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Nissan North America faces investigation over rear suspension control failure

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Nissan North America faces investigation over rear suspension control failure

A department under the National Highway Traffic Safety Administration on Aug. 21 upgraded its investigation into more than two million Nissan Motor Co. Ltd. vehicles to an engineering analysis.

The Office of Defects Investigation, or ODI, launched a preliminary probe into select vehicles manufactured by Nissan North America in December 2018 over an issue with the design of its rear suspension control arm. The unit had received four complaints that the lower spring link of the rear suspension system can be separated from the vehicle chassis and fail, due to corrosion.

"Complainants allege that the failure caused a loss of suspension at the rear of the vehicle and may also affect the alignment of the rear wheel on the affected spring link," the filing in December had said.

In an update to the investigation, the ODI reported it received 87 additional complaints since December 2018. It said Nissan conducted a safety test on its car models created between 2013 to 2018 that share the same rear lower control arm design.

The company found that the control arm failure does not pose "an unreasonable risk to motor vehicle safety" due to "low incident rate, high detectability and low risk of adverse vehicle dynamics."

The ODI reported it will continue to collect and analyze complaint and field data in order to fully assess the matter. It will seek additional information about potential safety consequences of rear control arm failure both from field evidence and through more comprehensive vehicle testing.