⚠️ Audi overview
Audi is the premium brand of Volkswagen Group with a large UK diesel parc (TDI) plus widespread TFSI petrol. Petrol-in-diesel remains the dominant UK misfuel on A3, A4, and Q SUVs. Workshop procedures are published in ELSA/erWin.
Service portal
VW Group erWin / ELSApro (authorised workshop subscription)
Fuel system notes
- Common-rail TDI with high-pressure pump — petrol contamination is critical if the engine runs.
- AdBlue filler is separate on SCR diesels — never add fuel to the AdBlue tank.
- Capless and anti-siphon fuel fillers are common; use pump-module drainage per ELSA.
Model index
Select a model for misfuel and fuel contamination procedures:
Frequently asked questions
Does Audi cover misfuel under warranty in the UK?
No — fuel contamination is excluded as customer misuse. Use a GBIFDA-certified fuel extraction and retain invoices for insurance or Motor Ombudsman cases.
Which Audi models are highest risk for petrol-in-diesel?
High-mileage TDI saloons and SUVs (A4, A6, Q5, Q7) where drivers habitually use diesel nozzles — one petrol fill is enough if the engine starts.
Need professional misfuel recovery?
Find a certified operator or read consumer guidance for your next steps.
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