John Howard Nissan

As news breaks over possible radioactive contamination from Japan's severely compromised Fukushima Dai-ichi nuclear power plant, automakers have been trying to reassure car buyers that their vehicles will remain unaffected. The most common assurance offered is that autos are manufactured far enough away from the facility that fallout won't end up on their vehicles.

Nissan is offering consumers more than just words. The Japanese automaker will reportedly be performing a radiation inspection on all vehicles produced in Japan, before they are exported to other countries. And they will continue to do so until any possible threat of contamination…