Q: Can i change a door barrel lock on a rover streetwise as key fob shell is broken

You don’t say what year or model your Rover is, so it’s difficult for me to be very helpful. On some vehicles, there is a separate emergency key that pops out of the key fob and can be used to unlock the doors manually. If your vehicle has this option, you’ll be able to get in and out without the key fob. However, the best route for a permanent fix is to replace the fob and have it programmed to the vehicle. A professional with an OEM capable scan tool can do this for you.