There are numerous ways to harden circuitry against radiation The amount of radiation a car is exposed to is orders of magnitude lower than that of an airliner at cruising altitude which is further orders of magnitude lower than that of a spacecraft both of which rely on far more and far more complex electronics than cars Triple redundancy may be prudent in those applications but it seems a little overkill in this situation to me I m going to reword that part so it doesn t prescribe a specific solution without anything to back it up