2019 Audi A6

A warning message appeared that there is an electrical system problem. I arranged to bring to dealer for service the next day. While driving to dealer, multiple malfunction messages appeared on dashboard. Eventually all displays went black and shortly thereafter the engine stopped. I rolled to a stop. Car was dead. Audi stated it needs a replacement starter/generator. Very dangerous as it happened to me on an interstate. My research shows that this is a not uncommon problem.

While driving on an interstate highway, an electrical fault warning appeared. 5 minutes later, a series of warnings appeared pertaining to a whole host of Audi systems, and I suddenly lost power to the car. I coasted off the highway to the shoulder, where the car died. I was told by the dealership that the issue is a generator, and that it's a common issue affecting A6s. It was truly disconcerting to lose power, without much warning, when driving.

The electrical system failed while driving at highway speeds on the interstate. Car lost power, all safety systems shutdown and I had to navigate the car while coasting off the road. Car would no longer start and left me stranded on the side of the interstate for 2hrs. I have since learned from the audi service department that the 48V generator had failed and caused this situation.

While out of town the car gave an electrical system fault with a yellow warning saying find a dealr soon. Then shortly after the warning went red and while driving all systems in the car started to shut down. Steering, transmission, throttle, dash, everything went crazy. Need to to cross 2 lanes of traffic to get off main road where there was no shoulder to pull onto a side road, very scary without power steering and the transmission putting itself into neutral. Easily could have caused an accident with my wife and 2 kids in yhe car. At that point the car was dead.

Multiple warnings indicating to contact dealer (Lane departure, adaptive cruise control, collision avoidance, etc) then 1 minute later transmission failure and engine failure imminent.... pull over immediately and contact dealer. I turned into a road off main highway within a minute of the last two warnings and as I turned, my center MMI went blank then my electronic dash went blank, transmission went into neutral and the engine died all within a few seconds. Fortunately I was able to coast to a stop in the parking lot. Flatbed towed to dealer who stated most likely the generator between the lithium battery bank and gas engine failed. They have seen several in this year for A6 and A7's with mild hybrid engines. I'm lucky to be in low volume traffic as there was no power to indicate to drivers around me that my engine quit and not even turn signals worked.

THIS VEHICLE SUFFERS FROM A SOMETIMES DANGEROUS ACCELERATION LAG. THE TIME IT TAKE BETWEEN PRESSING THE GAS PEDAL AND THE TIME THE CAR STARTS TO MOVE IS EXCESSIVE AND IN CERTAIN SITUATIONS, DANGEROUS. IT'S ESPECIALLY EVIDENT IN CONDITIONS WHERE YOU'RE TRYING TO ACCELERATE FROM A LOW RPM SPEED (SLOW TRAFFIC, "CALIFORNIA" STOP, ETC) TO JOIN FASTER TRAFFIC OR MERGE IN. A PERFECT EXAMPLE IS TRYING TO GO FROM A SLOW MOVING HIGHWAY LANE TO A FASTER ONE. YOU PICK YOUR SPOT, THEN GO FOR IT. THE CAR SITS FOR 1-2 SECONDS...THEN IT GOES. THE FIRST FEW TIMES IT HAPPENED IT WAS DANGEROUS. I HAVE HAD TO ADJUST MY DRIVING TO MAKE SURE I DO NOT END UP IN A SITUATION WHERE A STANDARD THROTTLE RESPONSE WOULD BE REQUIRED. ADDITIONAL EXAMPLES OF CIRCUMSTANCES WHERE THE LAG CAN CAUSE THE DRIVER TO INADVERTENTLY ENTER INTO AN UNSAFE SITUATION: -TURNING LEFT ACROSS TRAFFIC - IN-TOWN MERGE OR LANE CHANGE - TURNING RIGHT TO JOIN FASTER TRAFFIC

AT A STOP LIGHT THE ENGINE WILL SHUT OFF COMPLETELY REQUIRING YOU TO RESTART THE CAR. THIS HAPPENS INTERMITTENTLY AND HAPPENS WHEN THE AUTO ON/OFF IS ON OR OFF. LEADS TO DANGEROUS SITUATIONS WHEN IN CITY TRAFFIC OR STOPPED AT A RED LIGHT ON HIGHWAY. TWO TRIPS TO AUDI AND THERE ARE NO ERROR CODES ON THE ENGINE TO DIAGNOSE THE ISSUE. MAKES FOR VERY NERVOUS DRIVING WHEN EVERY STOP LIGHT MAY CAUSE YOUR CAR TO STALL. MOST RECENT ISSUE THE CAR WOULD RE-START AND IMMEDIATELY STALL, AND THEN STARTED SHAKING VIOLENTLY. *TR

I ACQUIRED THIS CAR (2.0T) TWO NIGHTS AGO AND ON THREE OCCASIONS (SO FAR) THE ENGINE COMPLETELY STALLS WHEN THE CAR COMES TO A STOP. NOT THE TYPICAL AUTO ON/OFF FEATURE FUNCTION. I HAVE TO RESTART THE IGNITION AND PUT THE CAR IN DRIVE AGAIN. ONCE, EVEN IN THE MIDDLE OF RUSH HOUR TRAFFIC. SO FAR, THE ONLY CONSISTENT SCENARIO IS WHEN I AM ON THE SECOND LEG OF A TRIP. FOR EXAMPLE, I GET IN THE CAR AT MY OFFICE, DRIVE TO A STORE OR DAYCARE. GET BACK IN THE CAR, START UP, DRIVE A COUPLE OF MILES AND THE CAR SHUTS DOWN AT A COMPLETE STOP. VERY UNNERVING ON A BRAND NEW CAR WITH LESS THAN 200 MILES ON IT. I'VE LOOKED ACROSS THE INTERNET AND IT SEEMS TO BE QUITE A WIDESPREAD ISSUE FOR VW AND AUDI DRIVERS OF RECENT MODEL CARS. THIS IS A SAFETY CONCERN AND NEEDS TO BE ADDRESSED.

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.

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.