2005 Audi A4 problems & reliability
219 owner complaints filed with NHTSA for the 2005 Audi A4, alongside 3 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
6 complaints report injuries (8 injured).
Federal crash records (FARS 2020–2023): 2005 Audi A4 vehicles were involved in 9 fatal crashes with 7 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Exterior Lighting | 101 | 46% |
| Air Bags | 54 | 25% |
| Electrical System | 24 | 11% |
| Power Train | 16 | 7% |
| Engine | 10 | 5% |
| Fuel System, Gasoline | 9 | 4% |
| Engine and Engine Cooling | 8 | 4% |
| Vehicle Speed Control | 8 | 4% |
| Steering | 6 | 3% |
| Tires | 4 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 59,000 miles (middle 50% between 46,250 and 81,000 miles), based on 163 complaints that included mileage.
Complaints by incident year
What owners report
“The contact's husband owned a 2005 Audi A4. The contact received several recall letters and cards from the NHTSA and Audi manufacturer for a Takata Air Bag recall. The contact stated that the last notification received stated that the owner could die if the recall was not completed. The contact was adamant and would…”
Air Bags · filed Jun 18, 2026
“The car is completely defective,total engine, gasket,water pump,intake manifold,airbag, transmission,torque,drive shaft, universal joints,all rear axles,wheel bearing,bought at auction Aug 19,2024, $4000, the as is was so small and on the back of a sheet we did not see it,we are senior,”
Engine · filed Jan 6, 2025
“The airbags in our 2005 Audi A4 were recalled. We had the airbag replaced due to the recall in Audi of Stratham, 58 Portsmouth Ave, Stratham, NH 03885 in February 2023. On 12/8/23, my daughter was involved in a serious front-end collation with another vehicle. The airbags in the Audi did not deploy. The other vehicle…”
Air Bags · filed Dec 9, 2023
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
334 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2005 Audi A4. The 10 most recent:
This bulletin provides information on the additional reporting requirements for safety related inquiries.
A0023742052680_4 · Service Bulletin/Repair Instructions · issued Oct 4, 2023
Inside the Rings | Volume 12, Spring 2023
DC_AudiRingsV12 · Service Bulletin/Repair Instructions · issued Apr 28, 2023
In conjunction with the Massachusetts DMV, Audi will be sending Takata airbag recall reminder notices to approximately 2,907 Audi owners in the State of Massachusetts on March 13, 2023.
TRMDMV_MA_Audi · Service Bulletin/Repair Instructions · issued Mar 13, 2023
In conjunction with the New Mexico DMV, Audi will be sending Takata airbag recall reminder notices to approximately 389 Audi owners in the State of New Mexico on March 13, 2023.
TRMDMV_NM_Audi · Service Bulletin/Repair Instructions · issued Mar 13, 2023
In conjunction with the Colorado DMV, Audi will be sending Takata airbag recall reminder notices to approximately 2,174 Audi owners in the State of Colorado on February 13, 2023.
TRMDMV_CO_Audi · Service Bulletin/Repair Instructions · issued Feb 13, 2023
Takata recall and 3G turndown
DC_Rings_VOL10 · Service Bulletin/Repair Instructions · issued Feb 10, 2023
In conjunction with the New York DMV, Audi will be sending Takata airbag recall reminder notices to approximately 5,165 Audi owners in the State of New York on October 17, 2022.
TRMDMV_NY_Audi · Service Bulletin/Repair Instructions · issued Oct 17, 2022
In conjunction with the South Carolina Department of Public Safety, Audi is sending Takata airbag recall reminder notices to approximately 1,121 Audi owners in the state of South Carolina on September 19, 2022.
TRMDPS_SC_Audi · Service Bulletin/Repair Instructions · issued Sep 19, 2022
In conjunction with the Georgia Department of Revenue - Motor Vehicle Division and Department of Driver Services, Audi sent Takata airbag recall reminder notices to approximately 565 Audi owners in the State of Puerto…
TRMDMV_PR_Audi · Service Bulletin/Repair Instructions · issued Jul 25, 2022
In conjunction with the Georgia Department of Revenue - Motor Vehicle Division and Department of Driver Services, Audi sent Takata airbag recall reminder notices to approximately 2,616 Audi owners in the State of…
TRMDMV_GA_Audi · Service Bulletin/Repair Instructions · issued Jun 23, 2022
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2005 Audi A4 has 3 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2005 Audi A4?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 59,000 miles — budget accordingly if the car is approaching that mileage.