There have been numerous recalls for my 2013 Audi S6 pertaining to the turbocharged engine. Most recently, over the last 2 weeks I noticed decreasing gas mileage and increasing turbo lag but the car still ran "normally" overall. Then, 1 day ago it made intermittent metallic sounds at startup but then still ran normally. Then, the next day the car had the same startup sounds but then had a rough idle at stoplights. I stopped for gas and the car wouldnt restart at the gas station. It was towed to Audi where the car was diagnosed with catastrophic failure of both turbochargers and quoted approximately $10,000 to fix. Being a 2013 Audi S6 model with 60,000 miles on it, it is outside of Audi's 48 month/50,000 mile warranty. This is known issue for 2013-2016 Audi sedan owners, particularly the 2013 S6. This car was previously owned by someone who had it serviced at Audi dealerships and I have purchased Audi care maintenance packages which I have had performed at their recommended intervals at the dealership for the last 3 years. There has been a technical service bulletin made for this known issue. I had a previous engine tsb that Audi originally had me pay $2300 for to fix, however a year later I received a recall notification and that money was refunded. There was also a previous recall relating to the turbocharged seals and coolant lines. All of these service recalls have been performed. Clearly there is a engineering issue with this model engine.

- Modesto, CA, USA

Vehicle was in motion when it started shaking roughly. The car stalled and wouldn't turn back on. I had it towed home and was able to diagnose seized turbo compressors. Replaced the turbos which fixed the problem but at an enormous cost.

- Ridgefield, WA, USA

I was driving at approx 65mph on the highway when all of a sudden I lost significant engine power in my vehicle. I tried to accelerate and could not so I pulled over and the car immediately stalled and I had to have it towed to the repair shop. The issue is a result of the turbos in my vehicle are damaged. Mechanic said there is a known issue related to a screen that filters the oil that can get clogged overtime and cause oil starvation to the turbos increasing heat and ultimately causing failure. Audi has released a tsb for this fault with updated parts however these issues continue to plague vehicles like mine that have otherwise been taken care of. The repair costs for this could be upwards of $9K all because of a design flaw. Not to mention this could be dangerous if loss of power occurs on the highway which could cause an accident.

- Chapel Hill, NC, USA

Engine experience a sudden loss of power while driving on the highway at highway speeds. This was very scary as I was with my family. I pulled over and engine completely cutoff and failed to turn over. Had to get car towed over 50miles to the Audi dealer where they diagnosed the problem as blown turbos caused by a clogged oil screen which is buried deep in the engine not easily accessible and found out Audi has revised this part a few times car only had 42675K miles and was maintained through there maintenance program.

- Woodhaven, NY, USA

2013 S6 with 64K miles suffered turbo failure while driving. The engine stalled while driving and stopped in the roadway. Numerous restarts were attempted before it finally restarted and allowed for a short drive to get off the roadway. This is not an isolated incident and there are numerous similar failures with the Audi 4.0T engine. Audi is aware of these failures and has issued tsbs that identify the turbo oil supply line filter as the culprit but they have not issued a recall. Had this failure happened on a highway at speed it would have been very dangerous.

- Sanford, NC, USA

Oem turbos fail due to oil starvation, caused by oem oil strainer and pvc valve ( several revisions have been made since cars was produced ) also numerous others have had the same issues

- Pfugerville, TX, USA

Turbo failure

- Columbus, OH, USA

Turbo failure at 62,356 miles. Car has been into dealer for all required maintanence. Turbo failure occurred while driving on the highway with my family for a family gathering. Car went into limp mode and nearly stalled on the highway. I was able to pull off to a safe spot and there was an epc error on the dash. The car would not restart. Towed to dealer, and received a repair quote for more than 10K. I believe there are many other customers facing similar issues and Audi should look into this issue and cover the repairs. There is a tsb out from Audi regarding this. I have contacted Audi of America and waiting for a response from them for goodwill repairs.

- Palmer, PA, USA

Failed turbos causing engine to run rich and stall out at any stops making the car inoperable at low speeds. Many reports of MY2013-2016 Audi S series turbos failing/blowing out. Tsb issued for such issue but no recall. Audi of America replacing with MY2017 turbos that have all new parts numbers since this is a known issue with MY2013-2016 turbos.

- Saratoga, CA, USA

Car suddenly had a "rough idle", I.e. shaking 1-2inches back-and-forth while in idle, after driving for 20 minutes at normal conditions. Shutdown car. Attempted to restart car, but the engine would not turnover the first attempt. Tried again - engine started the second time. No check engine light appeared, so I assumed car was safe to drive. Drove car to dealer for service, and then I noted that the car started making a feint grinding noise when accelerating. Technician noted that both turbochargers had failed, likely due to inadequate oil flow. Car has 60K miles on it, so a catastrophic turbocharger failure this early-on was unexpected and potentially dangerous (car could have stalled due with engine being starved for air), and no check engine light appeared to indicate something was severely wrong with car. This issue appears to be wide-spread based on discussions available in online forums: Https://www.audizine.com/forum/showthread.php/806039-boom-goes-the-turbo

- Plainfield, IL, USA

I put my car in reverse gear and then pressed slightly on the gas pedal. The car didn't move. I checked my hand brake and regular brake. Both were disengaged. So I pressed a little more and more. The engine began to growl like crazy and the car refused to even move. Then all of a sudden the car just launched itself. I nearly hit another car. It was very scary. I switched the car off and then tried again. This time no trouble. Similar thing happened when I was exiting a parking lot. Fired my car up, put my car in "D". pressed on the gas pedal. Car wouldn't move. Pressed more and more, nothing !! the engine was growling like crazy all this while. Then suddenly the car launches itself like crazy. I almost hit another car coming from the opposite direction. Again, when I shut down the car and switched it back on it seemed to work fine. This happens very often. I have written to Audi but heard nothing.

- Beaverton, OR, USA