Many of the parts needed to produce cars now, are electronics.  The big electronics suppliers for the automotive industry are still shut down after the 11 March 2011 earthquake and tsunami in Japan.

Renesas Electronics, a maker of semiconductors used to control vehicles, has still not resumed operations.

Hitachi Automotive Systems, does not have full production capacity of electronics parts that control engines.

Another company, which makes parts for brakes and rubber products, suspended operations because their plant is located by the Fukushima Daiichi nuclear power plant.