Hi
This isn't a problem at all, if you have the two-button radio-fob. With all the car doors (and bonnet) closed, press the radio-fob "Lock" (left-hand) button FOUR times quickly to re-synchronise. I can't remember whether it's required that the doors have been un- or locked with the key first, so try both. The car immobiliser is programmed at the factory to complement own its radio-fobs, battery disconnection doesn't change this; so if they ever worked, they CAN AGAIN with this technique.
If you've never had the radio-fobs, you're more seriously stuffed. You'll have to go along to an ex-Rover dealer with proof of your ownership (V5c, bill of sale, insurance certificate etc) and buy new fobs and pay for programming the fobs and the immobiliser to match. While they're busy looking-up the codes associated with your car, ask them to also supply you with: the key-cut code, radio code and immobiliser code. Ex-Rover dealers are frequently now XPart Service Centres, find them at www.xpartautoservicecentre.com
First rule of buying a Rover: Get two genuine keys and working fobs (test them), the key-cut code, radio code and immobiliser code. These are often written in the spaces for them on detachable cards on the inside back cover of the Owner's Handbook.
StoppingService, November 2007
