It's unlikely that your insurer will not total loss the vehicle as they have no idea what has been damaged whilst in the hands of the criminals. I would ask them to place, in writing, that they agree to cover any possible mechanical defect to all of the running gear, engine, gearbox and electronics - as well as wear and tear to all components of the vehicle. They categorically will not want to write and agree to that, as such you may well find the vehicle will be made a total loss very quickly. Advise them that you will contact them for every single thing that fails and request it be replaced over the time you own the vehicle, as it may have failed as a result of the theft.