Problems · NHTSA complaints

2021 Audi S8 problems

Owners filed 1 complaint about the 2021 Audi S8 with NHTSA between Dec 2022 and Dec 2022. The most-cited component is power train (1).

Complaints
1
Filed with NHTSA
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Power train1
  2. Electrical system1
  3. Engine1

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 28, 2026NHTSA vehicle page
03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Power train

1 report
“When started up on 11/17/22, multiple warning lights came on in rapid sequence advising of an electrical system & battery malfunction. Warning was to not drive the vehicle and contact service. I shut off the vehicle and re-started it. The same warnings were displayed. I was about 0.8 mile from the dealer so I attempted to drive it to their location. On the way, the warnings continued to show. After about 0.6 miles, the transmission fully disengaged from the engine. I coasted to the side of the street, shut off the vehicle, re-started it (same warnings showed) but the transmission was reset and worked. I drove to the dealership where my Audi mechanic knew exactly what the issue is--there is a huge problem with a Continental-supplied 48V belt starter/generator that needs to be replaced. However, none are available and won't be available until sometime in Q1 2023 or later. The replacement part is backordered with every Audi dealership experiencing this issue with multiple models in the MY's of 2018 through 2023. Had this issue occurred on an Interstate highway (complete loss of transmission), I could have been rear-ended by a vehicle following me. In a multi-lane…”
Owner complaint to NHTSAFiled Dec 31, 2022Power train, Electrical system, EngineODI 11499620

Electrical system

1 report1 related recall

Engine

1 report
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.