Resource Guide · Car Keys
Lost Your Car Keys? A Step-by-Step Replacement Guide
If you've lost every key, a mobile locksmith can usually make and program a new one where your car is parked, for most makes and models. Start by getting safe, then gather your year, make, model and VIN.
- No tow needed for most vehicles
- What to have ready
- Locksmith vs. dealer
Step 1: Make sure you're safe
Losing your keys at a trailhead, a parking garage or a highway rest stop is stressful. Before anything else, get somewhere safe and lit. If you're stranded at night in an isolated spot, it's reasonable to call a friend or police non-emergency for help while you sort out the car.
If a child, pet or at-risk adult is locked in the vehicle along with the keys, this is no longer a lost-key problem. Call 911 if they may be in danger, then contact us about ILT Lifesaver, which provides free entry when the situation qualifies.
Step 2: Retrace and search (10 minutes, not an hour)
- Check the obvious: every pocket, bag compartment, the ground around the car, and the ignition or cupholder if a door is unlocked.
- Call the last place you were. Restaurants, gyms and stores keep lost-and-found bins.
- Check a tracker. If you attached a Bluetooth tag to your keys, open the app.
- Set a limit. If 10–15 minutes of searching finds nothing, move on to replacement options rather than losing the evening.
Step 3: Know what kind of key you had
The replacement process depends on the key. Here's a quick way to identify yours — for more detail, see our car key types explained guide.
Plain metal key
Common on older vehicles. No chip, just cut. The simplest to replace.
Transponder or remote-head key
Looks like a normal key, often with a thick plastic head or built-in lock/unlock buttons. Contains a chip the car must recognize before it will start.
Smart key / proximity fob
No key needed to start — you push a button. Must be programmed to the vehicle; often has a hidden emergency blade.
Step 4: Gather what the locksmith will need
- Year, make and model — and trim if you know it, since it can change the key type.
- The VIN. It's visible through the windshield on the driver's side dashboard and on the driver's door jamb.
- Proof you're authorized to have a key made, such as your ID plus registration or title if you have them. If those are locked in the car, tell us — we verify authorization before making keys, and our access to investigative verification resources gives us an unusual additional capability when identity or ownership needs to be confirmed.
- Your exact location, including parking garage level or space number.
Step 5: Choose locksmith or dealer
You have two main paths. Both can work; they differ in logistics.
| Mobile locksmith | Dealership | |
|---|---|---|
| Where it happens | Where your car is | At the dealer — the car usually must be towed there if no keys remain |
| Timing | Often same day, depending on vehicle and parts availability | Depends on service department schedule and key ordering |
| Hours | Many take evening and weekend calls | Typically business hours |
| Vehicle coverage | Most makes and models; some newer or luxury vehicles may require dealer-only procedures | Their own brand |
Some recent vehicles, particularly certain European luxury brands, have security systems that require dealer involvement for all-keys-lost situations. We program any vehicle that doesn't require dealer-issued tools, and VIN key-code lookups are available. That's why we ask for the year, make and model before dispatch — so we can confirm we can do your car before we roll.
What happens during an all-keys-lost job
- Verify authorization. The technician confirms you're authorized to have a key made for the vehicle.
- Get access to the vehicle without damage, if it's locked.
- Originate the key. The cuts are determined from a key code tied to the vehicle or by decoding the door or ignition lock.
- Cut the blade — standard edge-cut or laser-cut (sidewinder), depending on the vehicle.
- Program the chip or fob to the car's immobilizer through the diagnostic port.
- Test everything: start, doors, trunk, remote buttons.
The whole visit length depends heavily on the vehicle. While you're there, consider having a second key made — a spare is far less expensive than repeating an all-keys-lost job. See car key duplication.
What does replacing lost car keys cost?
Instant Locksmith TN standard pricing: lost car keys quoted before dispatch; smart key replacement quoted before dispatch. The final price depends on the vehicle and key type, and we confirm it before work begins.
- Ordered 7 AM–8 PM: standard pricing
- Ordered 8 PM–7 AM: 1.5× standard
- Federal holidays: 2× standard
- Federal holiday, ordered 8 PM–7 AM: 3× standard
Multipliers apply to the job (service, labor and parts); the $15 (inside city limits) or $25 (outside city limits) service call and the $1.25/mile mileage fee (beyond 5 miles from the nearest served city's center) stay flat. No weekend surcharge. Holidays are U.S. federal holidays, on both the calendar date and the observed weekday.
If your keys were stolen
If your keys were taken in a theft — especially along with your registration or anything with your address — report it to local police. Ask the locksmith whether old keys can be erased from the car's memory when the new ones are programmed; on many vehicles they can, so the stolen key will no longer start the car. If house keys were on the same ring, consider rekeying your home locks too.
Prevent the next time
- Keep a spare key at home and a second with someone you trust.
- Attach a Bluetooth tracker to your key ring.
- Photograph your VIN and keep it in your phone.
- Don't hide a spare on the car — thieves know the spots.
Lost car keys FAQ
Do I have to tow my car to the dealer if I lost all my keys?
Not usually. A mobile automotive locksmith can make and program a new key where your car is parked for most makes and models. Some newer or luxury vehicles require dealer-only procedures — tell us the year, make and model and we'll confirm before dispatch.
Can a locksmith program a key fob?
Yes, for most vehicles. Push-to-start proximity fobs and remote-head keys are programmed to the car's immobilizer through the diagnostic port. See key fob programming.
What information do I need for a replacement car key?
The year, make and model, the VIN (visible through the windshield and on the driver's door jamb), your exact location, and proof that you're authorized to have a key made.
Is it cheaper to copy a key than replace a lost one?
Yes, usually by a wide margin. Copying a working key skips decoding and some programming steps. That's why we recommend making a spare while you still have one.
Can the old lost key still start my car?
On many vehicles, previously programmed keys can be erased when new keys are programmed, so a lost or stolen key won't start the car. Ask the technician whether your vehicle supports this.
What if my key broke instead of getting lost?
A broken key is a different job. If part of it is stuck in the lock or ignition, see broken car key extraction; we can often cut a new key from the broken pieces.
Lost every key to your car?
Tell us the year, make and model. We'll confirm we can do it and give you a price before we dispatch.
