed by a locksmith using the VIN number. In some cases, a new fob can be programmed through a process called the 'chicken dance,' which involves inserting and withdrawing the fobs from the slot in the dash and opening and closing the door multiple times. However, this process requires an existing working key.

Manual Keys: A manual key can also be programmed to start the car, but it will not have the full functionality of a smart key. Creating a functional smart key usually requires an existing functional fob. Once four fully functional remote fobs have been made, no more can be programmed without resetting or replacing the immobilizer system, which can be quite expensive.

Not So Smart Keys: Some modern car keys have a small resistor or other device in the bow and are simpler to replicate. These keys can be duplicated more easily, but the process can still be complex and may require the manufacturer's tools and equipment.

Creating new keys for modern cars can indeed be a bit of a challenge, but it is still possible with the right expertise and resources.

Conclusion

While it is possible to replace lost car keys with the help of a skilled locksmith, the process can vary significantly based on the age and type of the vehicle. Whether it is a simple key replacement for an older car or a complex process for a modern smart key system, a reputable locksmith is the key to getting you back on the road.