Adding a key
Introducing an additional transponder key while one working key still exists.
Programming
Car key programming
On-site programming for transponder and chip keys so the car recognizes the key and starts.
Car key programming is for chip keys, transponder keys, and other keys the vehicle must recognise before it will start. Cutting a blade is not the same task. If the car cranks the immobiliser and then refuses the key, programming is the page you want.
The visit is mobile. The programmer, the key, and the car need to be in the same place. Share the year, make, and model, and whether you still have one working key. Some cars allow a new key to be added with a working key present. Others need a different procedure when no working key remains.
If you need the physical key as well, start from car key replacement. This page is the coding step.
On the visit
Programming visits can cover
All keys lost
Programming when no recognized key remains, if that car allows it on site.
Transponder keys
Chip keys that must match the immobiliser, not only the door.
Keys supplied elsewhere
A check of whether a key you already have can be paired.
A start test
You confirm the engine runs and the key locks as agreed.
A clear limit
If the model needs a dealer step, that limit is part of the conversation.
Common situations
Match the symptom
New key will not start the car
The blade may be fine while the chip is not paired.
Spare key was never programmed
Common after a key was cut but never introduced to the car.
Car does not see any key
Say whether this followed a battery disconnect or a lost-key event.
Only the buttons failed
That is fob programming, unless the car also refuses to start.
Programming versus replacement
Order a replacement when you need a key made. Book programming when a key or chip already exists and the car will not accept it. A single visit can include both. They are separate pages so the intent stays clear.
Remote lock and unlock problems belong on key fob programming unless the car also refuses to start. Ignition problems, where the key will not turn, belong on ignition repair.
What to expect on site
The technician confirms the vehicle, checks that you may request a key, and explains whether programming can be finished at the roadside or driveway. You test the key before the visit ends. Dealer-only steps, when they exist for that model, are named rather than skipped over.
Questions
Practical answers
What is car key programming?
It is the step that introduces a transponder or chip key to the car so the immobiliser allows it to start. A key that only matches the door blade can still fail this step.
Can you program a key I already bought?
Sometimes. Bring the key and the vehicle details. Aftermarket and original keys are not equal on every model. If it cannot be paired on site, you will hear that before a long visit.
Is this the same as key fob programming?
No. Fob programming is about the remote functions. Car key programming is about the key the car uses to start. Some keys need both, and the quote should say so.
Do you program transponder keys?
Yes, where the vehicle allows on-site programming. Transponder key programming is part of this service, not a separate city page.
Related locksmith services
These pages cover a neighboring job in more detail.
Need a key programmed?
Include the year, make, model, and whether any key still starts the car.