Car keys · Markham
Spare Car Key Duplication
The paperwork for the used car changed hands last week, and the previous owner mentioned, almost as an afterthought, that a second key never turned up.
In plain words
Making a spare before the original goes missing is simpler than making one after, because the whole process is built from a working key to read or trace from. With the vehicle and its existing key both present, the locksmith identifies the blade profile and the chip or coding the immobilizer expects, produces a matching blank, and gives it the same electronic identity as the first key. Testing both keys side by side in every door and the ignition confirms the spare performs the same way, so a future lost key becomes an errand rather than a call for entry.
How the visit goesThe blade on the everyday key has gone shiny and thin along one edge, and lately it needs a wiggle before the ignition catches. Nobody wants to be holding a failing original with nothing waiting in reserve if it finally gives out.
Spare Car Key Duplication
How the visit goes
Looking at the working key itself
The existing key is examined for exactly what it is: a plain blade, a blade carrying a transponder chip, a remote head with buttons built into the plastic, or a proximity fob meant to stay in a pocket. Wear matters too; a blade that has thinned unevenly or a button that sticks tells the locksmith what to expect when it is time to trace or copy from it, and whether the original itself might be due for retirement once the spare exists. A key that has already been altered, filed or repaired is noted before it becomes the reference for a new copy.
Giving the new key its electronic identity
A cut blade alone will turn the lock but will not start a car with an immobilizer, so the new key also needs the chip data the vehicle expects. Where the transponder supports it, the original's data is read and cloned onto a fresh chip directly, sometimes with the help of vehicle-specific data pulled from the car itself. Where cloning is not supported for that application, the locksmith instead connects to the vehicle's diagnostic port and walks the car's own security module through enrolling the new chip as an additional valid key, a process that can take longer but produces a key the vehicle recognizes on its own rather than one imitating another.
A record worth keeping
A short note of how many keys exist for the vehicle, what each one can do, and who holds it is a small thing to write down and a genuinely useful one to have later, whether that later is a private sale, an insurance question, or simply working out which key someone borrowed and forgot to return. This record also makes any future visit faster to start, since a returning locksmith or a different one entirely can begin from a known baseline instead of counting keys from scratch.
Spare Car Key Duplication
In the van
Key gauge and calipers
Code-cutting machine
VIN and key-system reference
Coin-cell fob battery
Chip cloning tool
Spare Car Key Duplication
What affects the quote
Sourcing the blank or shell
Common platforms use blanks kept in regular stock, while a less common model or an unusual shell sometimes has to be sourced specifically for that vehicle before work can begin.
Whether remote functions are included
A spare limited to the blade and chip that unlock and start the vehicle involves less programming than a full match of every remote button the original carries, and the quote follows whichever is chosen.
Authorization documentation
A vehicle registered to a business, financed through a lender, or owned by a family member sometimes needs an extra document confirming who may hold a key, which is sorted out before work begins.
What to have ready
- Do you know the VIN, or can you access the door jamb?
- Does the key have buttons, a chip, or neither?
- Do you want the spare to match every function, or just start the car?
Spare Car Key Duplication: questions
QuestionsWhat if I have lost track of how many keys already exist for the car?
That is worth mentioning when you call, since it changes the plan. If the count is genuinely unknown, or a key was lost at some point and never accounted for, reprogramming the vehicle to accept only the keys currently in hand is often the sounder route, rather than adding a new spare on top of an uncertain set that might include a key nobody can locate anymore.
How should I store the spare once I have it?
Somewhere other than inside the vehicle, since a spare kept in the glovebox solves little if it is the vehicle itself that becomes inaccessible. A bag that travels separately, a drawer at home, or a trusted family member all work. A passive proximity spare also benefits from a signal-blocking pouch during storage, since that kind of fob keeps broadcasting even sitting untouched in a drawer; a standard button-operated remote does not need the same pouch.
Why does the VIN matter for making a spare key?
The VIN identifies the exact immobilizer generation and lock system your particular vehicle left the factory with, which decides whether the chip can be copied directly or needs to be freshly coded through the diagnostic port, and which blank and blade profile are correct. Two cars that look identical from the outside can use different systems a model year apart, so the VIN removes the guesswork.
Related services
- Car Key ReplacementAfter fifteen years the blade has worn to a smooth sliver.
- Key Fob ProgrammingButtons on the fob still light up and the remote still clicks, but the vehicle refuses to start even with the fob sitting in the cupholder.
- Transponder Key ProgrammingEvery key that ever opened the car is gone at once, one taken with a stolen bag, the spare misplaced months ago and never replaced.