⚠️ Audi manufacturer position
Audi erWin/ELSA prescribes fuel cart draining and module service; warranty excludes misfuel.
Vehicle information
| Make | Audi |
|---|---|
| Model | A3 |
| Market status | Sold new in the US 2006–present (TDI through ~2015) |
| Body styles | Sedan, Cabriolet (legacy) |
| Generations | 8P, 8V (2015–2020), 8Y (2021–present) |
| Engine options | Gasoline: 2.0L TFSI and 1.8L/2.0L turbo gasoline Diesel: 2.0L TDI (US 2010–2015 passenger cars) |
| Fuel tank capacity | 13.2–14.5 gal |
| Fuel system | Gasoline FSI/direct injection; TDI common-rail with HP pump |
| Access method | Fuel pump module under rear seat on many A3 — erWin |
| Anti-siphon | Yes — sophisticated anti-siphon |
| Service portal | Audi erWin / ELSA (erwin.audi.com) |
Misfuel risk High
US A3 TDI is highly sensitive to gasoline contamination—do not start.
If the engine was not started
Ignition OFF; tow for complete drain on TDI if gasoline added.
If the engine was started
TDI: assume HP pump and injectors; gasoline: inspect HPFP if diesel run.
Access procedure
- Disconnect battery ground strap; ignition OFF.
- Briefly open and close fuel door to relieve capless system pressure if equipped.
- Release fuel pressure per erWin/ELSA (relay or scan tool—avoid cranking with wrong fuel).
- Access fuel pump module (often under rear seat or cargo floor) per model erWin group.
- Drain tank using VW-approved fuel cart connected at module service ports.
- Replace fuel filter; inspect low-pressure and high-pressure components per contamination severity.
- Reinstall, reconnect battery, prime system, leak-check, and clear adaptations if required.
Related models
- S3
- Golf
- A4
Frequently asked questions
What should I do if I put the wrong fuel in my Audi A3?
Do not start the engine or cycle the ignition to RUN if the fuel pump may prime. Have the vehicle recovered to a USIFDA Certified Repair Facility and follow Audi service information for tank draining and fuel system inspection.
Does Audi warranty cover misfuel damage on an A3?
No. Audi warranties exclude damage from improper or contaminated fuel. Repairs are typically customer-pay; document the OEM-prescribed remediation procedure.
Can fuel be removed from an A3 through the filler neck?
Audi documents fuel recovery via the fuel pump module access and/or tank removal using approved equipment—not filler-neck siphoning. Follow ISTA/TIS or erWin procedures for your model year.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
Find an operator Consumer guidance