What can leak fuel
Certain S4 3.0 TFSI have a reported leak at the fuel-rail/injector connection. Production tolerances combined with driving vibration could allow leakage. The documented sign is fuel smell from the engine bay. An ignition source could turn the leak into a fire.
Volkswagen Group of America / NHTSA repository: Part573 Safety Recall Report15V-019 / Audi24AP
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.
15V-019 chronology says initial checks and bench analysis found no deviations; later work investigated component positions within tolerances and driving effects. One inspection without visible leakage therefore does not reproduce all conditions of the reported scenario.
Volkswagen Group of America / NHTSA repository: Part573 Safety Recall Report15V-019 / Audi24AP
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
Distinguish the established fuel-connection defect from associated work in the estimate. A replacement list does not prove every part defective or one common cause. Request each operation’s basis and leak-check results.
If there are front-impact traces
Record accessible damage and fluid location before cleaning/dismantling. Impact contact, production tolerance and previous repair are different hypotheses, not one conclusion from smell or 24AP. If removed rails were not examined, their original condition may remain unknown.
Which S4 vehicles are covered
The S4 row in 15V-019 specifies MY2011–2012, 3.0 TFSI, April 20, 2011–March 3, 2012. The instruction’s broad 2011–2013 heading covers multiple models; it does not add S4 MY2013. Check the actual vehicle and repair criterion.
Volkswagen Group of America / NHTSA repository: Part573 Safety Recall Report15V-019 / Audi24APAudi / NHTSA repository: Audi24AP/H6 fuel injection campaign repair instructions
Applicability to the individual vehicle
- Historical S4 MY2011–2012 3.0 TFSI; MY2013 from other models not transferred.
- Smell does not locate the leak; concurrent replacements do not prove every part failed.
Primary sources
Sources checked on . Model or recall information does not establish the condition of an individual VIN.
Volkswagen Group of America / NHTSA repository: Part573 Safety Recall Report15V-019 / Audi24AP
Applicability and source location
Certain US S4 MY2011–2012 3.0 L TFSI, April 20, 2011–March 3, 2012. Other models/MY2013 A7 are not S4 fitment.
Page 1: S4; pages 2–3: rail/injector tolerance/vibration, investigation and rail/seal remedy.
Document date: 2015-01-16. Checked: .
Audi / NHTSA repository: Audi24AP/H6 fuel injection campaign repair instructions
Applicability and source location
Specified S4 MY2011–2012 3.0 TFSI with VIN/criterion verification. Broad 2011–2013 multi-model heading is not S4 year scope.
Pages 1–5: rails/injector seals; thermostat/crankcase-valve updates expressly unrelated to safety recall. Header date unqualified.
Document date: not specified in the source. Checked: .