The U.S. Department of Transportation is urging vehicle owners in several states with defective Takata airbags to seek repairs immediately.

The agency singled out Ford Rangers and Mazda B-Series trucks from 2006, which are under a "do not drive" warning.

RELATED: Will your car show up on updated Takata recall list?

Here are the key locations of the agency's focus:

• Atlanta
• Austin, Texas
• Boston
• Chicago
• Dallas-Fort Worth, Texas
• Houston-Galveston, Texas
• Knoxville, Tennessee
• Los Angeles
• Miami-Fort Lauderdale-Hollywood, Florida
• New York
• Philadelphia
• Phoenix
• Portland, Oregon
• Puerto Rico
• Riverside-San Bernardino, California
• San Antonio, Texas
• San Diego
• San Francisco
• Washington D.C.
• West Palm Beach-Boca Raton, Florida
• Wilmington, Delaware

RELATED: Are there more airbag injuries than being reported?

For more information about the recall from the National Highway Traffic Safety Administration, click here.