2003 Audi A4 problems & reliability
210 owner complaints filed with NHTSA for the 2003 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.
8 complaints report injuries (12 injured).
Federal crash records (FARS 2020–2023): 2003 Audi A4 vehicles were involved in 10 fatal crashes with 8 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 |
|---|---|---|
| Power Train | 43 | 20% |
| Fuel System, Gasoline | 41 | 20% |
| Electrical System | 32 | 15% |
| Exterior Lighting | 23 | 11% |
| Vehicle Speed Control | 22 | 10% |
| Visibility | 19 | 9% |
| Engine and Engine Cooling | 17 | 8% |
| Structure | 14 | 7% |
| Air Bags | 12 | 6% |
| Engine | 7 | 3% |
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 60,000 miles (middle 50% between 40,000 and 86,500 miles), based on 173 complaints that included mileage.
Complaints by incident year
What owners report
“Radio intermediate goes out hitting bumps speedometer stopped working the number ninth digit is not pulling up when I search vehicle information Replaced engine vehicle only had 20,000 miles”
Electrical System · filed Nov 26, 2022
“The contact owns a 2003 Audi A4. The contact stated while driving 65 MPH, the vehicle decelerated, lost motive power and stalled without warning. The contact stated that the vehicle failed to restart and there was steam coming from the vehicle. The vehicle was towed to the residence where an independent mechanic…”
Engine and Engine Cooling · filed Oct 6, 2022
“The contact owns a 2003 Audi A4. The contact stated that while driving at an undisclosed speed, a fuel odor was detected. The contact parked the vehicle and noticed there was fuel leaking on the rear driver's side. The vehicle was taken to the dealer and diagnosed that the fuel pump flange and hoses needed to be…”
Fuel System, Gasoline · filed Jan 6, 2022
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
163 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2003 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
This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
SM 48-2022 · Service Bulletin/Repair Instructions · issued Jun 15, 2022
This informational bulletin explains how to order replacement VIN plates, Safety Certification Labels, etc.
A0021482021205_6 · Service Bulletin/Repair Instructions · issued Jun 25, 2021
This information bulletin contains instructions for technicans on how to ensure their TAC call goes smoothly.
A0020362002047_1 · Service Bulletin/Repair Instructions · issued Apr 16, 2020
00 Software Version Management (SVM), operating instructions
A0019252011732_1 · Service Bulletin/Repair Instructions · issued Sep 17, 2019
This communication is issued to inform dealers of updated shipping regulations related to lithium ion batteries.
AWC 19-05 · Service Bulletin/Repair Instructions · issued Aug 28, 2019
This communication is issued to remind dealers of the repair validation process for repair group 19. 2005-2019 A3, 1996-2019 A4, 2008-2019 A5, 1992-2019 A6, 2012-2019 A7, 1997-2019 A8, 2019 E-Tron, 2015-2019 Q3…
AWC 19-04 · Service Bulletin/Repair Instructions · issued Jul 22, 2019
This bulletin contains instructions for additional reporting requirements for safety related inquiries (airbag/seatbelts, accidents, fire and overheat damage). 2008-2021A3, 2015-2021A3 Cabrio, 2005-2016 A3 Sportback…
A0019212052680_1 · Service Bulletin/Repair Instructions · issued Jun 7, 2019
This informational bulletin contains technical information for when there is condensation visible on the inside of the headlight, taillight, fog light, side marker light, front turn signal, daytime running lights…
A941791 2012749- · Service Bulletin/Repair Instructions · issued Jul 31, 2017
This special notice is to inform dealers to return all part numbers listed in the document and order the superseded part numbers going forward.
SM 44-2017 EN · Service Bulletin/Repair Instructions · issued Jun 28, 2017
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 2003 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 2003 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 60,000 miles — budget accordingly if the car is approaching that mileage.