Thats what happens when your engineering base is based on reverse engineering rather than conceptualising and designing from the ground up. You end up lacking the engineering knowledge to get things right.

Hence why they snapped up the assets of rover - a complete package of cars to rebody suitable for the masses. The rovers were only outdated in the western world.

They have tried to copy western ballistic missile submarine technology and that ended well so paid the russians instead to help them out.