Audi A4 Electrical System Problems
Owners have filed 469 complaints with NHTSA about electrical system problems on the Audi A4 across 28 model years. The 2020 model year has the most (91). The words owners use most often: “ignition coil” (11% of reports).
- 469electrical system complaints
- —median miles at failure
- 2mention a crash
- 2mention an injury
- 3related recalls
- $1,650typical repair cost reported by owners
- 35%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Ignition coil: mentioned in 50 of 469 complaints (11%)
- Backup camera: mentioned in 36 of 469 complaints (8%)
How much does it cost to fix?
Owners who wrote down what they paid or were quoted put the typical electrical system repair on the Audi A4 at $1,650, and half of them between $1,400 and $2,150.
Based on 13 NHTSA complaints about this problem alone that state a repair bill or quote (1999–2026), converted to 2026 dollars with the U.S. consumer price index. These are owners' own figures, not a quote: they include dealer quotes, and owners who file complaints often faced larger repairs, so they can run higher than typical shop prices. Prices vary by shop, region and warranty coverage. How we calculate this.
At what mileage do electrical system problems happen?
Based on 218 complaints that reported the odometer reading.
How serious are the reports?
Of 469 complaints, 2 mention a crash, 25 a fire, 2 an injury.
Audi A4 electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2024 A4 | 1 | 50% | — |
| 2023 A4 | 3 | 30% | — |
| 2021 A4 | 3 | 27% | — |
| 2020 A4 | 91 | 71% | 54,000 |
| 2019 A4 | 3 | 30% | — |
| 2018 A4 | 17 | 39% | — |
| 2017 A4 | 6 | 11% | 36,500 |
| 2016 A4 | 3 | 27% | — |
| 2015 A4 | 3 | 16% | — |
| 2014 A4 | 3 | 9% | 64,000 |
| 2013 A4 | 2 | 8% | — |
| 2012 A4 | 2 | 11% | 147,500 |
| 2011 A4 | 1 | 9% | — |
| 2010 A4 | 2 | 3% | 150,000 |
| 2009 A4 | 3 | 3% | 44,598 |
| 2008 A4 | 9 | 5% | 39,600 |
| 2007 A4 | 10 | 5% | 72,500 |
| 2006 A4 | 21 | 7% | 69,000 |
| 2005 A4 | 24 | 11% | 60,000 |
| 2004 A4 | 15 | 8% | 62,242 |
| 2003 A4 | 32 | 15% | 56,600 |
| 2002 A4 | 76 | 42% | 9,700 |
| 2001 A4 | 35 | 27% | 43,570 |
| 2000 A4 | 11 | 11% | 52,000 |
| 1999 A4 | 11 | 6% | 98,000 |
| 1998 A4 | 23 | 9% | 68,000 |
| 1997 A4 | 33 | 34% | 118,000 |
| 1996 A4 | 26 | 29% | 90,500 |
When owners reported it
Related recalls (3)
Electrical system:ignition:switch
Model years: 1996, 1997
Problem: On certain passenger vehicles, as a result of a problem in the production process of the ignition switch, the anchor point of the spring may crack. This could potentially cause the return spring force to be insufficient for returning the ignition key to the running position after starting the engine.
Risk: This condition causes electrical accessories such as windshield wipers and headlights to become inoperative increasing the risk of a crash.
Fix: Dealers will install a new ignition switch with an optimized anchor point free of charge. The recall began on november 27, 2006. Owners may contact audi at 1-800-822-2834. Note: this recall supersedes the remedy program under a previous recall (please see 00v317).
Electrical system:ignition:switch
Model years: 1996, 1997
Problem: Vehicle description: passenger vehicles. The plastic ignition switch housing can fracture at the return spring anchor point. Fracture of the housing could cause the return spring force to be insufficient for returning the ignition key to the running position after starting the engine.
Risk: This condition causes electrical accessories such as windshield wipers and headlights to become inoperative.
Fix: Dealers will replace the ignition switch.
Electrical system:horn
Model years: 1996
Problem: The horn can work only intermittently due to insufficient electrical ground contact.
Risk: This condition could prevent a driver from sounding a warning by using the horn increasing the potential for a vehicle accident.
Fix: Corrective action: dealers will install a ground contact spring which will enhance the electrical ground connection.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
My 2020 Audi A4 has an open safety recall campaign. Audi Corporate and my local dealership are formally refusing to perform the recall remedy unless I pay over $2,000 out-of-pocket to replace a broken J949 SOS Telematics Module. The manufacturer claims the module is separate from the recall, but…
The contact owns a 2020 Audi A4. The contact stated that while driving at an undisclosed speed, the message SOS module no longer connected was displayed on the instrument panel, and the vehicle failed to shut off. The contact believed that the failure was a safety issue due to the loss of…
A vehicle diagnostic scan dated 04/15/2026 showed electrical communication faults involving vehicle control modules. The scan showed U014100, described as âLost Communication With Body Control Module âAâ,â with status listed as passive/sporadic. The scan also showed U112100, described as…
A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: P084100, described as âTransmission fluid pressure sensor/switch A range/performance,â with status listed as passive/sporadic. This indicates a transmission / powertrain…
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…
Frequently asked questions
Do all Audi A4s have electrical system problems?
No. NHTSA has 469 owner complaints about electrical system for the Audi A4. Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the Audi A4 electrical system?
Yes: 3 safety recalls list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
How much does it cost to fix electrical system problems on the Audi A4?
Owners report a typical cost of $1,650 (half paid between $1,400 and $2,150), from 13 complaints that state a repair bill or quote, in 2026 dollars.
What do owners say about electrical system problems on the Audi A4?
The most frequent phrase is “ignition coil”, in 50 of 469 complaints, followed by “backup camera” (36).
Other Audi A4 problems
See all Audi A4 problems.