Car keys · Cambridge
Spare Car Key Duplication in Cambridge
The 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
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 goesTwo coworkers share one delivery van and one key between them, trading it at the start and end of every shift in a parking lot. A missed handoff leaves someone standing beside a locked van with nowhere else to be.
Cambridge
How the visit goes
Confirming what the spare needs to do
Not every household wants an identical twin of the original. Some ask for a plain mechanical spare with no remote buttons at all, useful for a valet or a young driver who does not need trunk release or remote start. Others want every function the first key has, cut and coded to behave exactly the same in anyone's hand. Settling this before work begins decides which shell is ordered and how much programming the visit involves, and it is worth revisiting if the household's answer turns out to differ from what the person calling first assumed on the phone.
Bringing a second vehicle onto the same key
Households running two vehicles from the same manufacturer sometimes want one key that opens and starts both, which needs more than a shared keyway: the two locks must also take a compatible bitting, or one vehicle's cylinders need rekeying to match, and the transponder chosen has to be capable of authorization on both immobilizers. The locksmith reads both vehicles' requirements before cutting anything, and where a single key genuinely will not satisfy both locks and both immobilizers, the answer is two separate keys carried on one ring, explained before any cutting starts so expectations match what the hardware can actually deliver.
What a lost key means from here
With a tested spare in hand, a lost original is worth acting on without delay rather than setting aside: the household still has a working key for the vehicle, and the locksmith can remove the lost key's access from the immobilizer so it can no longer start the car if someone else finds it. That step only addresses the electronics, though, so if the lost key's blade could still turn a matching door cylinder by hand, that cylinder is worth rekeying at the same visit rather than left as it was.
Spare Car Key Duplication
In the van
- Proximity fob shell
- Key duplicating machine
- Remote-head key shell
- Coin-cell fob battery
- Key blank matched to blade profile
What affects the quote
Same fees day, night or weekend
1Condition of the working key
A clean, unworn original traces onto a blank without much fuss, while a thinned or damaged blade may need cutting to a factory code instead, which is a different process with its own materials.
2Aftermarket alarms or remote starters
A factory system wired into a third-party alarm or remote starter can add extra steps to programming, since the added equipment sometimes changes how the vehicle's module responds during enrolment.
3Sourcing 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.
Spare Car Key Duplication: questions
What happens if I only have one key and it is for a car I just bought?
This is a common and straightforward call. The locksmith works from the single existing key and the vehicle itself, identifying the blade profile and reading or matching the chip, then testing the result on its own before the visit ends. It is also a good moment to confirm how many keys the car's history suggests should exist, since a private sale sometimes changes hands with an unknown key already out of circulation.
How long does making a spare car key usually take?
The time depends mainly on the key system rather than the blade. A plain mechanical key can often be duplicated within one visit, without extra electronic work. A transponder or remote-head key adds a cloning or programming step, done off the vehicle when the chip supports it and through the vehicle's own diagnostic port when it does not, with the diagnostic route usually taking longer. The locksmith can usually say which category your vehicle falls into once the make, model and year are known, before the appointment starts.
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.
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Spare Car Key Duplication near you
One team handles every service on this page for Cambridge, so a lockout can turn into a rekey, and a rekey into a properly set deadbolt, within the same visit if you want it. Each service is described separately below, but at the door they fit together as one piece of work.