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Suzuki Says Improper Mileage Tests Used on 2.1 Million Cars

  • Automaker reviewed testing methods of 16 models now on sale
  • Testing didn’t follow protocol due to concerns about weather
Updated on

Suzuki Motor Corp. said it used fuel-economy testing methods that weren’t compliant with Japan regulations on about 2.1 million vehicles sold locally, making it the second automaker in the country to admit having conducted improper checks.

Suzuki said it won’t need to revise the ratings, as proper testing showed earlier results were within an acceptable range of deviation. The automaker said it used a tunnel to test the fuel efficiency of its vehicles out of concern about wind at its Sagara proving grounds, located on a hill near Japan’s southern coast. All 16 of its models currently on sale locally were reviewed, and the issues don’t apply to products sold overseas, it said.