You have the factory standing behind the certified pre-owned car, plus you'll be buying a car that the original manufacturer has inspected to ensure that it is worthy of certification. The only downside to certified pre-owned cars is that they are generally more expensive than other used cars.ot all used cars can qualify for certified pre-owned programs, and terms vary from one brand to the next, but any true certified pre-owned program will include at least a 100-point inspection of the car. If problems are found, the factory-trained technicians will fix it or disqualify the car from the program.
hydrogen is flammable yes, but not very. because it is the least dense element it disperses very quickly meaning if it were to leak out of something it would disperse before it could ignite. It also burns very fast and has a higher ignition temperature than gasoline (gasoline is between 228 and 500, hydrogen is 550).
Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. For electric vehicles or equipment, ERG Guide 147 (lithium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. (erg, 2016) Health Hazard