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Two brass house keys on a ring resting on a workshop counter. — Spare Car Key Duplication, Erin Mills

Car keys · Erin Mills

Spare Car Key Duplication

A lockout last month ended with a locksmith opening the door and going home, and the same single key has been carried ever since with nothing behind it. The relief of getting back in faded within a week into the same exposure.

In plain words

A vehicle that arrives with only one working key is a common situation after a private sale or an estate transfer, and it is one of the more straightforward calls a locksmith takes. Working from the single key and the vehicle itself, the blade is duplicated or cut to code, and the immobilizer chip is matched or freshly programmed so the new key is recognized on its own. Both keys are tested in the doors and the ignition before the appointment ends, which also gives the vehicle a documented second key from that point forward instead of an unknown history.

Sound familiar?Erin Mills

The call
One key opens the car, starts the car, and rides in one pocket every day. Nothing backs it up. A dropped storm drain, a torn pocket or a moment of distraction would leave the household without a way to drive anywhere tonight.

NextHow the visit goes

Spare Car Key Duplication · Erin Mills

How the visit goes

Hands fitting a steel door knob into the bore of a dark door, with a yellow drill and tool bag behind. — Erin Mills
  1. Scene 1

    Assessing the fob's electronics

    Where the key includes a remote or a proximity fob, the locksmith checks the battery, tests every button against the vehicle, and confirms whether functions like remote start, a panic alarm or a power hatch release are part of what the spare needs to reproduce. A fob that has been dropped or exposed to water sometimes still passes buttons but fails intermittently, which is worth knowing before it becomes the pattern a new key is measured against. Confirming the battery type while the shell is open also saves a second trip later when it eventually runs down on its own.

  2. Scene 2

    Building a spare for a worn original

    A key that turns with a wiggle or a fob with a soft button is not traced fault and all; instead the locksmith decodes the lock or cuts to a valid factory code for a clean blade, and separately reads or clones the chip data for the electronics, so the new key is built clean rather than inheriting the original's wear. Once the fresh key operates correctly, the worn original can be compared against it side by side, which often shows the household how much the daily key has degraded and helps decide whether it is time to retire it in favour of the newly made pair.

  3. Scene 3

    Keeping the household on one system

    If the household runs more than one vehicle or more than one driver, this is a natural point to confirm every key still works the way it should: the original, the new spare, and any older keys already sitting in a drawer. A round of testing the whole set against the vehicle, rather than assuming a key still works because it once did, catches a fob with a fading battery or a blade that has quietly started to wear before it turns into a problem on a morning when someone is already running behind schedule.

In the van

  • Key gauge and calipers
  • Proximity fob shell
  • VIN and key-system reference
  • Chip cloning tool
  • Transponder chip

What shapes the quoteErindale Lock Experts

Matching two vehicles to one key
Bringing a second vehicle onto the same key, when the two lock systems are compatible, takes more identification and testing than producing a spare for a single car alone.
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.
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.

FeesSame any hour

Have it ready

Before you call · 0 / 3

(289) 805-4851

Let's clear a few things up

Will the spare include the remote buttons?

If the original has remote buttons and you want the spare to match, yes: the new key or fob is programmed to the vehicle's receiver so locking, unlocking and any other remote function respond the same way from either key. If a simpler spare is preferred instead, the remote portion can be left out while the chip that starts the car is still fully recognized.

Is it possible to leave out certain functions on the spare, like remote start?

Yes. A spare can be built to do everything the first key does, or scaled back to just the blade and chip that unlock a door and start the engine, without a remote start button or a trunk release. This is agreed before programming begins and is a deliberate choice rather than a lesser copy, useful for a valet, a young driver, or anyone the household wants kept to essential access.

What should I bring to the appointment?

Bring the vehicle, its existing key, photo identification, and something that ties you to the vehicle: registration, or a document showing you are authorized to hold a key if the car belongs to someone else, such as an employer or a family member. Knowing the VIN in advance, printed or photographed from the door jamb, also helps the locksmith confirm the exact key system before arriving.

Erin Millsinformation

PeelOntario

Town
Erin Mills, Peel
In business
27 years
Hours
Open 24/7
Nights, weekends and holidays, same fees
Visits
On-site assessment preferred. Request a visit or call.

2021 census: what it means at the door

Every square is one home in a hundred.

  • 38 in 100 homes · mixed ages
  • About 38% of homes in Mississauga were built in 1980 or earlier, according to the 2021 Census.In an area of varied housing ages, rekeying is the one job that fits every door. Old cylinders and new ones both take fresh pins, so a household moving into either kind of home can start with keys that nobody else holds.
  • Single-detached houses make up about 37% of homes in Mississauga (2021 Census).Attached housing turns over more often than detached, so rekeying between tenants or owners is a constant. Because suite doors tend to be standard, the job is usually a straightforward pin change and a fresh set of keys cut on site.

Source: Statistics Canada, Census Profile

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On-site assessment

Request a visit.

A lockout last month ended with a locksmith opening the door and going home, and the same single key has been carried ever since with nothing behind it.

(289) 805-4851, open 24/7.