Car Key Replacement in Marietta, GA
A car key that only opens the door isn't finished. Most cars built since the late 1990s have an engine immobilizer, a built-in system that checks for a matching transponder chip before the engine will run. Peach Locksmith LLC replaces car keys in Marietta and across the Atlanta metro by doing both halves of the job: cutting the metal blade to fit your locks and programming the chip so your car recognizes the new key.
A working car key needs a cut blade and a paired chip
Car key replacement means shaping the blade to your locks and pairing the transponder chip with your car, then proving the engine starts.
The blade is the shape. The chip is the handshake. A plain copy can turn your door lock and even your ignition, but if the car uses an immobilizer and the chip isn't paired, the engine won't run. Before we make anything, we check which type of key your car takes: a cut key, a chip key, or a laser-cut key.
- Cut keyMetal blade only. Key blade cutting is the whole job.
- Chip keyBlade plus transponder chip. Needs cutting and programming before the engine will start.
- Laser-cut keyAlso called a sidewinder. A groove runs along the middle of the blade, so it needs a different cutting machine than a flat key.
The key that opens the door but won't start the car
Here's a call we get often. It's a common pattern, not one customer's story.
Someone's only key snapped or went missing. They had a basic metal copy made. It unlocks the driver's door. It turns in the ignition. The engine just won't start.
The copy got the blade right. What it doesn't have is a transponder chip the car knows. The immobilizer asks for a matching code, gets nothing it recognizes, and keeps the engine off.
A chip can't be copied the way a blade can. The car has to learn the new key. That pairing step is transponder key programming, and on many vehicles it's done through the OBD-II port, a plug under the dashboard.
So the fix is both halves: a blade cut for the door and ignition, and a chip paired to the car. Then a test start to prove it.
If the key turns but nothing happens at all, with no dash lights, the ignition itself may be the problem. That's a separate job for our ignition repair service.
- Ownership
- Registration or title seen before any key is made
- VIN
- 17-character vehicle ID
- Blade
- Flat or laser-cut
- Chip
- Transponder or none decides whether programming is needed
Then we tell you plainly: cut, chip, or both.
Most of the confusion around car keys comes from treating them as one piece of metal. They're often two systems in one key, and both have to be right before the job is done.
Car keys for the I-75 and I-285 commute
Our team dispatches from 2108 Austell Rd SW in Marietta, inside Cobb County.
No third-party dispatch. Crews leave from Marietta and reach metro homes within the scheduled window.
Plenty of Marietta mornings start with a merge onto I-75 or I-285. That drive needs a key that starts the car, not one that only opens the door.
Cobb County has its own key patterns. Used cars often change hands with a single key. Families connected to Dobbins Air Reserve Base move often, and spares get lost in boxes along the way.
When the last key goes, the job starts with one question: blade, chip, or both? We bring the cutting and programming tools to you.
What to have ready when you call
Your registration or title and your VIN are the fastest way to start.
We ask to see proof of vehicle ownership, meaning your registration or title, before we make any car key. Have it on hand when we arrive.
Your VIN is usually at the base of the windshield on the driver's side. It points us toward the right blade style and chip type. If your key snapped, keep the pieces. The old blade can help guide the new cut.
Tell us your car's make, model, and year. We'll explain what your key needs.
How we handle every car key replacement
Every key we make is matched to your car's make, model, and year.
- Ownership comes firstwe see your registration or title before we make any car key
- The VIN guides the key choiceit points us to the right blade style and chip type for your vehicle
- The right machine for each bladeflat keys and laser-cut keys are cut on equipment built for each
- Pairing through the OBD-II porton many vehicles, transponder programming connects at the plug under the dashboard
- Fobs are their own jobremote lock buttons need a separate setup through our key fob programming service
- Tested before we call it donedoor, ignition, trunk lock if there is one, and an engine start
- One local teamdispatched from our Austell Road base in Marietta
Cut the blade, pair the chip, test the start
Three steps, in order: check the car, make the key, prove it starts.
Diagnostics
We confirm proof of vehicle ownership first. Then we read the VIN, check the lock style, and see whether your car uses a transponder chip. Got a snapped key? Keep the pieces. The old blade can help guide the new cut.
Implementation
Key blade cutting comes next, on the right machine for a flat or laser-cut blade. Then we plug into the OBD-II port and pair the chip so the engine immobilizer learns the new code. Lost every key with no spare at home? The steps are the same, minus the copy. We work out the cut from your vehicle instead. On many cars, pairing a new key also lets the car forget a lost one, and we'll tell you if your model supports it.
Post-service testing
We test the key in the driver's door and the ignition, and the trunk too if it has a key lock. Last, we start the engine. A key isn't finished until your car runs on it.
Car keys replaced across Marietta and the Atlanta metro
We replace car keys across Marietta, Cobb County, and the greater Atlanta metro.
That covers Smyrna, Kennesaw, Acworth, Mableton, Austell, Powder Springs, and Vinings. We also serve Roswell, Alpharetta, and Decatur, and up I-75 toward Woodstock and Canton. Call with your address and we'll confirm we can reach you.
- Smyrna
- Marietta
Car key questions
Why does my copied key open the door but not start the car?
The copy has the right blade shape, so it turns the lock. But many cars built since the late 1990s have an engine immobilizer that checks for a paired transponder chip. A plain copy has no chip, or one the car has never learned, so the engine stays off. The key needs to be programmed to your car.
Can you make a car key if I've lost every key?
Yes. Lost-key replacement follows the same steps as a copy, minus the original. We work out the cut from your vehicle, cut the blade, pair the chip, and test the start.
What do I need to show before you make a key?
Proof of vehicle ownership, meaning your registration or title. We ask to see it before we make any car key. Having your VIN handy also helps us identify the right key type.
Where do I find my VIN?
The VIN is your car's 17-character ID number. You'll usually find it at the base of the windshield on the driver's side. It helps us pin down the right blade style and chip type.
Will my lost key still start the car after you make a new one?
On many cars, pairing a new key also lets the car forget a lost one. It depends on the model, so we'll tell you whether yours supports it when we check the vehicle.
Other services we provide
Get a car key that opens the door and starts the engine
One call gets your blade cut, your chip paired, and your engine tested.
Call Peach Locksmith LLC at (678) 824-6578 or email info@peachlocksmithllc.com. Have your registration or title and your VIN ready. That's the fastest way to start.