(CNN) - Automaker Tesla is denying allegations there are suspension issues with its Model S vehicle.
The National Highway Traffic Safety Administration says it is looking to reports of a flaw in some Tesla vehicles that may cause a driver to lose control of the car.
It's also checking allegations that Tesla is asking owners to sign non-disclosure agreements before the automaker pays for repairs.
In a blog post, Tesla claims there is no widespread issue with the suspension.
The automaker also says its goodwill agreements are to prevent tesla's offers to pay for non-warranty repairs to be used against it as an implied admission of fault.
Tesla says it's also considering alternatives to the signed agreements but did not elaborate.