Most cars manufactured after the mid-1990s use transponder keys, which contain a small electronic chip inside the key head. This chip communicates with your car’s immobiliser system, and the engine will only start when the correct chip signal is detected. CarKey Plus cuts and programs transponder keys on-site across Sydney.
How Transponder Keys Work
When you insert a transponder key into the ignition, your car’s immobiliser sends a signal to the chip. The chip responds with a unique code. If the code matches, the engine starts. If not, the immobiliser prevents starting.
This is why you cannot simply copy a transponder key at a hardware store. The physical key might fit, but without the correctly programmed chip, the car will not start.
Our Transponder Key Services
New Transponder Key
Key cut and chip programmed to match your vehicle's immobiliser.
Transponder Key Duplication
Spare transponder key created from your existing key.
Chip Reprogramming
Existing key's chip reprogrammed when it stops being recognised.
Immobiliser Troubleshooting
Diagnosing why your transponder key is not starting the car.
Transponder Key FAQs
How do I know if my car uses a transponder key?
If your car was made after 1995, it almost certainly uses a transponder key. The key head is usually thicker than a standard key because it contains the chip.
Can I get a transponder key from a hardware store?
Hardware stores can cut the metal blade, but they cannot program the electronic chip. Without programming, the key will open the door but not start the engine.
How long does transponder key programming take?
Typically 20–45 minutes depending on the vehicle make and model.
Need a Transponder Key? We Cut and Program On-Site.
Call CarKey Plus on 0419 115 162 for fast mobile service across Sydney.
