Transponder Key Programming in Birmingham
Transponder key programming codes the small chip inside a car key to the immobiliser, so the car recognises the key and allows the engine to start. Without that code, the key may turn in the lock but the engine will not start. This service is mobile: the technician comes to your car in Birmingham, West Midlands, UK, and programs the chip there.
What is transponder key programming?
A transponder chip is a tiny chip inside the head of the key. When the key is turned, the chip sends a code to the car, and the immobiliser checks that code against the keys it knows. If the code matches, the engine starts. If it does not match, the engine stays locked out, even when the key fits the lock.
Programming writes the chip code into the car memory through the diagnostic port, so the immobiliser accepts the new key as one of its own. The blade is cut first, then the chip is coded, then the key is tested in the ignition. A key with the right blade but the wrong chip code will open the doors and still fail to start the car.
How it works
1. Cut the key blade
The blade is cut to match the locks of the car, either from a working key or from the key code.
2. Code the chip
The technician connects to the car through the diagnostic port and writes the new chip code into the immobiliser memory.
3. Pair the remote
If the key has remote locking buttons, the remote is paired at the same visit, so the buttons work as well as the chip.
4. Start the car
The engine is started with the new key, and the key is tested more than once before the technician leaves.
What you need
- V5C logbook showing you own the car
- Photo ID
- The car itself
- A working key to copy from, if you have one
The documents we need are confirmed on the phone before the visit. [TODO: confirm the exact documents this business requires.]
Frequently asked questions
What is a transponder chip?
A transponder chip is a tiny chip inside the head of a car key. It sends a code to the car when the key is turned, and the immobiliser checks that code before the engine is allowed to start. The chip has no battery of its own. The car powers it when the key is turned.
Can a transponder key be copied without the original?
A new transponder key can be made when the original is lost, because the chip code is written from the car rather than copied from the old key. The car must be present, and proof of ownership is needed first. Call us with the make, model and year, and we will explain the process for your car.
Why does my copied key open the doors but not start the car?
The blade of the copied key fits the locks, so the doors open, but the chip inside has not been programmed to the immobiliser. The car checks the chip code before the engine starts, and an unprogrammed chip is rejected. The key needs to be programmed to the car, not just cut to fit.
Related services
Lost your car keys? Call now.
Open 24 hours — mobile car key fob programming at your car in Birmingham, West Midlands, UK. No towing, no dealer visit.