Detroit-Nissan will launch a "service campaign" to repair nearly 200,000 Altima mid-size cars, as suspension parts may loosen from the frame due to corrosion.

The event was not recalled, but the National Highway Traffic Safety Administration is continuing to investigate issues involving more than 2 million vehicles.

The event included the 2013 Altimas in 22 U.S. states and Washington, D.C., which used salt to clean roads during the winter. It also covers the 2013 and 2014 Altimas in Canada.

Owners will be notified in the fall to allow their vehicles to enter the lower control arm after the replacement.

Service activities can allow Nissan to avoid recalls, which will make it out of NHTSA monitoring and progress reporting requirements to the government.

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The company said in a statement that it has not found corrosion problems outside of the states where road salt is used. The statement said that according to on-site inspections, cars outside of Yanzhou rarely encounter this problem.

In a document released on Thursday, NHTSA stated that 139 owners have complained to the company and the government. There were no reports of collisions or injuries.

NHTSA started an investigation last year after receiving complaints about possible rupture and failure of parts. The control arm allows the wheels and tires to move up and down on bumps. On Thursday, it expanded its survey to include more than 2 million Altimas from 2013 to 2018.

The agency said that Nissan admitted that the parts may have cracks and that corrosive road salt would make the situation worse. NHTSA stated that these components were redesigned in January 2018 to improve durability.

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The agency said that Nissan has determined that the reported accident rate is 0.003% of the car's. The company told NHTSA that if a component fails, the vehicle can still be controlled. For these reasons, Nissan “believes that failure of the control arm does not pose an unreasonable risk to the safety of motor vehicles,” the agency wrote.

NHTSA said it will continue to collect data, and it or Nissan will conduct more comprehensive tests.

Nissan said that any car owner who thinks his car is performing poorly should give it to the dealer.