- Search carefully and check for a forgotten spare first; copying a working key is faster and cheaper.
- Don't tow the car yet; most cars can get new keys made on site by a mobile locksmith.
- Have your VIN, registration or title, and a matching photo ID ready before the technician arrives.
- Job time depends on key type: transponder, laser-cut and smart keys need programming and take longer.
If you’ve lost your only car key, the first thing to know is that you probably don’t need to tow the car anywhere. A mobile locksmith can usually cut and program a brand-new key right where the car is parked, as long as you can prove you own it. Before you make any calls, do a last search, then gather your VIN, registration and ID.
This is called an “all keys lost” job, and it’s more involved than copying a spare. Here’s how to handle it, step by step.
Step 1: Do one careful search before you spend money
It sounds obvious, but a calm, organized search finds a lot of “lost” keys. Check:
- Jacket and coat pockets, including ones you haven’t worn in a few days
- Bags, backpacks, gym bags and lunch boxes
- Between and under car seats, if you can see inside the car
- The front door lock, mailbox and the top of the car itself
- The last store, restaurant or office you visited (call and ask the front desk)
- Anyone else who drives the car, in case they have a spare they forgot about
Also ask yourself whether a spare exists somewhere: a kitchen drawer, a dealership envelope from when you bought the car, or a family member’s house. If you find a working spare, stop here and get a copy made. Making a spare from a working key is usually faster and cheaper than an all-keys-lost job.
Step 2: Don’t tow the car yet
Many people’s first instinct is to tow the car to the dealer. That can mean a towing bill, a wait for an appointment, and sometimes a key that has to be ordered and shipped.
A mobile locksmith with the right equipment can do the work in a driveway, parking lot or garage. At Public Locksmith, most cars can be done on site without a tow. If your car turns out to be one of the few that truly needs dealer-only work, you’ll find that out before paying for a tow, not after.
If the car is somewhere unsafe or will get ticketed or towed by a property owner, deal with that first. Otherwise, leave it where it is.
Step 3: Find your VIN
The Vehicle Identification Number (VIN) is a 17-character code unique to your car. Locksmiths use it to look up the key code and the correct key blank and chip type. You can find it in several places:
- Dashboard: look through the windshield at the lower driver’s side corner.
- Driver’s door jamb: a sticker on the door frame where the door latches.
- Registration card: your vehicle registration lists the VIN.
- Insurance card or policy: most insurance cards show the VIN.
- Title or loan paperwork: if you financed the car, your lender’s documents usually have it.
Take a clear photo of the VIN and double-check it. One wrong character can point to the wrong key.
Step 4: Gather proof of ownership
No honest locksmith will make a key for a car without checking that you have the right to it. We need proof of ownership before we make any car key. Have these ready:
- Vehicle registration or title in your name
- A government photo ID (driver’s license or state ID) that matches the name on the registration or title
If the paperwork is locked inside the car, tell the locksmith when you call. We can open the car first so you can get your documents out. Our car lockout service handles that part, and the key work follows once ownership is confirmed.
If the car is registered to someone else, like a spouse, parent or company, plan for that person to be there or to provide what’s needed. Ask about this when you call so there are no surprises.
Step 5: Know what kind of key your car uses
The type of key affects how the job is done and how long it takes. Here are the common types:
| Key type | What it looks like | What’s involved |
|---|---|---|
| Basic metal key | Plain key, no plastic head | Cut only (mostly older cars) |
| Transponder key | Plastic head with a hidden chip | Cut, then program the chip to the car |
| Remote-head key | Key and lock/unlock buttons in one piece | Cut, program the chip and the remote |
| Laser-cut key | Thick blade with a groove cut down the middle | Special cutting machine, plus programming |
| Smart key / push-to-start fob | No blade to turn; car starts with a button | Program the fob to the car’s system |
If you’re not sure, tell the locksmith the year, make and model, and whether the car starts with a key turn or a push button. That’s usually enough to know what you’re dealing with. For push-button cars, see our page on smart key and push-to-start fob replacement.
Step 6: Understand how a new key gets made
With no original key to copy, the locksmith builds a new one from scratch:
- Verify ownership. Registration or title, plus ID.
- Get the key cuts. Where possible, the key is cut by code from the VIN. If a code isn’t available, the locksmith decodes the lock itself, often at a door lock, to work out the cuts.
- Cut the key. The blade is cut on a machine in the van.
- Program the key. Transponder keys and smart keys have to be programmed to the car’s immobilizer, the anti-theft system that stops the engine from running without a recognized key. We do this with professional diagnostic tools through the OBD port, usually under the dashboard near the steering column.
- Test everything. The key should open the doors, start the car and, if it has buttons, lock and unlock remotely.
Some vehicles need extra steps, like reading a PIN code or programming a module on the bench. That adds time but can still often be done without a dealer. If you’re curious about the equipment, our article on what tools locksmiths use shows what’s in a mobile van.
While we’re there, it’s smart to have a second key made. Once you have two working keys, you never have to go through an all-keys-lost job again.
How long does it take?
There are two parts: getting someone to you, and doing the work.
- Arrival: In most of our service area around Charlotte, including Ballantyne, Matthews, Pineville, Fort Mill and Rock Hill, our typical response time is 20 to 35 minutes, depending on traffic and distance.
- The job itself: A plain cut key is quick. Transponder and remote keys take longer because of programming. Laser-cut keys, smart keys, and cars that need a PIN code read or module programming take the most time.
The fastest way to get a realistic time estimate is to call with your year, make, model and key type ready. Having your VIN and paperwork in hand also keeps things moving once the technician arrives.
What affects the cost
All-keys-lost jobs cost more than copying a spare because the key has to be created and programmed from nothing. The price depends on:
- The type of key (basic, transponder, laser-cut, smart key)
- Your vehicle’s make, model and year
- Whether PIN code reading or module programming is needed
- Time of day, since after-hours calls can cost more
- How many keys you want made
Our guide on what decides the cost of a replacement car key goes into more detail. Always ask for a quote before work starts.
Watch out for bad actors
When you’re stranded, it’s easy to call the first number you see. Before you hire anyone, ask for the full company name, confirm they’re licensed, and get a quote over the phone. In North Carolina, locksmiths must be licensed; Public Locksmith holds NC Locksmith License #2721. Our article on how to avoid locksmith scams lists the warning signs.
When to call
If you’ve searched, found no spare, and have your VIN and paperwork ready, you’re set. We make new keys where the car sits, 24/7 for emergencies. Learn more on our lost car keys service page, or call 704-905-6600 with your vehicle details for a quote.