Can you just change a ignition barrel in a corsa c 1.2 with out changing everything else?

Yes, you can change the ignition barrel in a Corsa C 1.2 without replacing everything else. The ignition barrel can typically be removed and replaced independently, provided you have the right tools and follow the correct procedure. However, it's important to ensure that the new barrel is compatible with your existing key and immobilizer system to avoid issues with starting the vehicle. Always consult the vehicle's manual or a professional for guidance if you're unsure.