The NHTSA is looking into the Honda Pilot and Toyota RAV4 for potential safety defects.

The National Highway Traffic Safety Administration has launched two separate safety investigations involving the Honda Pilot and Toyota RAV4. In all the two probes cover more than 600,000 vehicles.

The NHTSA officially launched an investigation of the 2005 Honda Pilot on Friday after receiving 35 complaints about the SUV's steering and braking systems. In one of those complaints a Pilot owner alleged that the vehicle "screeched to an unexpected full stop in the middle of an intersection halfway thru a turn."

The first incident involving the 2005 Honda Pilot was reported to the NHTSA in 2006, according to Automotive News. The NHTSA's investigation of the Pilot includes 142,000 vehicles.

In a much farther-reaching investigation, the NHTSA is probing some 460,000 Toyota RAV4s for a possible fault with the SUV's rear tie rods. The NHTSA has received seven complaints of rusty rear tie rods in RAV4s from the 2006-08 model years, including four complaints alleging the units failed at speeds over 35mph.

Toyota says it has yet to receive a report from the NHTSA but the automaker plans to "fully cooperate with its investigation."