Audi S4 2011–2012 3.0 TFSI: fuel smell near the rail and injectors

Why smell alone cannot select a replacement

Proper fuel-system diagnosis must locate the leak: rail/injector connection, other accessible joints, or impact-damaged wiring and neighbouring parts. A general petrol smell entry does not identify a defective component.

Editorial inspection order.

What repair branch 24AP includes

The remedy replaces fuel rails and corresponding seals. The repair document separately notes concurrent thermostat or crankcase-ventilation valve updates are not repairs of this safety recall’s cause.

Volkswagen Group of America / NHTSA repository: Part573 Safety Recall Report15V-019 / Audi24APAudi / NHTSA repository: Audi24AP/H6 fuel injection campaign repair instructions

Full material about the model

The documented leak, 24AP replacement scope and why concurrent thermostat work does not prove leak causation.