One working key or none?
A remaining key is a useful detail even if it belongs to another household member. Say whether it opens the door, starts the vehicle and operates any remote buttons. If no key remains, state that clearly rather than describing the request only as a copy or an extra key.
For a broken or unreliable key, explain what changed and keep its pieces available for discussion. Do not assume that replacing the outer casing, copying a metal blade or supplying a remote will solve the whole problem. The requested functions and the vehicle's requirements need to be considered together.
Check the functions you actually need
The word key can mean several things in a car conversation. You may need door access, a starting function, remote buttons or a combination of them. Ask which functions are included in the proposed replacement and how they will be checked before considering the job complete for your vehicle.
If you already purchased a key or fob elsewhere, mention that before making arrangements. Matching a photograph or model description does not establish compatibility. Ask whether customer-supplied hardware can be considered, and do not count on it working until its suitability for the particular vehicle has been confirmed.
Plan around where the car really is
After a Neponset outing, your walking route and the location of the parked car may be different. Give the street, lot or entrance where the vehicle is waiting, along with the municipality. A nearby station or river access point can add context, but should not replace the parking details.
For a spare-key request at home, say whether the car and any working key can be present together. Ask what proof of ownership or permission is required, which costs are included and whether any limitations apply. Clear answers make it easier to choose a sensible next step without assumptions.
BEFORE YOU ARRANGE WORK
A few useful answers.
Can a replacement be discussed without an original key?
Yes, but say at the start that no working key remains. The year, make, model and ownership information become especially useful. Support and the required work depend on the vehicle, so a replacement should not be promised before those details are checked.
Will a new key include remote buttons?
Ask what functions are included in the proposed option. Door access, starting and remote controls are not the same requirement. Be clear about which functions you want to retain, and confirm how the finished key will be checked with your vehicle.
Is a planned spare request different from a lost key?
It can be. A planned spare usually lets you gather the vehicle and an existing working key, while a lost-key situation may also involve access. Explain which applies, then ask about availability and compatibility before choosing an appointment or other arrangement.