Case Initial Text 1

Do you own a 2017-2020 Audi?

Your car may have a dangerous defect in the Start/Stop system affecting power steering, brakes and acceleration. You may be entitled to reimbursement. Find out your rights »

Case Status
U.S. District Court for the Eastern District of Virginia
Case Number
Volkswagen Group of America Inc., Audi AG
File Date


All 2017 - 2020 Audi models, except electric and hybrid, including:

  • 2017 - 2020 Audi A3
  • 2017 - 2020 Audi A4
  • 2017 - 2020 Audi A5
  • 2017 - 2020 Audi A6
  • 2017 - 2020 Audi A7
  • 2017 - 2020 Audi A8
  • 2017 - 2020 Audi Q3
  • 2017 - 2020 Audi Q5
  • 2017 - 2020 Audi Q7
  • 2017 - 2020 Audi Q8
  • 2017 - 2020 Audi S3
  • 2017 - 2020 Audi S4
  • 2017 - 2020 Audi S5
  • 2017 - 2020 Audi S6
  • 2017 - 2020 Audi S8
  • 2017 - 2020 Audi SQ5
  • 2017 - 2020 Audi TT
  • 2017 - 2020 Audi TT S


Hagens Berman is investigating a hazardous defect affecting tens of thousands of Audi vehicles that reportedly prematurely depowers the vehicle's power assisted steering and brakes when slowing to a stop and causes delay in those systems and in acceleration when restarting from a stop, leading to high risk of accident and injury. The defect is believed to stem from the vehicles' auto stop/start system, which appears to engage too early and disengage too lateOwners have reported the defect manifesting in nearly all new Audi models other than hybrids and all-electric.

Owners report that the defect shuts down the engine before they have come to a complete stop, which drastically increases the force required to turn the steering wheel and the pedal force required to completely stop the vehicle. After the vehicle is stopped, owners report that the defect creates a delay between when their foot is removed from the brake and when the engine to turn back on. During this delay, the driver can't move the steering wheel or accelerate. When the engine finally does turn back on, drivers report that the car lurches forward, rather than accelerating gradually.

When the defect manifests, owner complaints in online forums indicate that affected vehicles flash a code for a “start/stop” malfunction.

A service bulletin has been issued regarding a similar start/stop defect for 2013 - 2016 Audis. Dozens of reports to the National Highway Traffic Safety Administration (NHTSA) document the start/stop defect, both indicating that Audi has likely been made aware of the widespread issue.


Audi owners have detailed instances of the start/stop defect, brake failure and near crashes in reports to the NHTSA:

  • "It is will not respond after a few seconds. ...suddenly the car will surge ahead. This is not an isolated incident..."
  • "Engine shuts off when car is in drive or reverse while vehicle is in motion and displays message of "start/stop"  system deactivated. Please restart engine manually." ...The dealerships have no answers for the first part, but claim a bug on the sensors caused the car to clam on its brakes."
  • "I almost got hit because of this and it is very scary not to be able to steer out of the way when necessary!!! This is horrible function of the car which can cause a lot of accidents!!"
  • "When the car is running and the transmission is in D/S and the start/stop engine button is pressed to turn off the engine, the transmission is left in neutral and the car can roll unimpeded."
  • "...vehicle feels like the brakes have been artificially and aggressively applied to bring the car to a complete stop before the start/stop engine feature otherwise should have engaged. ...For vehicles following close behind, the effect will be that the Audi vehicle in front of them will appear to lurch to a stop, thus creating a risk of rear-end collision."
  • "This is a major design defect in the auto start/stop system and occurs every time the system is active."
  • "I got my Q8 2 months ago. I tried to learn how to predict acceleration from a standstill, but gave up after almost getting into an accident while changing lanes around a car at a red light. I took it to the dealer who says Audi has not issued any service bulletins to resolve this issue..."
  • "Accelerator response is very inconsistent such that you can't count on the car accelerating in a consistent manner."


Hagens Berman believes vehicle owners deserve more, and that Audi should be held accountable for selling a defective product for which owners paid a premium price. While Audi would rather wait until they are forced to act, we think those affected by this defect should receive immediate help.


Hagens Berman is one of the most successful auto litigation law firms in the U.S. The firm has achieved many of the largest settlements in automotive class-action lawsuits on behalf of vehicle owners, including the largest automotive settlement in history against Audi and Volkswagen – $14.7 billion for emissions cheating. Your claim will be handled by attorneys experienced in automotive consumer law.


There is no out-of-pocket cost or fee to join this case. In the event Hagens Berman or any other firm obtains a settlement that provides benefits to class members, the court will determine and award reasonable fees and costs to the class’s legal team.

Case Timeline
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