2014 Audi S6

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.

I was driving hit a puddle of water, then all the sudden my power steering went out. I took it in to get looked at, and I'm being told it will cost several thousand dollars to fix the power steering. In addition, this vehicle has air in the suspension, but it now makes sounds when it lifts and takes a longer period of time to lift than normal. Something is effected in my suspension, as well. My vehicle only has 67,689 miles on it, and it should not be having power steering problems from driving through a puddle of water. Lastly, after calling in to Audi, they did a search for the warranty, and Audi did add an extended warranty on the power steering of 125,000 miles or 10 years, which ever occurs first. This means they know about the power steering issue, and with my car being just over 10 years old, the power steering is not covered. I also know a friend who has a 2015 S6 Audi with just under 125,000 miles on it. It happened to him, as well. I will let him know he needs to report the issue, because there is a clear power steering or electrical problem. I have no power steering as of now, and to me, this is a safety issue. I believe something electrical got shorted out which is causing the power steering to be manual steering and problems with suspension when lifting. I'm mainly concerned with the power steering going out with under 70k miles and it takes a lot of effort to drive this. I shouldn't be driving the car right now, but I have not choice at the moment.

NHTSA ID

11667752

Incident

Jun 5, 2025

2014 AUDI S6- Consumer states " I am writing to file a claim for a vehicle recall on my 2014 Audi S6. The date of the recall is March-20-2022. The NHTSA Campaign# is 22V-178. The Audi Recall# is 21H7. The specific defect that is being recalled is Turbo failure. In early 2021, I experienced multiple problems with my vehicle that were consistent with the recall, such as Rough Idling, Difficult to Start, and Stalls. It was fixed at a local Audi dealership in May-2021 (prior to the recall announcement). I was responsible for the repair expenses, which totaled $4198.29, for the Turbo and oil strainer replacement. When I became aware of the recall, I filed a claim with Audi to request reimbursement. Audi's recall website indicates that there are no recalls pending for my vehicle, but the Model Year/Model/Engine/Issue is consistent with the scope of the recall. In over 7 months after filing the claim, I have not heard back from Audi even after repeat inquiries. I would like NHTSA's help to get reimbursement from the OEM. Please contact me if any additional information is needed, such as a copy of the repair invoice. Thank you for your time and attention to this matter.

NHTSA ID

11530106

Incident

May 10, 2021

I am writing to formally lodge a complaint regarding the persistent and premature failure of motor and transmission mounts on the 2014 Audi S6, manufactured and sold by [Automaker Company Name]. This issue has resulted in significant inconvenience and financial burden and, more importantly, poses profound safety implications for the passengers and drivers of affected vehicles. Background: I own a 2014 Audi S6 with Vehicle Identification Number (VIN): [XXX]. Since purchasing the vehicle in 2018, I have experienced repeated failures of the motor and transmission mounts at alarmingly low mileage intervals. The motor mounts have been malfunctioning and requiring replacement approximately every 20,000 miles. This recurring issue has not only resulted in significant expenses but also raised serious concerns about the overall safety and reliability of the vehicle. Safety Implications: The failure of motor and transmission mounts has severe safety implications for the passengers and drivers of the affected vehicles. When these crucial components fail prematurely, they can cause sudden and unexpected movements and vibrations in the engine and transmission systems, compromising the vehicle's stability, control, and overall safety. This defect can potentially lead to accidents, injuries, or even fatalities, both for the occupants of the Audi S6 and other road users. Financial and Non-Financial Consequences: The repeated failure of motor and transmission mounts has imposed significant financial and non-financial burdens on me as an owner. The cost of multiple replacements and repairs is high and unreasonable for a vehicle of this caliber. Moreover, the frequent breakdowns have caused significant inconvenience, as I have had to endure extended periods of vehicle downtime, repeated trips to the service center, and associated expenses for towing and alternative transportation. Request for Resolution: Considering the seriousness of this matter, I request that AUDI USA i INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATIO

NHTSA ID

11526318

Incident

Jun 1, 2023

Camshaft Actuator, Camshaft positioner, Camshaft sensors. No warning or dash lights, car abruptly stopped on Highway while traveling 65mph 15 hours after Audi replaced replaced both fuel pumps and oil screen recall fix. Inspection of entire vehicle was done at time of recall fix and fuel pumps replaced. This is the second time in 30k miles that the camshaft components failed without warning. This is a major job and very expensive. Why hasn't this issue been recalled?? This is a safety hazard and a public safety issue. This could have caused a fatal accident while I was driving my family the store.

NHTSA ID

11480926

Incident

Aug 21, 2022

Two months into owning the car, my turbo failed. Car was towed to dealership and are trying to charge me 11,000$. 2 weeks into owning vehicle. Noticed oil level at minimum. Call dealer and was advised to add oil. Never was told to come into service to have it checked. Upon further investigation, I had found out first week of august about recall. While and prior to purchasing. Dealership never informed me about any safety recalls. Previous owner had put on some aftermarket parts, which have nothing to do with faulty manufacture part. Oil strainer in turbo had failed and caused turbo failure. Dealer personnel have stated “There is nothing we can do for you. Your car is not eligible for a recall repair.” Whilst Audi of America had stated that it is a manufacturing fault and they should repair and inspect. My car has been at the dealership for over a month, has not been touched, nor inspected for this. Was told today 08/17/2022 to return the loaner they had given me and “pick up my car” which is not operational at all. Have tried to reach out to the dealership numerous times, and am not received any calls back until today 08/17/2022 to retrieve my car. I have been treated rudely, and have been lied to and misinformed by Audi of Naperville Illinois since the day I purchased. Was verbally told my car was certified with warranty, but now all of a sudden, there is no certification. Sales man Amin had sold me the car. Was told by numerous Audi dealerships this car should not have been on the market. General manager Michael Margas has not been willing to compromise or come with a solution. Only solution was to give me 18 thousand for my car to trade in and a 900$ payment a month on another car which is 300 dollars more than what I have. He had also tried to give me a 1000$ “good will” to repair the parts. Also was told car was serviced 2 weeks prior to purchasing. Last service was December of 2018. I have the service records printed, recall incomp..

NHTSA ID

11479882

Incident

Jul 12, 2022

The contact owns a 2014 Audi S6. The contact stated that the vehicle failed to start. The vehicle was towed to the local dealer to be diagnosed. The contact was informed that the turbocharger needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was informed that the repair would not be covered due to aftermarket parts. No additional assistance was provided. The contact stated the failure was due to NHTSA Campaign Number: 22V178000 (Engine and Engine Cooling). The failure mileage was approximately 78,000.

NHTSA ID

11471978

Incident

Jun 13, 2022

Mileage

78,000 mi

While driving, received notification of a suspension fault. Was able to drive vehicle home, and found code for suspension C104600. Cleared code, and didn't see it return. Car sat a few days, and next time it was driven, received cascade of MIL warnings for suspension auto leveling failure, auto leveling headlights, adaptive cruise, lane keeping, and auto braking. Console advised to keep speed below 35 MPH. Had to quickly exit the road as result. Limped vehicle home on side roads, found codes across multiple systems. Suspension would not raise, and all coda would immediately return upon clearing. Vehicle was evaluated by local shop, and diagnostics show failed suspension air compressor and relay.

NHTSA ID

11468065

Incident

May 16, 2022

The turbo failed while driving the car at normal speed trying to enter freeway. Luckily I was able to get the car to the side of the road safely. The vehicle has always been serviced by Audi on prescribed intervals. After researching, I found a TSB on the oil screens that feed the turbos. The dealer (Audi Miramar, San Diego) told me this is not/was not a required repair and quoted me $16k to replace the turbos and replace the faulty screen. I ended up taking the car to another authorized Audi repair center and got them repaired for $9k. Audi needs to address this before someone has an accident.

NHTSA ID

11458973

Incident

Aug 19, 2021

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 bulletin provides information when there are noises in the overrun ( e.g. whirring, howling) - vehicles with 0BC.

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

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

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