Record included keys and agree used-car handover terms

The short answer: a spare key is not guaranteed

A used car comes with whatever keys the seller hands over, and that may be one key, two, or occasionally more. New cars are commonly supplied with more than one key, but after years of ownership keys get lost, broken or kept by a previous owner. Treat the number of keys as something to confirm and write down, not something to assume. If a second key matters to you, and for most buyers it should, make it part of the agreed purchase terms before you pay: either the seller supplies it, the price reflects the cost of getting one, or you accept the car with a single key knowing what replacement involves for that specific vehicle.

Two conditions change how much this matters. First, the type of key: a plain metal key is a different proposition from a key with a chip or a smart fob, because many modern keys must be matched to the car electronically before they will start it. Second, who else might still hold a key: a missing spare is not only a replacement cost, it may be a key that still works and is in someone else's hands.

Key terms worth knowing

• Transponder key: a key containing a chip that the car's immobilizer must recognize before the engine will run. Cutting the metal blade alone is often not enough to make a working copy.
• Remote fob: a separate or built-in remote that locks and unlocks the doors and may open the trunk or trigger an alarm.
• Smart key or proximity key: a fob that lets you unlock and start the car without inserting a key, typically with a push-button start. Many contain a small mechanical emergency blade.
• Valet key: on some vehicles, a key with restricted functions, such as not opening the trunk or glovebox. It is not always equivalent to a full spare.
• Promised key: a key the seller says exists or will provide later but has not physically shown you.

Which of these applies depends on the make, model year, market and trim. Toyota buyers, for example, may find a traditional key, a key with an integrated remote, or a smart key system depending on the model and equipment level. The owner's manual for that exact vehicle is the reference for what each key type should do.

Build a key inventory at the viewing

Give every physical item the seller shows you a label, such as K1, K2 and K3, and record the same details for each one. Count only what you can hold. Anything the seller mentions but does not produce goes on a separate line as a statement, not as an item.

KEY INVENTORY
Vehicle: ____________  VIN: ____________  Date: ________

Label | Description            | Seller says it is | Presented or promised | Manual reference | Observed operation | In written terms?
K1    |                        |                   |                       |                  |                    |
K2    |                        |                   |                       |                  |                    |

Seller statements about other keys (not verified):
______________________________________________

Check each key in a set order

• 1. Confirm you are looking at the right car by matching the VIN on the vehicle to the title and listing.
• 2. Ask the seller to bring out every key and fob that will be included in the sale.
• 3. Using the owner's manual for that vehicle, agree which functions you will check for each item, such as locking, unlocking, trunk release and starting the engine.
• 4. Test each item yourself and mark every function as demonstrated, not demonstrated or unresolved.
• 5. Compare the finished inventory against what the sale agreement will say before anything is signed.

Test each key on its own. A spare fob that unlocks the doors but does not start the car, or a valet key mistaken for a full key, only shows up when every item is checked separately. This is an observation exercise, not a repair: do not attempt programming or reset procedures as part of the viewing.

If a key is missing or does not work

Ask for a written quote from a dealer or qualified locksmith for that specific vehicle before you settle on a price. Costs and lead times vary widely by make, model and key type, so a general figure from an online thread is not a reliable basis for negotiating.

• Questions to put to the person quoting:
• Which vehicle, by VIN, is the quote for?
• What exact item would be supplied: blade key, transponder key, remote, smart key?
• What work is included: cutting, programming, testing?
• What is needed beforehand: the car on site, an existing working key, proof of ownership?
• How long until it can be done?
• What fees apply, and how long is the quote valid?
• Can keys previously matched to the car be removed from its memory, and is that included?

Then decide with the seller who arranges the work, who pays, and whether it must be finished before handover. Until a replacement is actually made and tested, treat it as pending.

Write the key terms into the deal

Verbal promises about a spare key are easy to forget once money changes hands. Put the key arrangement in the written purchase terms in plain language that separates what you saw working from what is still owed.

Illustrative example: "K1 presented; operation recorded on viewing sheet. K2 promised by seller for collection; delivery date and responsibility to be written into the agreement."

At collection, check the items you receive against the inventory, test any newly delivered key the same way you tested the others, and update the sheet. Keep the completed sheet with your purchase paperwork.

What the inventory cannot tell you

Recording two working keys proves those two keys work. It does not prove no other key exists or that an old one has stopped working. If the seller says a key was lost, or you have any doubt, ask a dealer or locksmith whether the vehicle's system can be set to accept only the keys you hold, and weigh that cost alongside the purchase price.