The U.S. agency is opening 115,000 Tesla vehicles due to the suspension

The Tesla Model S is at a charging station in Beijing, China.

Meghan Reeder | CNBC

The U.S. National Highway Traffic Safety Administration (NHTSA) said Friday it has launched an investigation into some 115,000 Tesla vehicles due to safety concerns about the first suspension.

The agency said it would open a preliminary assessment for the 2015-2017 S and 2016-2017 X-type vehicles after receiving 43 complaints about failure of the front connectors on the left or right front suspension.

Tesla issued a service bulletin in February 2017 describing the manufacturing conditions that could lead to connection failures with the first suspension, NHTSA said.