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US regulators expand number of vehicles affected by Takata recalls

U.S. safety regulators on Wednesday expanded the number of vehicles in the United States that may be affected by recalls for potentially defective Takata Corp. air bags that could spray shrapnel at occupants.

The U.S. National Highway Traffic Safety Administration (NHTSA) said in a statement the number of vehicles from 10 automakers covered by recalls this year and in 2013 is now 7.8 million, up 28 percent from the 6.1 million announced on Tuesday. The NHTSA said the new number corrected the vehicle list provided in prior safety bulletins this week, adding some vehicles and excluding others from previous bulletins.

Read MoreToyota recalls 247K vehicles for airbag rupture risk

The NHTSA has urged owners of certain Toyota, Honda, Mazda, BMW, Nissan, Mitsubishi, Subaru, Chrysler, Ford, and General Motors vehicles to replace installed air bags as soon as possible.

In the expanded bulletin, Honda accounts for almost 5.1 million of the vehicles, Toyota 877,000 vehicles, Nissan almost 695,000 vehicles, BMW nearly 628,000 vehicles and Chrysler more than 371,000 vehicles.

Read MoreGM: Don't not to let passengers ride in front seat of faulty air bag cars

The U.S. safety agency is investigating whether Takata air bag inflators made between 2000 and 2007 were improperly sealed. Bags inflating with too much force could potentially spray metal shrapnel at occupants. They have been linked to four deaths and resulted in several lawsuits.

The probe has focused on inflators recovered from cars being recalled for repairs in hot and humid places like Florida. Takata is cooperating with that investigation along with 10 automakers.

More than 16 million vehicles globally have been recalled because of defective Takata air bags since 2008.

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Vehicles affected by the recall

BMW:627,615 total number of potentially affected vehicles

2000 – 2005 3 Series Sedan
2000 – 2006 3 Series Coupe
2000 – 2005 3 Series Sports Wagon
2000 – 2006 3 Series Convertible
2001 – 2006 M3 Coupe
2001 – 2006 M3 Convertible

Chrysler: 371,309 total number of potentially affected vehicles

2003 – 2008 Dodge Ram 1500
2005 – 2008 Dodge Ram 2500
2006 – 2008 Dodge Ram 3500
2006 – 2008 Dodge Ram 4500
2008 – Dodge Ram 5500
2005 – 2008 Dodge Durango
2005 – 2008 Dodge Dakota
2005 – 2008 Chrysler 300
2007 – 2008 Chrysler Aspen

Ford: 58,669 total number of potentially affected vehicles

2004 – Ranger
2005 – 2006 GT
2005 – 2007 Mustang

General Motors: undetermined total number of potentially affectedvehicles

2003 – 2005 Pontiac Vibe
2005 – Saab 9-2X

Honda: 5,051,364 total number of potentially affected vehicles

2001 – 2007 Honda Accord
2001 – 2005 Honda Civic
2002 – 2006 Honda CR-V
2003 – 2011 Honda Element
2002 – 2004 Honda Odyssey
2003 – 2007 Honda Pilot
2006 – Honda Ridgeline
2003 – 2006 Acura MDX
2002 – 2003 Acura TL/CL
2005 – Acura RL

Mazda: 64,872 total number of potentially affected vehicles

2003 – 2007 Mazda6
2006 – 2007 MazdaSpeed6
2004 – 2008 Mazda RX-8
2004 – 2005 MPV
2004 – B-SeriesTruck

Mitsubishi: 11,985 total number of potentially affected vehicles

2004 – 2005 Lancer
2006 – 2007 Raider

Nissan: 694,626 total number of potentially affected vehicles

2001 – 2003 Nissan Maxima
2001 – 2004 Nissan Pathfinder
2002 – 2004 Nissan Sentra
2001 – 2004 Infiniti I30/I35
2002 – 2003 Infiniti QX4
2003 – 2005 Infiniti FX35/FX45

Subaru: 17,516 total number of potentially affected vehicles

2003 – 2005 Baja
2003 – 2005 Legacy
2003 – 2005 Outback
2003 – 2005 Baja
2004 – 2005 Impreza

Toyota: 877,000 total number of potentially affectedvehicles

2002 – 2005 Lexus SC
2002 – 2005 Toyota Corolla
2003 – 2005 Toyota Corolla Matrix
2002 – 2005 Toyota Sequoia
2003 – 2005 Toyota Tundra

CNBC contributed to this report.