The results of a NASA study suggest faulty electronics were not to blame for the unintended acceleration in Toyota vehicles that caused the company to recall nearly 8 million U.S. cars last year.

In March 2010, at the time of the recall, Toyota was unsure of the cause behind a spate of cars that would speed up without the driver’s help. The Toyota problem was linked to at least 50 reported fatalities, according to the National Highway Traffic Safety Administration (NHTSA).

Eventually, the NHTSA identified two mechanical defects behind the malfunction: sticking accelerator pedals and a design flaw that caused the pedals to become trapped by floor mats. However, the agency asked NASA engineers with expertise in electronic and software systems to look into consumer claims that electronic systems may have played a role. The results of the NASA study were announced Feb. 8.

“NASA found no evidence that a malfunction in electronics caused large unintended accelerations,” Michael Kirsch, principal engineer and team leader of the NASA study, said in a statement.

The NASA personnel were called on not only for their technological know-how, but for their experience in probing into the root cause of a problem. The study was led out of the agency’s NASA Engineering and Safety Center at Langley Research Center in Hampton, Va., established in the wake of the 2003 Space Shuttle Columbia accident.

The NASA team examined computer-controlled electronic systems, electromagnetic interference and software to assess whether any of these systems played a part in causing the cars to accidentally accelerate.

“We enlisted the best and brightest engineers to study Toyota’s electronics systems, and the verdict is in,” U.S. Transportation Secretary Ray LaHood said.

The NASA Engineering and Safety Center has conducted about 400 independent technical assessments. More recently, the team helped out during the 2010 Chilean mining accident, suggesting design requirements for a system to rescue the 33 trapped miners.