The Car and Truck Fleet and Leasing Management Magazine

unintended acceleration

Unintended acceleration, or Sudden Unintended Acceleration (SUA) as it is more frequently called, is the unintended or uncontrolled acceleration of a vehicle.  A U.S. National Highway Traffic Safety Administration report (NHTSA) defined SUA as "unintended, unexpected, high-power accelerations from a stationary position or a very low initial speed accompanied by an apparent loss of braking effectiveness."

According to, “Possible factors contributing to SUA are:

  • Pedal misapplication, i.e. pressing the accelerator instead of the brake
  • Unresponsive (entrapped) pedals Electronic throttle control or cruise control failure
  • Stuck throttle (unrelated to pedal position)

In 2009-2010, several Toyota vehicles were recalled and production on certain models was suspended due to a rash of SUA claims. In the mid-1980s, Audi issued a series of recalls of its Audi 5000 models due to reports of SUA related problems.



Comment On This Item

Comment: (Maximum 10000 characters)  
Leave this field empty:
* Please note that comments may be moderated.


Market Trends

Mike Antich
Upward Pressure on Fleet Costs Threatens to Increase TCO

By Mike Antich
Recently, I conducted a survey of several hundred fleet managers to identify emerging industry trends. One recurrent theme expressed by fleet managers was the concern that fleet costs are starting to experience upward pricing pressures. Here's what they told me.

How to Minimize Unauthorized Use of Corporate Assets

By Mike Antich

View All

Driving Notes

Paul Clinton
2018 Volkswagen Tiguan

By Paul Clinton
The 2018 Volkswagen Tiguan arrives as a longer, beefy compact SUV that it will to sell alongside the existing (now Tiguan Limited) model.

2018 Mercedes-Benz S450

By Chris Brown

View All

Nobody Asked Me, But...

Sherb Brown
Adapting to a Changing Tide

By Sherb Brown
Fleets are often the beta testers of the vehicle market. That shift away from compact sedans we saw in the fleet market a few years ago is playing out in real time in the retail market right now.

Keep Realistic Fleet Expectations

By Sherb Brown

View All

Data Points

Dylan Brown
What Are the Most Valuable Services Offered by FMCs?

By Dylan Brown
What do fleet managers value in their relationships with fleet management companies? The answer may surprise you.

Demand More From Your Fuel Card Provider

By Dylan Brown

View All

In Memoriam: Coach's Insights

Ed Bobit
Thinking of the Newbies of the Future

By Ed Bobit
A lot has changed in the past 10-15 years, so we can only imagine this momentum will continue into the next decade-plus. How will this change impact the fleet manager of tomorrow?

Managing a Car vs. Work Truck Fleet

By Ed Bobit

View All


More From The World's Largest Fleet Publisher