The National Highway Traffic Safety Administration has officially opened an investigation into an estimated the 2007-'08 Toyota Camry Hybrid sedans due to recent braking issues.

At least 30,000 vehicles are involved in the probe.

At least 59 complaints have been received regarding an "intermittent loss of assisted braking," which essentially means drivers are having a hard time braking their vehicles without warning

The rate of complaints is increasing each week as well, according to Reuters.

"Each complaint alleges multiple incidents of either delayed braking actuation or increased brake pedal effort," the NHTSA said in a notice posted on its Web site.

Two crashes have occurred as a result of the issue, according to the NHTSA. The vehicles were traveling at least 40 mph.

"Approximately 40 percent of the incidents occurred at speeds of 40 mph or more," NHTSA said. "The complaints show an apparent increasing trend, with over 55 percent received within the past eight months."

The NHTSA has not been able to determine the number of injuries suffered as a result of the issue.

"We are cooperating fully with NHTSA in this preliminary evaluation," said John Hanson, a Toyota spokesman, according to Edmunds.

Though safety regulators have opened what is called a "preliminary evaluation," it could eventually result in a recall.

If you own a 2007-08 Camry the only thing you can do right now is wait until the NHTSA has completed their investigation. 

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