repaired · 2023 Q4
Occupant classification: front passenger
Risk. A disabled passenger air bag increases the risk of injury in the event of a crash.
2018 Audi A4Problems, recalls & complaints
NHTSA has logged 45 owner complaints about the 2018 Audi A4, most often about the electrical system. It is covered by 1 safety recall, and for recall 21V-874 the manufacturer reports only 77% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 14, 2026. Updated daily. Photo: Vauxford, CC BY-SA 4.0.
Complaints by system
Where the 2018 Audi A4 has problems
45 complaints grouped by the system owners reported.
17Electrical system
6Fuel/propulsion system
6Structure
5Engine
5Power train
4Service brakes
4Forward collision avoidance
4Air bags
2Back over prevention
98 other systems1 crash/fire/injury
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Electrical system | 17 | 0 |
| Fuel/propulsion system | 6 | 0 |
| Structure | 6 | 0 |
| Engine | 5 | 0 |
| Power train | 5 | 0 |
| Service brakes | 4 | 0 |
| Forward collision avoidance | 4 | 0 |
| Air bags | 4 | 0 |
| Back over prevention | 2 | 0 |
| 8 other systems | 9 | 1 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
1 recall
2018 Audi A4 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Audi.
Best & worst years
2018 vs. every other A4 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the A4 median. How we score
'95'96'97'98'99'00'01'02'03'04'05'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
- Avoid
- Caution
- Solid
- Best
- Not rated
NHTSA crash tests
2018 Audi A4 safety ratings
2018 Audi A4 4 DR AWD in NHTSA's New Car Assessment Program. Photos are from NHTSA's crash tests.
★★★★★
Frontal crash★★★★★
Side barrier★★★★★
Side pole★★★★★
- Rollover: 5 stars (9.9% risk)
- Stability control: Standard
- Forward collision warning: Standard
- Lane departure warning: Optional
In owners' words
What A4 owners report
Recent electrical system complaints filed with NHTSA, shortened. Personal details are removed.
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…
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…
The vehicle has a recurring interior rattle / loose-trim concern involving interior panels, trim, speaker/subwoofer area, rear shelf, dashboard area, or related mounting components. The noise is not merely a comfort concern if it is caused by a loose component, fastener, grille, panel, or speaker…
Own a 2018 A4?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.