Your faulty unit will need to be posted in to us for remanufacture, The work will take between 4 - 5 days to complete, then your unit will be sent back by Special delivery ready to be fitted back on to the car, no programming work is needed by the dealer just plug in and go - very simple DIY fitting. You can be assured of the very high quality of our work These units can cost over £800.00 from Dealer. We are currently remanufacturing them with a 2 year unlimited mileage