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
Autonomous Vehicles will Create a Radical Paradigm Shift in Vehicle Design

By Mike Antich
My prediction is that autonomous vehicles will create a paradigm shift in vehicle design, whereby interior design will become the primary brand differentiator in the future. What will drive this paradigm shift is that future autonomous vehicle design will focus primarily on the passenger and not the driver. This will create a tectonic shift in vehicle design with ramifications that will take decades to fully play out.

Fleet Strategies to Improve OTD for Upfit Units

By Mike Antich

View All

Driving Notes

Chris Wolski
2017 Chevrolet Silverado 2500 HD

By Chris Wolski
During the lead up to the September opening of the State Fair of Texas, I was given the chance to take a preview spin in the 2017 Chevrolet Silverado 2500 HD. It whet my appetite for more.

2017 Volkswagen Passat R-Line

By Thi Dao

View All

Nobody Asked Me, But...

Sherb Brown
Focusing on the Vehicle Delivery Process

By Sherb Brown
The fleet industry is evolving at an ever-increasing pace, but the one area that hasn’t evolved and never seems to improve is the actual vehicle delivery process. It would seem to be the easiest part of the whole business, but it is the one area that everyone struggles with.

Game-Planning for the Fleet Technology Expo

By Sherb Brown

View All

Data Points

Dylan Brown
Does Telematics Branding Translate to Adoption?

By Dylan Brown
We asked over 750 fleet professionals questions about the prevalence of each provider in the market and their brand recognition.

How Fleet Size Dictates Telematics Needs

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