2013 Audi S8

On March 29, 2021, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE 21-009) after the agency received 58 reports alleging engine stalling in 2013-2016MY Audi vehicle models A8, S6, S7, S8 & RS7 equipped with the 4.0L, twin-turbocharged engine. Complainants reported the vehicles would stall with no warning while driving at highway or city traffic speeds. Several of the complainants alleged an inability to restart. The complaints alleged the major contributing factor to the engine stalling was the failure of the turbochargers. The complaints cited the turbocharger failure was a result of oil starvation due to a clogged oil strainer in the turbocharger oil supply line.The location of the oil strainer in the turbocharger oil supply line is in the inner valley of the engine. It is not easily accessible, making servicing the component difficult. The oil strainer removes particles and carbon deposits from the oil before lubricating the turbochargers. Over time, if the debris is not removed from the oil strainer, it becomes clogged and prevents oil from flowing to the turbochargers. This causes the turbine bushings to run dry and overheat resulting in turbine shaft failure due to thermal stress.On April 04, 2022, PE21-009 was upgraded to an Engineering Analysis (EA22-001) to further assess the scope, frequency, and potential safety related consequences of the alleged defect. Volkswagen filed recall 22V-178 to replace the 30?m mesh oil strainer with a 90?m mesh oil strainer in the subject vehicles. VW introduced the larger mesh oil strainer into production in March of 2017 effecting the 2017-2018MY vehicles.ODI reviewed information from VW for vehicles that had the larger mesh installed in production. The data received showed, since the new oil strainer size of 90?m went into production for the 2017-2018MY, there has not been any reported incidents of turbocharger failures due to oil starvation or other failures that could be related to the larger screen mesh. In view of the recall being conducted by VW and lack of any detrimental side effect to the turbocharger caused by the larger mesh, ODI is closing this Engineering Analysis (EA). The agency reserves the right to take additional action if warranted by future circumstances.11502847,11506565,11494663,11488813,11486393,11480926,11479882,11476289,11466761 11464663,11463254,11460580,11460496,11458973,11458804,11457556,11454753,11452668 11452589,11452584,11452383,11452175,11452111,11451724,11451724,11450995,11450988 11449661,11447092,11443657,11442867,11440536,11440052,11439959,11438691,11436461 11435619,11433925,11433733,11432336,11431661,11431421,11429704,11429584,11428128 11426929,11424203,11423603,11423337,11422431,11421084,11420626,11420342,11419693 11418884,11418437,11418433,11418135,11417635,11417351,11416095,11414578,11414235 11414064,11413359,11413285,11413214,11407510,11407450,11406897,11406821,11406637 11406460,11406416,11406291,11406287,11406277,11406273,11406263,11406256,11406251 11406229,11406222,11406208,11406204,11406197,11406182,11406015,11404665,11404426 11404348,11403823,11403430,11403268,11402684,11399435,11397821,11396241,11394763 11391037

On March 29, 2021, the Office of Defects Investigation (ODI) opened Preliminary Evaluation (PE) 21-009 after the agency received 58 reports alleging engine stalling in 2013-2016MY Audi vehicle models A8, S6, S7, S8 & RS7. The subject vehicles are equipped with 4.0L, twin-turbocharged engine. Complainants reported that the vehicles stall suddenly with no warning while driving on the highway or in city traffic. Several of the complainants alleged an inability to restart. The complaints allege the major contributing factor to the engine stalling is the failure of the turbochargers. The complaints further allege the turbocharger failure is a result of oil starvation due to a clogged oil strainer.The location of the oil strainer in the turbocharger oil supply line is in the inner valley of the engine. It is not easily accessible, making regular service difficult. The oil strainer removes dirty particles and carbon deposits from the oil before flowing to lubricate the Turbochargers. Overtime if the debris are not removed from the oil strainer, it clogs the strainer and prevents free flow of oil to the turbochargers and makes the turbine bushings to run dry and overheat which causes the turbine shaft to break due to thermal stress. In VW's response to ODI's Information Request letter, VW provided approximately 611 warranty claims with unique VINs, 70 Field Reports and 45 Consumer complaints. These reports allege engine stalling due to turbocharger failure similar to the NHTSA reports described above. To date, NHTSA has received approximately 98 allegations of stall due to turbocharger failures. The total of 824 reports shown in the table above eliminates duplicate reports received by both ODI and the manufacturer.This Preliminary Evaluation is being upgraded to an Engineering Analysis (EA) to further assess the scope, frequency, and potential safety related consequences of the alleged defect of engine stalling due to turbocharger failureThe ODI complaints cited above can be viewed at www.NHTSA.gov under the following ODI identification numbers:11452589, 11452584, 11452383, 11450995, 11450988, 11449661, 11447092, 11442867 11440536, 11440052, 11439959, 11438691, 11436461, 11435619, 11431661, 11429704 11429584, 11426929, 11424203, 11423603, 11423337, 11421084, 11420626, 11420342 11418884, 11418437, 11418433, 11417635, 11417351, 11416095, 11414235, 11413359 11413214, 11413285, 11413133, 11407510, 11407450, 11407289, 11406821, 11406416 11406291, 11406277, 11406273, 11406256, 11406251, 11406229, 11406222, 11406204 11406197, 11406182, 11404665, 11404426, 11404348, 11403430, 11403268, 11399435 11397821, 11396241, 11394763, 11391037, 11388662, 11387166, 11377446, 11363283 11354107, 11344193, 11342497, 11342360, 11340302, 11325065, 11324163, 11322168, 11321144, 11318477, 11306754, 11279429, 11268109, 11256706, 11252723, 11246579 11234853, 11234714, 11231582, 11231013, 11230589, 11229484, 11222281, 11218822 11218749, 11217604, 11209168, 11209142, 11197149, 11191243, 11175842, 11170776 11164032, 11152418.

The windshield top gasket is not working and the glass can be easily pushed out an 1/8”. Wind can be heard while driving and when it’s raining water runs through steady stream. I was under the impression that the windshield is an integral part of the cars structure.

NHTSA ID

11492315

Incident

Nov 4, 2022

The dealer doesn’t want to perform the recall due to branded title. They should though. Please look into it

NHTSA ID

11483729

Incident

Sep 9, 2022

Engine turbocharger experience catastrophic damage, engine stalled, power steering was disrupted.

NHTSA ID

11450988

Incident

Feb 7, 2022

The car was running rough for a couple weeks; hesitant to accelerate, failed to start multiple times and idled rough. One day I was coming home from my hour long commute, I put the car in reverse in my driveway and the car started bucking so badly that it became un-drivable. At this point we had to get the car towed on a flatbed an hour away to the nearest dealership and this is when we discovered that the turbos had gone bad. There was no check engine light or any indication before it just failed. I am active duty in the United States Coast Guard and being without a car is not an option. Because of the shipping delay and waiting for the turbos to come from Germany, I was without my car for two weeks. I was loaned a vehicle but I had to rent a car for one day in between. We have been told by Audi dealerships for years that this was a known problem and to expect this $10,000 repair.

NHTSA ID

11431661

Incident

Jul 22, 2021

WHILE DRIVING ON THE MAIN HIGHWAY, MY CAR ENGINE SHUT OFF. I HAD DYSFUNCTIONAL BRAKE AND STEERING FAILURE. BRAKE WAS HARDLY WORKING AND I HAD TO USE ALL MY STRENGTH TO CONTROL STEERING. BASICALLY, WHILE DRIVING AT 50MPH, CAR ENGINE SHUT OFF WITHOUT WARNING AND I LOST STEERING AND BRAKING. I WAS ABLE TO PULL OFF THE ROAD INTO A VACANT PARKING LOT AND CAR CAME TO A STOP. FORTUNATELY, NO CARS WERE AROUND AT THE TIME. OTHERWISE, I ALONG WITH MY FAMILY WOULD HAVE BEEN INVOLVED IN A POTENTIALLY FATAL ACCIDENT. MY CAR HAD BEEN SERVICED BY AUDI SINCE PURCHASE. IT WAS JUST SERVICED WITHIN THE PAST MONTH. CAR WAS TOWED TO AN AUDI DEALER--THE TURBO CHARGER HAD FAILED. BASED ON THE DEALER DESCRIPTION, FAILER OF TURBO CAUSED THE CATASTROPHIC FAILURE OF BOTH THE STEERING AND THE BRAKES. THERE SHOULD BE A BACKUP SAFETY MECHANISM IN CASE OF TURBO FAILURE WITH AUDI 4L ENGINE--APPARENTLY, THIS DOES NOT SEEM TO EXIST. I CONTACTED AUDI AND THEY HAD NO EXPLANATION. IT WAS JUST BY GOD'S GRACE THAT HORRIBLE ACCIDENT DID NOT OCCUR. I HOPE YOU CAN PROVIDE SOME INSIGHT INTO THIS. BASED ON SOME BLOGS, THIS IS APPARENTLY COMMON WITH 4L TURBO ENGINES WITH AUDI.

NHTSA ID

11424203

Incident

Jul 1, 2021

TURBOS FAILED, CAR STALLED AND WILL NOT START UNLESS GIVING IT GAS. DOWN ON POWER AND PERFORMANCE. CHECK ENGINE LIGHT CAME ON

NHTSA ID

11423603

Incident

Jul 2, 2021

sUN ROOF EXPLODED ON MT AUDIS8 2013. 6/03/2021.

NHTSA ID

11419626

Incident

Jun 3, 2021

TURBOCHARGERS FAILURE DUE TO CLOGGED OIL SCREEN. HAD TO REPLACE BOTH TURBOCHARGER WITH NEW UNITS AND REPLACED OIL SCREEN WITH UPDATED VERSION

NHTSA ID

11406287

Incident

Apr 22, 2020

Mileage

58,000 mi

This bulletin provides a statement regarding the bottleneck of supply for VW approved oil types VW 504.00 and VW 507.00.

This bulletin provides information when there is a film/visible rings on the clear glass cover of the headlight when the dipped beam is switched on.

This bulleitn procides informaiton when tehre is a transmission warning mssage in the instrument cluster; P074100 is stored in the TCM.

This bulletin provides information when there are noises from the area around the instrument cluster.

This bulletin provides informationwhen noises/vibration are detected from front of vehicle in dynamic mode.

This bulletin provides informaiton when the transmission warning message appears in the cluster; P074100 stored in the TCM.