DETROIT (CBS/AP) — The U.S. government is now urging owners of nearly 8 million cars and trucks to have the air bags repaired because of potential danger to drivers and passengers. But the effort is being complicated by confusing information and a malfunctioning website.

The government’s auto safety agency says that inflator mechanisms in the air bags can rupture, causing metal fragments to fly out when the bags are deployed. The inflators are made by Japanese parts supplier Takata Corp.

NHTSA RECALL: Full Background
RECALL LOOKUP: Check If Your Car Has Been Recalled Using VIN Number

Safety advocates say at least four people have died from the problem, which they claim could affect more than 20 million cars nationwide. On Wednesday, the National Highway Traffic Safety Administration added 3.1 million vehicles to an initial warning covering 4.7 million cars and SUVs.

Car owners might have difficulty determining if their vehicle is equipped with the potentially dangerous air bags. The warning covers certain models made by BMW, Chrysler, Ford, General Motors, Mazda, Honda, Mitsubishi, Nissan, Subaru and Toyota.

Most of the 7.8 million vehicles are subject to existing recalls during the past two years. But manufacturers have limited many of the recalls to high-humidity areas, excluding cars and trucks in states to the north. NHTSA says owners in Florida, Puerto Rico, Guam, Saipan, American Samoa, the U.S. Virgin Islands, Hawaii and “limited areas near the Gulf of Mexico in Texas, Alabama, Mississippi, Georgia, and Louisiana” should pay special attention to the warning.

Worse yet, the regulatory agency has twice corrected the number of vehicles affected and acknowledged that a list it released Monday wasn’t completely accurate. The agency urged people to use its website to see if their cars are affected — but a feature allowing people to check for recalls by vehicle identification number malfunctioned Monday night and still wasn’t working late Wednesday.

Here is the list of vehicles released Wednesday by the National Highway Traffic Safety Administration. Owners can also check if their car has been recalled using the VIN Number Search Tool.

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

Honda: 5,051,364 total number of potentially affected vehicles
2001 – 2007 Honda Accord)
2001 – 2002 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-Series Truck

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
2004 – 2005 Impreza

Toyota: 877,000 total number of potentially affected vehicles
2002 – 2005 Lexus SC
2002 – 2005 Toyota Corolla
2003 – 2005 Toyota Corolla Matrix
2002 – 2005 Toyota Sequoia
2003 – 2005 Toyota Tundra

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