2019 Audi A6 engine problems

Related recalls

No recalls on file.

What owners say

1. Filed Aug 17, 2026VAEngineOther / Unknown

   The factory-installed mechanical water pump module suffered a severe internal seal and housing failure. This allowed pressurized engine coolant to migrate directly into the engine's vacuum control system and vacuum lines, damaging crucial emissions and vacuum tubing. This defect poses a severe safety risk as coolant entering the vacuum grid can cause sudden loss of engine power, erratic braking assist, and localized engine overheating while operating the vehicle at highway…

   NHTSA complaint #11757339 · source
2. Filed Jul 8, 2026NJEngine

   My 2019 Audi A6 was diagnosed with catastrophic internal engine failure on May 9, 2026 at Audi of Newton, Newton, NJ, at 93,645 miles. The vehicle required a full engine rebuild performed by REV Auto NJ at a cost of $12,000. The failure involved metal debris found in the engine oil, consistent with the documented EA839 3.0L V6 TFSI rocker arm needle bearing failure or piston skirt failure affecting this engine family. The EA839 engine used in this vehicle has a documented…

   NHTSA complaint #11749217 · source
3. Filed Jun 15, 2026NJEngine

   I recently brought my 2019 A6 to Nyack Audi for an unrelated repair, after performing their complimentary inspection the service advisor told me my water pump was leaking coolant into the vacuum hose system; and the pump, PCV valve, sensors, solenoids and vacuum hose system need to be replaced, costing $6,186. My A6 was out of warranty at that point, so Audi would not pay for the $6,186 in repairs. Engine coolant purportedly leaks into the vacuum system and other electrical…

   NHTSA complaint #11744302 · source
4. Filed Apr 22, 2026TXBrakesElectrical SystemEngine

   Complete shut down of all electrical associated components while driving on highway Loss of power steering loss of braking loss of ability to accelerate transmission failure loss of lane detection, loss of car detection. Diagnosed as , faulty alternator recall repaired and continuation of same electrical failures despite six additional repairs Multiple failures of all electrical components on highway road and side roads

   NHTSA complaint #11732943 · source
5. Filed Jan 21, 2026VAElectrical SystemEngine

   My 2019 Audi A6 sedan displays warnings for the Start/Stop system malfunction indicated in Audi's document: "Emissions Service Action Code: 27BQ" [XXX] I'm still waiting to hear if this has been elevated to Recall status. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint #11712442 · source
6. Filed Aug 21, 2025TXEngine

   My water pump failed at 49,000 miles. I have been advised by Audi that it is not covered by the extended warranty for some similar cars.

   NHTSA complaint #11682050 · source
7. Filed Jan 16, 2025TXElectrical SystemEngineSteering

   Yellow battery indicator light came on while driving car in 35 degree weather after a week of sitting in garage (holidays). I pulled over, read the manual and it said this could cause battery light to illuminate. I called the dealership service to ask them, they said possible reason. I decided to drive across city to dealership, 25 minutes away. On HOV lane, red warning lights flashing to pull over then 5 seconds later everything went black. No electrical, no engine, car…

   NHTSA complaint #11636241 · source
8. Filed Jan 28, 2024OHElectrical SystemEngineTransmission & Drivetrain

   The car gave me electrical malfunction warning while driving on the highway, then all the screens turned black, and the car completely shut down while driving. The steering was still working, although heavier than usual, and the breaking also worked. The car slow down to a complete stop at the shoulder of the highway. This was very concerning, and thankfully happened close on exit with a shoulder at the side in which I was able to park the car.

   NHTSA complaint #11568315 · source
9. Filed Dec 13, 2023MOElectrical SystemEngine

   Electrical fault dash warnings (steering, transmission, braking and many other things too numerous to mention came on while driving the car and it went into limp mode and forced the car to stop and would not restart. The car had to be towed to the dealership where they diagnosed the problem to be the "alternator" which is more accurately what is known as the "belt starter generator" BSG. The BSG runs the start stop feature of the car and charges the mild hybrid 48v battery…

   NHTSA complaint #11559844 · source
10. Filed Nov 9, 2023NHElectrical SystemEngineAcceleration & Cruise Control

    Car shut down while driving due to the electrical system malfunction; had to get the car towed; ended up being a known issue by Audi with no recall related to the alternator; replaced with new alternator

    NHTSA complaint #11554395 · source
11. Filed Oct 23, 2023CAElectrical SystemEngineFuel, Hybrid & EV Propulsion

    The Alternator had failed along with the battery and shut off the car, rendering it useless on the road. The vehicle is still under the New Car Warranty. It was a hazard as it could not be put into neutral and was stuck in park. The dealer had confirmed it was a manufacturer-wide problem with waits of up to 3-6 months for the part. The tow truck had difficulty towing it up as the car was not able to roll. Before the car shut off immediately it had given the warning…

    NHTSA complaint #11551281 · source
12. Filed Sep 9, 2023NJElectrical SystemEngineSteering

    This is my SECOND entry/complaint regarding the same EXTREMELY DANGEROUS steering malfunction. While driving my 2019 A6 (this time alone) in heavy rain the same warning message was displayed. The warning stated: steering malfunction, please stop the vehicle!. At which point the power steering locked-up & the engine powered down. As a result, I was unable to steer the vehicle. One again I was able to exit the highway safely. Being close to home with only a few turns, I was…

    NHTSA complaint #11543573 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology