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US ends investigation into 2,000,000 Nissan vehicles without seeking recall

The U.S. Auto Safety Agency closed on Wednesday a seven-year old investigation of 2.03 million Nissan Motors vehicles for issues related to rear suspension arm failure, without seeking a vehicle recall.

In 2018, the National Highway Traffic Safety Administration opened an investigation that covered Nissan Altima 2013-2018 and Nissan Maxima 2016-2018 vehicles. This was upgraded to a engineering analysis in 2019.

The investigation examined whether corrosion could cause the lower control arm in the rear suspension system to separate from the chassis, posing a safety risk.

Nissan made a change to the design of the lower control arm in January 2018. This was done to increase the durability. Nissan didn't immediately respond to a request for comment on Wednesday.

NHTSA stated that it had reviewed approximately 1,300 reports on the issue. A small number of complaints indicated they were in near-collisions. One complaint stated that a vehicle had made physical contact with an object by bumping into a trailer hitch on a truck.

The agency stated that "Nissan admits that cracks can develop on control arms that are affected due to normal stress loads and that the salts used for road snow and ice treatments may cause corrosion which accelerates the crack's progression."

The majority of reports were from states in the U.S. salt belt, which are prone to corrosion. Vehicles had traveled an average of over 113,000 miles (181,856 kilometers) when they failed. There have been no reported injuries.

Nissan's 2019 customer satisfaction campaign saw more than 47,000 cars repaired with new parts. Some vehicles also received an extended warranty of up to 10 years.

NHTSA stated that further investigation was not warranted due to the declining trend in reports, Nissan's countermeasures and their extended warranty coverage. (Reporting from Abhinav Paramar in Bengaluru, and David Shepardson at Washington; Editing and proofreading by Shreya Biwas and Marguerita Chy)

(source: Reuters)