I am new to this forum. Please bear with me.
I still have the original Sigma 3T-EWS alarm Imobiliser. My remote control alarm fobs have stopped woring and am using keys to lock and unlock at the moment. From the guides, it looks like I need new remote fobs. Replacements from main dealers are extremely pricey. I see similar (1 button) Sigma fobs on Ebay. My question is how do I re-program these replacements to work with my car alarm or is this re-programming a main dealer?