Nissan Admits to Falsifying Exhaust Emissions and Fuel Economy Data

Jason Siu
by Jason Siu

Nissan has joined a growing list of automakers caught in emissions scandals.

The Japanese automaker admitted earlier this week that it has discovered sample test environments for exhaust emissions and fuel economy at most of its factories in Japan were not accurate. Those tests were conducted during final vehicle inspections, and Nissan says those inspection reports were based on altered measurements. A total of 19 models sold in Japan have improperly measured exhaust emissions and fuel economy, but the falsified data doesn’t apply to vehicles exported overseas. The issue applies to requirements specific to the Japanese market, Nissan said.

This is the second recent major scandal from Nissan, after last October it admitted that for decades, uncertified inspectors had signed off on final checks for vehicles sold in Japan. That resulted in a recall of 1.2-million vehicles.

SEE ALSO: Nissan Rogue Recalls: Is Yours on the List?

Following its initial scandal last year, the company launched voluntary compliance checks and that is how it discovered the falsified emissions and fuel economy data. Nissan said around 2,200 sample tests were performed at six plants, and 1,200 units at five factories showed some form of falsification. The Japanese automaker found vehicle conditions such as driving speeds and durations, as well as external temperatures, were not in line with Japanese regulations. In addition, testing equipment had not been calibrated properly. Mileage data has also been overstated to make the vehicles appear more fuel efficient than they really are.

The company is continuing its investigation, but has initially found tampering began in 2013 and involved 10 employees. It is possible it goes back even further.

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Jason Siu
Jason Siu

Jason Siu began his career in automotive journalism in 2003 with Modified Magazine, a property previously held by VerticalScope. As the West Coast Editor, he played a pivotal role while also extending his expertise to Modified Luxury & Exotics and Modified Mustangs. Beyond his editorial work, Jason authored two notable Cartech books. His tenure at saw him immersed in the daily news cycle, yet his passion for hands-on evaluation led him to focus on testing and product reviews, offering well-rounded recommendations to AutoGuide readers. Currently, as the Content Director for VerticalScope, Jason spearheads the content strategy for an array of online publications, a role that has him at the helm of ensuring quality and consistency across the board.

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  • Jack Woodburn Jack Woodburn on Jul 13, 2018

    Obviously, the penalties for employees and companies have not been severe enough a deterrent to repeated falsification. Time to REALLY hammer people from bottom to top and corporate bottom lines for more than one year...future years of fines equivalent to the number of years falsifying.

  • Noe Japan Noe Japan on Jul 13, 2018

    this is part and parcel though with japanese operations sadly they'll treat this as 'per the norm in japan' and that is to just apologize emphatically with very deep bows etc ........ and in Japan the companies get away with it every time ..... like Takata when the Japanese deal with overseas markets they can't get away with that sh*t and are held liable and responsible as every other global company ...... and then thats where Japan fails each and every time. shame Wonder this blows up bigger than the VW scandal, one hopes it does and again slaps corporate Japan 'in Japan' to wake up .......... and probably again it won't ... bury the head in the sand and wait for it to blow over as usual

    • See 1 previous
    • Noe Japan Noe Japan on Jul 14, 2018

      I live and have started and sold 2 companies in Japan I understand the system here and i know its pitfuls I do not see any of my comment as racist. The bowing is specific to Japan and the deeper bow refers to a more intent apology. You should learn about Japanese business culture And i certainly didn't say it doesn't make good cars did i ? perhaps read and consider other points of view