The National Highway Traffic Safety Administration has opened a probe into reports of intermittent brake failure in the 2007 and 2008 Toyota Camry hybrid sedan.
Dozens of consumers have complained to the agency about the problem, asking it to force Toyota Motor Corp. to recall the cars. Toyota has previously paid record federal fines for not recalling vehicles promptly.
The agency said Monday that it would look into reports of delayed braking and brake failure from owners of the vehicle. The problem could affect up to 30,000 cars. NHTSA said it has had 59 complaints, including two reported accidents. Safety regulators said that about 40 percent of the braking incidents occurred at speeds of 40 miles per hour.