2015 Audi S4 problems, complaints & recalls
Most-reported problem areas: Engine (1)
🧭 Reliability snapshot
Compared against other Audi S4 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (1)
Air Bags 2014-10-24 · campaign 14V667000 · 101,938 vehicles
Defect: Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2013-2015 Audi A4 and S4 vehicles manufactured February 16, 2012, to October 21, 2014, and 2013-2015 Audi Allroad vehicles manufactured March 12, 2012, to October 21, 2014. Due to an improper algorithm in the air bag control module, if a crash necessitates deployment of the side air bags, a second impact to the front of the vehicle may not command the front air bags to also deploy.
Risk: If the front air bags do not deploy in the event of a secondary impact to the front of the vehicle, there is an increased risk of occupant injury.
Fix: Volkswagen will notify owners, and Audi dealers will update the air bag control unit software, free of charge. The recall began on November 14, 2014. Owners may contact Audi customer service at 1-800-822-2834. Volkswagen's number for this recall is 69K5.
Service bulletins (690)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-25 · TSB_2083409_1 · Service Bulletin/Repair Instructions
this bulletin states that technicians are required to report to the manufacturer when a vehicle has flooded, and specify the height to which the vehicle has been flooded.
Unknown Or Other 2026-09-25 · TSB_2052680_2 · Service Bulletin/Repair Instructions
this bulletin provides information for reporting safety related information to the manufacturer.
Steering 2026-09-22 · TSB_2074846_5 · Service Bulletin/Repair Instructions
this bulletin provides information about vibrations and rotational steering vibrations.
Visibility/Wiper 2026-09-22 · TSB_2020552_15 · Service Bulletin/Repair Instructions
this bulletin provides service information regarding exterior glass cleaning.
Unknown Or Other 2026-09-15 · TSB_2030471_9 · Service Bulletin/Repair Instructions
this bulletin provides information when the license plate mounting bracket threded inserts are stripped.
Structure:body 2026-09-08 · TSB_2068999_5 · Service Bulletin/Repair Instructions
this tsb describes a corrosion issue due to outside influence and the prohibition of warranty in these cases.
Showing the 6 most recent of 690 bulletins. Search all of them free at nhtsa.gov.
What owners report
2023-01-13 · Engine“the r&r valve/oil separator unit failed on my 2015 audi s4 at approximately 71,000 miles. this unit, when fails, can mix the oil and anti-freeze which can seize the engine. i was able to catch the problem before engine failure. minneapolis audi repaired the vehicle this week, 1/10/23. there were no warning indicators except noise. various medi…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.