There are 3 owner-reported engine complaints for the 2019 Audi A6in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
My water pump failed at 49,000 miles. I have been advised by Audi that it is not covered by the extended warranty for some similar cars.
THIS ISSUE HAPPENS WHEN THE CAR IS STOPPED AND THE AUTO STOP/START FEATURE HAS STOPPED THE ENGINE. MOST COMMONLY AT A STOP LIGHT AT A MAJOR CITY INTERSECTION, WHERE THE LIGHTS ARE LONGER. WHEN THE SYSTEM ATTEMPTS TO RESTART THE ENGINE, IT ROUGH IDLES AND THEN THE DRIVE SYSTEM SHUTS DOWN THE ENGINE, CAUSING YOU TOO LOSE ALL POWER. THIS LEAVES YOU STRANDED, AND RISKS CAUSING SOMEONE TO REAR-END YOUR VEHICLE IF THE LIGHT CHANGES. PUTTING THE CAR IN PARK, TURNING OFF THE IGNITION, AND THEN TURNING THE IGNITION BACK ON RESUMES ENGINE FUNCTION. THIS HAS HAPPENED MULTIPLE TIMES. SO FAR THE SERVICE CENTER HAS BEEN UNABLE TO IDENTIFY THE ROOT CAUSE.
I PURCHASED ANEW AUDI A6 ON SEP 11, 2019. IN THE FIRST 2 WEEKS, FIVE DIFFERENT TIMES, THE "START STOP SYSTEM" FAILED TO WORK PROPERLY. I WOULD BE STOPPED AND WHEN I TRIED TO START AGAIN THE ENGINE WOULD DIE. IN ORDER TO START THE CAR BACK UP, I HAD TO PUT THE CAR IN PARK AND RESTART USING THE START BUTTON. THIS RESULTED IN AN UNSAFE CONDITION. THE FIRST TIME, I WAS ON A STEEP INCLINE AND THE CAR STARTED TO ROLL BACKWARDS. ANOTHER TIME A FIRE TRUCK WAS TRYING TO GET THROUGH ON A TWO LANE ROAD AND I COULD NOT GET THE CAR STARTED BACK UP TO PULL FURTHER OVER ON THE ROAD. THE CAR HAS BEEN TO SERVICE TWICE. THEY COULD NOT FIND THE PROBLEM. THE SERVICE DEPARTMENT KEPT AND DROVE THE CAR BUT THIS START STOP ISSUE DID NOT OCCUR AGAIN. I HAVE BEEN DRIVING THE CAR SOME FOR THE LAST TWO WEEKS AND HAVE NOT HAD THIS PROBLEM OCCUR AGAIN.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on May 4, 2026