In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Nissan is recalling about 1 million late model cars — including its popular Altima and Sentra sedans — because a software glitch can prevent the front passenger air bag from deploying in an accident. 
  
 The recall includes the Nissan Altima, Leaf, Pathfinder, and Sentra from 2013 and 2014 model years. Also recalled are the 2013 Nissan NV200 and Infiniti JX35 and 2014 Infiniti Q50 and QX60 vehicles. 
  
 The automaker said a sensor in the recalled vehicles doesn’t always detect when the front passenger seat is occupied and in some instances doesn't activate the air bag. 
  
 Nissan knows of a handful of accidents where this has occurred. It said there have been no fatalities but that it doesn't know if the problem is linked to any injuries. 
  
 The problem started to crop up about a year ago, according to documents filed with the National Highway Traffic Safety Administration. NHTSA informed Nissan of several complaints, and the automaker looked into the issue. 
  
 During its investigation Nissan looked at a crash where the car’s air bag status light was off and the vehicle’s electronic data record showed that sensors believed the seat was empty. But reports from the scene said there was a passenger in the seat at the time of the accident. 
  
 Over the next year Nissan found several more crashes where car sensors incorrectly judged that the front seat was not occupied. 
  
 Nissan traced the problem to software in the vehicles, which it will now fix for owners. 
  
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 Follow me on Twitter (@LATimesJerry), Facebook and Google+. ||||| 2013 Nissan Sentra. (Photo: Nissan via Wieck) 
  
 Nissan is recalling 1 million vehicles because the air bag system software might not be able to tell whether there is a person sitting in the front passenger seat, so the air bag might not inflate in a crash. 
  
 It's the second passenger air bag recall for some of the vehicles. Last April, 82,038 2013-model vehicles from the same group were recalled because a sensor was improperly manufactured and might prevent the passenger bag from working in a crash. 
  
 Nissan noted in documents on file with the National Highway Traffic Safety Administration that there have been accidents, but no injuries or deaths were specified. 
  
 The recent action involves what's called the occupant classification system, which judges whether anyone is sitting in the passenger's seat in order to decide whether to inflate the bag if there is a crash. 
  
 Nissan documents say the system might not work if there is "high engine vibration at idle when the seat is initially empty and then becomes occupied, or unusual occupant seating postures immediately upon being seated." 
  
 Dealers will reprogram the system at no charge. 
  
 The latest action involves 989,701 Nissan and Infiniti brand vehicles, including some of the automaker's best sellers: 
  
 2013-2014 Nissan Altima (544,139) 
  
 2013-2014 Leaf electric (29,165) 
  
 2013-2014 Nissan Pathfinder (124,202) 
  
 2013-2014 Nissan Sentra (182,569) 
  
 2013 NV200/Taxi (6,696) 
  
 2013 Infiniti JX35/ 2014 QX60 (63,698) 
  
 2014 Infiniti Q50 (unspecified) 
  
 Nissan provided a detailed chronology indicating that it has been investigating reports of the problem since last spring, conducted a recall for a different problem then, but continued to see warranty claims. It began investigating anew last August, is aware of two incidents and has determined the latest issue as software requiring a recall. 
  
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A: 
Nissan is calling back about a million of its 2013 and 2014 vehicles: Thanks to a software issue, the passenger airbag may not expand during an accident. The problem is related to the car not recognizing that there is a passenger in the seat, the Los Angeles Times explains. Affected models are the Altima, Sentra, Leaf, Pathfinder, and NV200, as well as the Infiniti JX35, Q50, and QX60. The company is aware of accidents but no fatalities tied to the issue. Some of the same batch of vehicles were recalled last year, also due to passenger air bag problems, USA Today notes. The news comes as GM and Toyota are embroiled in safety concerns of their own.