2018 Audi A4 problems and complaints
Owners have filed 43 complaints with NHTSA about the 2018 Audi A4. The most-reported areas: Unknown Or Other (18), Electrical System (16), Structure (6).
Key takeaways
- 43 owner complaints on file with NHTSA.
- 1 involve a crash, 0 a fire, 0 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Unknown Or Other | 18 | 42% |
| Electrical System | 16 | 37% |
| Structure | 6 | 14% |
| Fuel/Propulsion System | 6 | 14% |
| Power Train | 5 | 12% |
| Engine | 5 | 12% |
| Air Bags | 4 | 9% |
| Forward Collision Avoidance | 4 | 9% |
| Service Brakes | 3 | 7% |
| Suspension | 2 | 5% |
| Back Over Prevention | 2 | 5% |
| Tires | 1 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2018 Audi A4 4 DR AWD | 5/5 | 4/5 | 5/5 | 5/5 |
| 2018 Audi A4 4 DR FWD | 5/5 | 4/5 | 5/5 | 5/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Tires - filed 2026-10-14
I am reporting a serious vehicle safety incident involving my 2018 Audi A4. On XXX, while traveling from [XXX] to [XXX] with my [XXX] son in the vehicle, all four tire valve stems failed during a single interstate journey. The first failure occurred on the front-left tire, causing nearly instantaneous tire deflation. ...
Power Train,electrical System,unknown Or Other - filed 2026-07-02
A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: P084100, described as “Transmission fluid pressure sensor/switch A range/performance,” with status listed as passive/sporadic. This indicates a transmission / powertrain control concern involving the...
Electrical System,structure,unknown Or Other - filed 2026-07-02
A vehicle diagnostic scan dated 04/15/2026 showed electrical communication faults involving vehicle control modules. The scan showed U014100, described as “Lost Communication With Body Control Module ‘A’,” with status listed as passive/sporadic. The scan also showed U112100, described as “Data bus message missing,” wit...
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More for the 2018 Audi A4
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.