You cannot replace just the transponder ring as this is the immobiliser. You would need to buy a reset one and program it to your vehicle or buy a full ecu kit including clocks, bcm, immobiliser, ecu and id40 chips for the keys
Keep an eye out for a used second hand one that's been reset or has the pass code from the donar car with it. They don't go wrong often. £75 is OK for a new one but I'm a tight git lol.
Programming it's straight forward. I can send you a guide to help you.
That's awesome. Thanks. For that! But what do think of the below?I wrote a guide over on the opcomusers site for the Astra G/Zafira A but as it shares the same immobilizer unit as the Corsa C the procedure will be the same.
First thing to do is connect opcom to the car and retreive the MKN, Immobiliser output and VIN from the immobiliser unit(found in programming menu of the immobiliser. You are safe to then remove the old immobilizer unit. You do not need to reset it before removal.
Then fit the new immobiliser and new ID40 chip into the key.
To program the immobiliser you must do the following:-
Connect to the immobiliser by following these steps
Connect opcom to your vehicle and turn ignition on and start the Opcom/Vauxcom program.
Security code>[enter security code for the car]
Program Immobiliser Function> [select “Immobiliser installed”] press ok
Program Immobiliser Output> [select the appropriate system] press ok
Program VIN> [Check to see if its programmed, write it if not] press ok
Program MKN> [Check to see if its programmed, write it if not] press ok
Program Transponder Keys > Follow onscreen instructions
Once you have a successful message you need to clear all codes in ECU, BCM, Instruments and Immobiliser II and exit the program and turn ignition off and disconnect the interface.
The system can then takes up to 10 minutes to arm. Leave the ignition off.
Im going to take the clocks out and check, as it seems strange that this appears.The Corsa c suffers with bad connections on the instrument panel which causes none start. Might be worth checking the connections on the back.
Sounds like the instruments is the issue to me. I've never seen a mileage change like you describe. It sounds like a faulty set of clocks. The instruments are part of the immobiliser on the Corsa c. If the code cannot be read from them during the wake up of the system then the immobiliser will activate. The immobiliser checks for the code in the instruments, ecu and bcm and if they match it will start.
Where are you located.. If your local to Liverpool I've a set of good working clocks you can try that I took out my own car.