If your Astra(F or G) or Vectra (B) remote stops working its normally one of two things wrong. Battery low or its gone out of sync with the car, worse case of course it couold just be buggered but thats rare as they are pretty robust.
If your Astra(F or G) or Vectra (B) remote stops working its normally one of two things wrong. Battery low or its gone out of sync with the car, worse case of course it couold just be buggered but thats rare as they are pretty robust.