2018 Audi A6 / S6 Repairs and Problem Descriptions at TrueDelta

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See repairs for all Audi A6 / S6 model years.

Audi A6 / S6 in South Carolina, United States Dec 2020 - Jun 2022
Nov 2021 35000 mi	Transmission was replaced. It was making a rhythmic noise. Transmission replaced. Differential was causing grinding noise while turning.

Audi A6 / S6 in New Hampshire, United States Jun 2021 - Jun 2022
Mar 2022 39000 mi US $855	Replaced supercharger drive belt

Audi A6 / S6 in Florida, United States Jun 2017 - Apr 2020
Dec 2018 20000 mi	Power sunshade for rear window became very noisy at the ends of its travel (i.e. when almost completely deployed, or almost completely stowed). Sunshade unit (to include the shade itself and the motor) was replaced.

Audi A6 / S6 in Poland Jan 2021 - Jun 2022
Nov 2021 81840 mi $1200	Mushy, weak breaking. Replaced pads and rotors in front, only pads in the back.
Apr 2022 84940 mi $2000	Electro valve broke, leaking coolant. Also the throttle flap (?) was cleaned. Wind noise from the sunroof area. The seal is deformed, not aligning properly. Waiting for replacement seal to arrive.
Jun 2022 88040 mi $600	Adaptive cruise control reports sensor "no vision" repeateadly. Initial diagnostic didn't show anything. Waiting for spare cable for test swap. Bad feelings about this.

Audi A6 / S6 in California, United States Jun 2017 - Jun 2022
Jun 2018 18500 mi US $1000	Front rotors had groove in them. Shop attributed to possible rock having gotten stuck.

Audi A6 / S6 in Illinois, United States Jun 2015 - Jun 2022
Mar 2017 12000 mi	Drivers side mirror will not retract in cold weather. Took to dealer they put it in warm shop for 3hrs before diagnosing and could not reproduce. Weather has warmed enough that the mirror works again
Jan 2020 33000 mi US $9800	Turbo screens clogged and caused both turbos to fail.

Audi A6 / S6 in Texas, United States Jan 2021 - Jul 2022
Apr 2021 34500 mi	O2 sensor threw check engine light. Issue mentioned in TSB, and O2 sensor replaced under extended warranty of 10yrs/120K miles provided by 2nd related TSB. This was a different O2 sensor from a similar repair trip in December 2021.
Jan 2022 37000 mi US $300	All 4 upper guidelinks were worn, and needed replacing. Repair included alignment and safety sensor calibration post install. This was covered under 3rd party extended warranty. O2 sensor threw check engine light code DTC P209600 and/or P209800 mentioned in TSB. O2 sensor replaced for free under extended warranty courtesy of 2nd related TSB.

Audi A6 / S6 in California, United States Apr 2016 - Dec 2019
Apr 2017 5000 mi	Satelite antenna replace for GPS

Audi A6 / S6 in Virginia, United States Apr 2016 - Apr 2018
May 2016	Front parking sensor fogged over - electrical fault.
Jun 2016 2000 mi	Creaking noise at low speed from steering wheel. Clock spring in steering wheel replaced and adjusted. Required 4 days to diagnose & an hour to repair at Audi of Arlington; Schmitt's Audi in Buffalo took 1 hour to diagnose.
Feb 2018 6000 mi	Initially noticed parking cameras not displaying on MMI screen despite the distance sensors working (could hear beeping as approaching objects). Then, within a week, the battery was completely dead. Could not jump car from engine bay battery posts; car had to be jumped from battery under spare tire.

Audi A6 / S6 in Saskatchewan, Canada Aug 2015 - Dec 2017
May 2016 3600 mi	The S6 sill plate in the drivers door had a dent when delivered. The dealer ordered the replacement and installed when doing the 8000km maintenance.

Audi A6 / S6 in Colorado, United States Apr 2016 - Jun 2018
May 2018 13000 mi	Air bag light was on due to broken driver's seat belt buckle not working. It was replaced under warranty.

Audi A6 / S6 in Virginia, United States May 2019 - Jan 2023
Jul 2019 38329 mi	Cup holder flap will not open properly.
Jul 2020 65958 mi	Rear pads and rotors replaced.
Mar 2022 104748 mi US $1800	Recommend replacing water pump assembly. EPC light is on. Fault code P2563 Turbocharger Boost Control Position Sensor Circuit: Implausible. Replaced front brake pads and rotors.

Audi A6 / S6 in Kentucky, United States Feb 2017 - Nov 2021
Aug 2020 43000 mi	Cracked water jacket

Audi A6 / S6 in Ontario, Canada Sep 2015 - May 2018
Mar 2018 31000 mi	right passenger grab handle replaced since return spring on original was shot

Audi A6 / S6 in Illinois, United States Sep 2015 - Apr 2019
Mar 2018 21000 mi	camshaft timing adjuster failure.

Audi A6 / S6 in Georgia, United States Jun 2016 - Jun 2022
Nov 2016 3300 mi	Fuel pressure sensor replacement

Audi A6 / S6 in New Jersey, United States Jul 2016 - Sep 2018
Oct 2016 21000 mi	Engine lost power, and made a lot of noise. Piston ring found in oil pan. Engine replaced under warranty. Reason given for replacement: piston failure.
Jun 2017 34449 mi	Expansion tank and hose replaced under warranty. In shop for five days.
Mar 2018 57000 mi US $85	Starter failed while out driving. Wife had to drive almost an hour to pick me up. Starter was back ordered in Germany.

Audi A6 / S6 in Florida, United States May 2015 - May 2018
Aug 2017 24000 mi	Rotors had a factory defect that caused them to deform, creating vibrations during braking. This was a known issue but I was not contacted. When I had the vibration I came in and they informed this would not affect braking capability, but that they were authorized to replace the entire breaking system when the issue was reported.

Audi A6 / S6 in California, United States Jan 2016 - Sep 2016
Jul 2016 9200 mi	The nut in the bottom right of the license plate housing fell in.

Audi A6 / S6 in Florida, United States Sep 2015 - Oct 2016
Oct 2016 21000 mi	Turbo had a failed seal

Audi A6 / S6 in Arizona, United States Apr 2015 - Nov 2022
Sep 2015 2000 mi	Diesel exhaust system cleaning was not occurring. Dealer installed a missing fuse which was missing from the factory and not caught during PDI.
Sep 2019 34000 mi	Fuel flap on body was not unlocking consistently.

Audi A6 / S6 in Singapore Apr 2016 - Jul 2018
Feb 2018 18600 mi	Thermostat
Jul 2018 22320 mi	Rubbing noise every time I turn left

Audi A6 / S6 in Massachusetts, United States Jun 2021 - Jun 2022
Jun 2022 60000 mi US $1200	front brakes

Audi A6 / S6 in Texas, United States Mar 2016 - Jun 2018
Dec 2017 24000 mi	Went for a oil change and found the thermostat was leaking repaired but took extra time
Apr 2018 29000 mi	Had a leak on the water pump, second repair but this time they replaced brackets and a few other things 2000 miles later all seems good

Audi A6 / S6 in California, United States Jun 2015 - Dec 2016
Nov 2015 1900 mi	Water leak from A/C soaked carpet and computer modules on floor. Required replacement of carpet, cleaning of mold, and exchange of computer modules.
Jan 2016 2300 mi	Trim damaged during last repair had to be repaired. One piece of trim was glued instead of replaced. More trips. Rattle on sunroof and dash. Rear seat leather replaced due to bad appearance. Replaced leather seat had creases than required a further trip to fix.
Apr 2016 4000 mi	Rattle on sunroof. Broken trim on seat.
Dec 2016 10000 mi	Sunroof rattle never fixed.

Audi A6 / S6 in Ohio, United States Feb 2016 - Jun 2018
Apr 2016	MMI System was basically inoperative unless I hard rebooted the system 1-2 times every time I drove the car.
Sep 2016 5000 mi	The cooled seats seemed inoperative
Dec 2016 8000 mi	MMI had to be replaced

Audi A6 / S6 in Illinois, United States Jun 2016 - Jun 2018
Aug 2016	Knocking sound over bumps. Not identified or fixed.

Audi A6 / S6 in Colorado, United States Nov 2016 - Apr 2017
Jan 2017 8000 mi	Front rotors had hot spots. Rotors were replaced.

Audi A6 / S6 in Arizona, United States Feb 2015 - Jun 2018
Jun 2018 32000 mi	2 front wheel bearings replaced

Audi A6 / S6 in Ohio, United States Oct 2020 - Jun 2022
Nov 2021 61000 mi US $1800	MMI Unit replaced
Jan 2022 63000 mi US $566	Rear pads and rotors

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