US governments auto safety regulator on Friday said it opened an investigation into around 115,000 Tesla vehicles over a front suspension safety issue.

Under scrutiny are the 2015 to 2017 model s and the 2016 to 2017 Model X vehicles.

The National Highway Traffic Safety Administration, or N H T S A said it received 43 complaints alleging failure of the left or right front suspension for links.

The agency said three of the complaints were at highway speeds reported within the last three months.

Tesla's did not immediately respond to a request for comments.

According to the N.

H T S A.

Tesla in February of 2017 issued a service bulletin that said some vehicles have quotes front four lengths that may not meet Tesla strength specifications.

But in a block post in June 2016, the electric carmaker denied any safety defect in Model X or model as suspensions.

It did mention, however, that the N H T S A had asked the company to informally provided with information about the suspensions.