Every Vauxhall built in the last two decades contains an electronic immobiliser—a factory-fitted anti-theft device that prevents the engine from starting unless the correct transponder chip is present in the ignition key. The immobiliser control unit stores the vehicle's unique security code, and when you insert your key, the system checks that the key's chip matches this code. Without the correct security code, programming a new or replacement key is impossible.
You will need your V5C logbook (registration document) and a form of photo ID. Dealerships will not release security data without checking this to prevent vehicle theft. vauxhall security code from vin link
To avoid scams and ensure you receive the correct working code, follow these verified methods. Method 1: The Official Dealership Route (Recommended) Every Vauxhall built in the last two decades