Lost all your car keys? Here's where to start

First, work out which problem you have

If you can see the keys inside the locked car, you may only need help getting back in. If a spare is with someone else, find out whether they can bring it. A key that's present but won't start the car needs a different assessment from a missing key.

For a car parked in a Brooklyn garage, note the entrance, level and space number. The street address alone may send someone to the wrong side of the building.

Getting a replacement car key without the original

Have the year, make and model ready, along with the vehicle identification number, or VIN. Registration paperwork can help identify the car. Also explain whether it uses a turn-key ignition or push-button start.

Expect to be asked for identification and evidence that you're entitled to have a key made. If your documents are locked inside, explain that before arranging service. For a rental or company vehicle, contact the owner or fleet manager about their process.

A key number tag supplied with the car may be useful if you've kept it. It isn't the same thing as the VIN, and a VIN alone doesn't establish ownership.

Cutting a key and programming it are different jobs

Cutting shapes the metal blade to fit a lock. On a vehicle with an immobilizer, the car also has to recognize the key's electronic identity before it will start. A blade that turns isn't necessarily a complete working replacement.

Remote buttons and push-button starting add another compatibility question. Don't order a fob just because its case looks right. Confirm the correct part for your particular vehicle before buying.

Should you call a locksmith or the dealer?

Ask a mobile car locksmith whether they support an all-keys-lost job for your exact vehicle. Confirm whether the replacement part is available and whether the work can be completed where the car is parked.

A dealer is another route, including when a locksmith doesn't support the system. Ask whether the vehicle must be brought in, whether a key needs ordering, and what documents they require. Check those details before arranging a tow.

Compare the complete job: the key or fob, any blade cutting, programming, the visit and any after-hours charge. Ask which parts of the estimate still depend on inspecting the vehicle.

Once you have a working key again

Test starting and the features included in the replacement. Ask what can be done about the lost key's access; making a new key doesn't answer that question by itself.

Consider a spare while you have a working key, and keep it somewhere separate from the car.