Car keys · Georgina
Spare Car Key Duplication
The blade on the everyday key has gone shiny and thin along one edge, and lately it needs a wiggle before the ignition catches.
In plain words
A vehicle used by more than one person, such as a shared family car, a small business van or a vehicle looked after by a caretaker, works better with a key for each regular driver rather than one ring changing hands. Spare key duplication from the working original gives every driver an independent, fully tested key: matched blade, matched chip or remote code, and confirmed operation in every door and the ignition before anyone leaves. Keeping a record of how many keys exist and who holds each one also makes accounting for all of them simpler later on.
How the visit goesThe 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. One worn blade on a single ring is now the entire access system for the vehicle.
Spare Car Key Duplication
How the visit goes
Confirming who the vehicle belongs to
Before a blank is cut or a chip is touched, the locksmith establishes who is asking and their authorization for the vehicle: a piece of photo identification alongside registration matching a name and address, or another document connecting that person to the car. A rental, a company vehicle or a car still financed through a lender may need an extra document confirming who is authorized to hold a key to it. This check is made at every visit rather than assumed from an earlier one, since who owns or is authorized to use a vehicle can change between one spare and the next.
Matching a remote head or fob
When the original carries buttons for locking, unlocking or remote start, the new key or fob is programmed to the vehicle's receiver so those same functions respond from the spare. This usually means putting the vehicle into a programming sequence from inside the cabin, then pressing the new remote's buttons in the order the manufacturer specifies. Some platforms allow this through the doors and ignition alone; others need the diagnostic port involved as well, particularly when the remote functions are tied into the same module that manages the immobilizer, so the two steps happen together rather than separately.
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
VIN and key-system reference
Transponder chip
Deburring file
Coin-cell fob battery
Chip cloning tool
Spare Car Key Duplication
What affects the quote
Manufacturer-specific security systems
Certain manufacturers build key systems that call for specialized equipment or additional authorization steps, which can mean more time at the vehicle than a more widely supported system.
Fob battery and physical condition
A fob that needs a fresh battery or shows cracking or water exposure adds a small amount of extra work beyond programming a key that is otherwise in good shape.
How many keys are needed
Making one spare is a smaller job than producing several matching keys for a whole household or a small fleet in the same appointment, and the quote reflects how many are wanted.
What to have ready
- Is the current key showing any wear, cracks or a weak battery?
- Do you know the VIN, or can you access the door jamb?
- Do you want the spare to match every function, or just start the car?
Spare Car Key Duplication: questions
QuestionsCan a spare be made if the vehicle has an aftermarket alarm or remote starter installed?
Generally yes, though it is worth mentioning any aftermarket system when you call, since a factory immobilizer that has been wired into a third-party alarm or remote starter sometimes behaves differently from the standard setup the locksmith expects. Knowing this in advance lets the visit account for it rather than discovering it partway through programming.
How is the electronic chip handled during duplication?
Where the transponder supports it, the chip in the working key is read and its data cloned onto a fresh chip, sometimes with vehicle-specific data pulled from the car to help. Where cloning is not supported for that particular vehicle and chip, the locksmith instead connects through the diagnostic port and has the car's own security module enrol a freshly coded chip as a new, independently authorized key.
Can a spare be made from a key that is already worn?
Yes, and it is often a good reason to make one. Rather than tracing every rounded edge of a worn blade onto the new copy, the locksmith can decode the lock or cut to a valid factory code for the blade, then read or clone the chip data separately for the electronics, producing a spare that is cleaner than the original rather than a copy of its wear. The worn key can then be compared against the fresh one and retired if it is due for that.
Related services
- Car Key ReplacementYou bought the car privately and it came with a single key on a shoelace.
- Key Fob ProgrammingA replacement fob just arrived in its box, shiny and untouched.
- 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.