U.S. safety regulators have closed an investigation into steering problems in more than 500,000 Ford full-size cars without seeking a recall.
Mazda is recalling nearly 100,000 midsize cars in the U.S. to fix a problem with the tire pressure monitoring system.
Ford said Friday that its new aluminum-bodied F-150 pickup will get up to 26 mpg on the highway, making it the most fuel efficient gas-powered full-size pickup.
The lawsuit seeks potentially billions of dollars in fines.
Takata Corp. insists that current recalls covering 8 million U.S. cars in high-humidity areas are sufficient. But the National Highway Traffic Safety Administration wants millions more added to the recalls.
The move is likely to give more ammunition to lawmakers who are calling for a nationwide recall of cars with air bags made by Japanese parts supplier Takata.
An employee said that a machine used in the production process was malfunctioning, potentially contaminating the food with metal shavings.
The National Highway Traffic Safety Administration says Honda may have failed to report incidents related to Takata air bags as well as other defective parts.
U.S. safety regulators are ordering Japanese auto supplier Takata Corp. to provide more information about air bags that can explode and shoot shrapnel toward drivers and passengers.
Takata, the world’s second-largest air bag maker with 22 percent of the market, has been plagued by problems for the past 13 years.