House lockouts
Re-keying
Deadbolt upgrades
Smart locks
Schlage
Kwikset
Car keys & fobsNon-destructive entry first, always - and we re-key Schlage, Kwikset, and Baldwin locks on the spot while you watch
You get a price before we start. It does not change when we arrive. No surprises.
Get your free estimateTrusted Car Key Replacement for Key Homeowners
Lost your only car key in Key? We replace it the same day, usually within a couple hours of your call. Thornton Lock & Key has handled car key replacement for drivers across Key for years, and we do it without the dealership markup or the week-long wait. Len Thornton built this business on showing up when it counts, and a missing key at 7 a.m. on a workday is exactly that. Call (888) 455-7175 and we’ll give you a firm price before we ever dispatch a tech.

What Our Car Key Replacement Service Includes
Car key replacement is not one single service. It covers three different scenarios, and each one needs different tools and a different approach. Here’s what we actually do when you call us from Key:
Transponder Key Programming
Most cars made after 2000 use a transponder chip inside the key. The engine computer will not start without that chip’s unique signal. A plain metal key cut at a hardware store will turn the ignition but the car will not start, and in some models it will lock the ignition out entirely until a proper key is programmed. We carry transponder keys and the programming equipment to pair them with your vehicle right in your driveway in Key. No tow to the dealer, no second trip.

Key Fob and Remote Replacement
If your key has buttons for unlock, lock, trunk, or remote start, that is a fob, and fobs fail in ways plain keys do not. Batteries die, buttons wear out, circuit boards crack, and sometimes the fob itself is simply lost. We source replacement fobs for the most common makes and program them on the spot. The old fob gets disabled in the car’s system so it cannot be used to take your vehicle, which matters more than most people realize.

Lost Key and No-Spare Solutions
Losing the last working key is the worst version of this problem, and we treat it that way. We can originate a new key from the vehicle itself, even when no original key exists to copy. The process reads the immobilizer system and builds a fresh key that the car will accept. We handle this for Key drivers regularly, and we make a point of cutting a spare right then so you are not back in the same spot next month.

Key Cutting and Duplication
If you still have one working key and just need a backup, we cut duplicates on the spot. This applies whether your key is a standard edge-cut or a high-security laser-cut key with a sidewinder groove. Laser-cut keys cannot be copied with the hardware-store equipment most people try first, but our machines handle them without issue. A spare key costs less than one lockout call, and we will say that plainly to any Key driver who calls.

What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Styles & brands we work with







Brands We Service for Car Key Replacement
We keep our inventory broad because we never know what will be parked in a Key driveway next. On the residential side, we work heavily with Yale and Baldwin hardware, and that daily experience with precision-cut keys and tight tolerances carries directly into our automotive key work. Yale and Baldwin are not auto brands, but the standards they enforce in their lock tolerances are the same standards we apply when we originate a new car key. The cut has to be exact, every time.
We also service vehicles equipped with higher-security key systems from manufacturers like Sargent, whose pin-and-key geometry teaches a locksmith more about key profiling than any consumer brand. And when a Key customer asks whether we can handle a Mul-T-Lock key or a more specialized cut, the answer comes from experience, not from a script. Whether you drive a domestic, an import, or something less common, we can look up your exact key code and get to work. If we cannot do it on site, we will tell you before you pay a cent.
Signs You Need Car Key Replacement Right Now
- Your key is bent or cracked at the base. A key that is visibly deformed can snap off in the lock cylinder or ignition, and extracting a broken key is a bigger job than replacing it beforehand. If the metal flexes or the plastic housing is splitting, do not wait.
- The key works in the door but not the ignition. This almost always points to a transponder chip failure or a worn key profile. The car is not broken, but the key is, and replacing it now beats getting stranded somewhere in Key after dark.
- Your fob only works intermittently. If you have to press the button three times, stand closer, or reposition yourself, the fob’s signal is dying. A dead fob means a locked-out morning on the way to the office. Replacement now is cheaper than an emergency call later, and we do not charge a call-out surcharge on arrival, which is exactly when the bait-pricing places tack on the fee.
- You are down to one working key. One key means one accident, one misplaced jacket, one curious toddler away from a problem. Every Key driver we serve leaves with a spare if they want one, because a spare key is an insurance policy that costs less than a single emergency response.
- You just bought a used car with only one key. Private-party sellers rarely mention that the second key is long gone. You should assume any missing key for your new-to-you car is still out there somewhere. We can erase the old keys from the vehicle memory and cut and program fresh ones so only the keys in your hand will start the car.
Our Car Key Replacement Process – Step by Step
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You call and describe the vehicle. When you reach us at (888) 455-7175, we will ask for the year, make, and model, plus whether you have any working key at all. That tells us which key type, chip, and programming route we are dealing with. We give you a firm price on the phone, quoted before anyone gets in a truck to drive to Key.
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We confirm key compatibility and source the blank. Some keys are common enough to keep on the truck. Others we order or pull from the shop before dispatching. Either way, we know the key is right before we arrive, because we looked up your vehicle’s key code, not just the year and model. Generic fitments cause half the no-start problems in this trade, and we avoid them entirely.
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The technician arrives and cuts the key. For a replacement key from an existing key, we use the original to reproduce the cut pattern on the spot. For a lost key or no-spare situation, we originate a new key by reading the vehicle’s lock and immobilizer system directly. Both methods are done in your driveway in Key, not in some back office.
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We program the transponder or fob. Programming pairs the new key’s chip or remote with your car’s computer. We use dealer-grade diagnostic tools, the same class of equipment a dealership uses, because the cheap handheld programmers cannot always clear old keys or program newer vehicles. We test everything before we call the job finished.
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We verify function and hand you the price. Start the car twice, test every button, cycle the lock, and then you pay the number you were quoted on the phone. No add-ons, no fuel surcharge, no after-hours surprise. The price we quote in Key is the price on the invoice. If you want a spare cut at that point, we will do it right then for less than you would pay coming back later.
How Much Does Car Key Replacement Cost in Key?
Car key replacement in Key runs a wide range because the key itself varies so much by vehicle. A standard transponder key for an older sedan typically falls between $150 and $250. A laser-cut or sidewinder key usually lands between $200 and $350. A full key fob with remote start and proximity sensing can run from $250 to over $450 depending on the make. The labor to program the key is included in every quote we give, so the number you hear on the phone is the number you pay. We do not add a call-out surcharge when the tech arrives, and we do not advertise a teaser price that only covers the metal key and not the programming. The price we quote for your car in Key is the full price, period.
What actually affects the price is straightforward: whether you have a working key to copy or we need to originate from the vehicle, whether the key is a plain transponder or a full fob, and whether you want us to erase old keys from the vehicle memory for security. The estimate is free, and it takes about two minutes on the phone. If you have been quoted something wildly low somewhere else, ask them what it includes. A lot of Key drivers have learned the hard way that the $49 advertised key turns into $300 once the tech is standing in the driveway. We would rather tell you the honest number up front and let you decide.

Car Key Replacement Near Key – Our Service Area
Thornton Lock & Key runs car key replacement jobs in Key and throughout the surrounding valley. We regularly serve drivers in Chandler, San Carlos, and Gilbert, as well as Mesa, Tempe, and Scottsdale. Most key replacements are completed within two hours of the first call, including travel time. Go back to the home page if you want a broader look at our automotive and lock services.
Serving Key, AZ — Our Local Coverage Area
We’re based in the Key area and know this community well, and we also offer Sun Lakes Car Key Replacement nearby. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Frequently Asked Questions – Car Key Replacement in Key
Car key replacement means producing a new working key for a vehicle when the original is lost, stolen, broken, or worn out. It involves cutting the mechanical key to match the lock and, for most modern vehicles, programming a transponder chip or remote fob to the car’s computer. The work can be done on-site in Key with the right equipment, which we carry.
A standard transponder key replacement with a working key to copy usually takes 30 to 60 minutes on site. A lost-key job where we originate from the vehicle can take 90 minutes to two hours. The fastest way to get an exact answer for your car is to call (888) 455-7175 and tell us the year, make, and model.
Most car key replacements in Key run between $150 and $450 depending on the key type and your vehicle. A basic transponder key sits at the low end, a full proximity fob at the high end. The quote you get on the phone is the full price on the invoice, with no arrival surcharge. Call (888) 455-7175 for a firm number for your specific car.
We service the vast majority of vehicles on the road in Key, from common domestic and import models to luxury makes with laser-cut keys and encrypted transponders, and we offer Car Key Replacement – Guadalupe as well. If we genuinely cannot program your specific vehicle, we will say so on the first call instead of sending a tech out to fail in your driveway. That honesty costs us a little money sometimes, and it is how we prefer to work.
Yes. If you are locked out in Key with no key at all, we treat it as an emergency call. We dispatch as quickly as possible, cut and program a new key on site, and then verify the car starts before we leave. Call (888) 455-7175 and describe the situation; we will give you a straight estimate and an honest arrival window.
Each replacement key and fob we supply is warrantied against defects in the key itself and in our programming work. If a key we cut or a fob we programmed fails, we will make it right at no charge. We stand behind our work because our name is on the business. Len Thornton has not built a reputation on walking away from a bad key.
Have the year, make, and model of your vehicle ready, and ideally the VIN, which is visible on the dashboard near the windshield. That lets us verify the exact key type and programming path before we dispatch. Also let us know whether you have any working key at all, because that changes the whole method. Then call (888) 455-7175 and we will take it from there.
Schedule Your Car Key Replacement Service in Key Today
One call gets you a firm price, a real arrival window, and a key that starts your car in Key tonight. We quote the full number on the phone, no call-out surprises, no dealership wait. Call (888) 455-7175 and we will send a technician who knows exactly what your vehicle needs.
Written by Len Thornton, Owner at Thornton Lock & Key, serving Key and the surrounding valley.