2019 Audi Q8

Due to a leak in the rear axle that is connected to the differential, it caused the entire differential to fail. The bearing within the differential completely failed due to contaminated oil. The Q8s are known to have this occur but only in year models 2020-2022. My Q8 is a 2019 and Audi is aware of these issues given technical service bulletins available but doesnt want to take responsibility as this may be a continuing manufacturing issue arising. My vehicle only has 65k miles on it and Audi admits this is rare. Due to a misdiagnosis in June of 2025 (oil leak), Audi of Seaside Monterey caused the complete failure of the differential in December of 2025 by not doing a deeper diagnosis earlier to resolve the catastrophic failure. This is a safety concern and very expensive. A new differential costs $12k which has been expected to pay with no accountability. I am currently in an active case with Audi Seaside and the BAR to come to a resolution.

Driving vehicle at a low/medium rate of speed, and car completely shut off without warning. Check engine light appeared after restarting the vehicle. This is the second time this has happened to me since November 2022. I filed a report then as well. This car should not be allowed on the road and Audi should be forced to buy it back. The vehicle has less than 35,000 miles. Dealer has not confirmed what the issue is this time.

November 18, 2022 a warning lamp of electric system problem was displayed. There is no local Audi dealer and I decided to take the vehicle to my local automotive repair shop that does non warranty repair on Audis. I drove approximately 6-8 miles after the light came on and was one half mile from the service technicians when within 300 yards the vehicle became sequentially inoperable. First power steering, then transmission, brakes , ended with engine failure. I was in rush hour traffic and unable to steer off the road so I was blocking traffic near an intersection. My flashers and power windows were all that functioned. The doors were locked. When the tow truck arrived he let me out of the car. I was not injured and the vehicle was not hit either. The vehicle was transported to Audi Beaverton Oregon and now 3 1/2 months later is still there because there are no available starter/generator units available in this country. That unit failed and was the cause for my Audi’s complete shutdown. This was a potentially very dangerous situation and needs to be reported for a recall campaign. I have read that there are thousands of similar failures of the starter/generator systems in the USA and no available parts. I still have no estimate from my Audi Beaverton dealer/sevice supervisor as to when I can expect to get my car repaired and returned to me. They have not provided a loaner vehicle and refuse to cover the full cost of a rental car. I am disappointed in Audi’s level of customer service and communication.

Got Electrical System Malfunction to start. I called service and they said car was safe to drive. Continued driving got a fault for automatic start/Stop malfunction, followed by: Right lug nut loose Right brake light malfunction Parking brake malfunction Distance indicator malfunction Power Steering malfunction Drive train ,malfunction. Car engine started hesitating and dash went totally blank. Car was hard to steer , luckily I live near the dealership. Dealer said there are 30 cars in their service department with the same problem. I am #3000 on Audis waitlist for parts to fix problem. 48 volt battery and alternator.

Vehicle lost all power and control while driving 45mph. First electrical system failure warning came on. Within 2 minutes the transmission slipped into neutral and 15 seconds later the vehicle lost power and I coasted to a stop. I was told by Audi dealership service that the starter generator failed. They mentioned they currently have over 20 vehicles in their shop and over 25 at their other location with the same problem. They also said over 1,000 cars nationwide had same problem and the part to repair is back ordered and no reasonable estimate of repair time.