Can a Locksmith Forge a New Car Key If You Have the Originals?

Yes, but with some caveats. The process differs significantly based on the age and technology of your car. Let's delve into the details of what a locksmith can and can't do for you.

Older Cars

Beyond certain older models, particularly those without immobilizers or smart keys, the process is relatively straightforward. A locksmith can often obtain the key code from the Vehicle Identification Number (VIN). They can read the wafers in the key and cut an exact key. Some very old cars, especially Ford models, might use a pin tumbler lock requiring a technique known as impressioning. Here's how it works:

A blank key is inserted into the lock and rotated. With a specific force, the pins bind to the edges of the lock. The blank is then tapped to make a tiny depression in the edges of the blank. Subsequently, the blank is filed down to the first standard depth and tested. The process is repeated for each subsequent pin, filing until the blank can turn the lock freely.

Naturally, the lock can be disassembled and read too, which is a straightforward mechanical process.

Modern Cars

Modern cars heavily rely on smart keys, often requiring a remote key fob to start the engine. Any manual key will only offer door access, not engine start. For example, my 2004 Prius uses a remote fob to activate the button on the dash to start the car. To program a new fob, you need an existing working key. The process involves a series of complex actions, often referred to as the 'chicken dance,' where the fobs are repeatedly inserted and removed, and doors are opened and closed. However, this doesn't always work seamlessly. The dealership or an automotive locksmith can use the VIN to program a new fob and also cut a manual key. But bear in mind, this manual key won't start the car.

Once four fully functional remote fobs have been made, no more remote fobs can be programmed without resetting or replacing the immobilizer, a costly and time-consuming process.

Not So Smart Hard Keys

Some less sophisticated keys, often lacking advanced electronics, can be replicated with minimal components like a resistor. These are simpler to work with and create.

The Quandary of Modern Key Replacement

Getting new keys for modern cars can be cumbersome. However, it does help reduce car theft, making it a feature rather than a nuisance. Dealerships often generate substantial revenue from customers who lose their keys and have no copies. As a tip, always keep spare keys in secure places so you never have to go to a dealership or locksmith for a replacement.

After spending hundreds of dollars on a new key, many people hesitate to pay a little extra to have several made. This is a wise precaution. Same with house keys and other vital keys. Make copies before you need them, while you still have a working key to copy.

If you ever find yourself in a situation where you're the only key holder or had all keys on the same keyring, remember, you're responsible for whatever the locksmith charges. Don't be a dolt. Make copies of your keys in advance, while you still have working keys to copy them from.

Ultimately, keeping backups of your keys can save you from costly and inconvenient situations. Plan ahead and stay proactive!