"All keys lost" is trade shorthand for a specific situation: there is no working key anywhere, so there is nothing to copy. It sounds like a small distinction from having one spare. Technically it is an enormous one, and it explains a price difference that otherwise looks like opportunism.
Why having one key makes it easy
Your car does not recognize your key by shape. It runs a cryptographic conversation with a chip in the key head — the car issues a challenge, the chip computes a response, and the engine module releases fuel and spark only if the answer is right.
When you still have a working key, a locksmith can hold it up to the reader, watch that exchange, and in many cases simply clone its identity onto a new chip. The car cannot tell the difference because, as far as it is concerned, there is no difference. No programming session, no security access, nothing disturbed.
Why having none makes it hard
With no key to read, the only place that security data exists is inside the vehicle — in the immobilizer box, the instrument cluster, the body control module, or the engine module, depending on the manufacturer.
Getting it out is the entire job. There are three broad routes, and which one your car needs decides whether this is a 45-minute visit or a 3-hour one.
Route one: through the diagnostic port
Most domestic and Asian vehicles, and older European ones, allow a properly authenticated tool to request the security data through the OBD port under the dash. This is the fast path — typically 45 to 90 minutes including cutting the blade and testing.
Route two: module removal and bench work
Many later European vehicles refuse to hand over security data through the port at all. The relevant module has to be located, removed, opened, and read directly — sometimes through a dedicated connector, sometimes by making temporary connections to the circuit board itself.
This means interior trim comes off and goes back on, the module gets read and rewritten, and everything is reassembled. Two to three hours is normal. Anyone quoting thirty minutes for a European all-keys-lost either misunderstands the job or intends to hand it to someone else.
Route three: manufacturer security server
Newer platforms increasingly gate key programming behind an online session with the manufacturer, where the tool authenticates and requests permission to add a key. This requires maintained credentials and an internet connection at the vehicle. It is quick when it works, and impossible without the access.
What happens step by step
- Ownership is verified. Photo ID against registration, title, or insurance. This happens before anything else, every time.
- The platform is identified. The VIN tells us the exact security architecture — which matters enormously, because two identical-looking cars a few months apart can differ.
- Key code is retrieved and the blade cut. We cut to your factory code rather than copying a worn key, so the new key matches your original lock wafers.
- Security data is extracted. Via the port, the module, or an online session, depending on the vehicle.
- The new key is written in. And, if you ask, every previously issued key is erased.
- Everything is tested. Start from cold, cycle every remote function, confirm no fault codes remain.
Should you erase the old keys?
Almost always yes, and it takes minutes during a visit you are already having.
If your keys were stolen rather than misplaced, erasing them is the difference between a lost key and a working key in a stranger's pocket. If you bought the car used, you genuinely cannot know how many keys exist — a previous owner, a valet, a dealership, or a family member may still have one. Erasing unknown keys is cheap insurance.
How to avoid ever needing this
Get a spare while you still have a working key. That is the whole answer. It costs a fraction of all-keys-lost, takes twenty minutes, and can be done in your workplace parking lot on a lunch break. The people who call us for all-keys-lost are almost never people who had two keys.
Want this checked on your actual car?
Guides only get you so far. Call with your year, make, and model and we’ll tell you what applies to your vehicle specifically — including when the answer costs you nothing.