Problem Lookup › Audi › S4 › 2015
Car problem report
2015 Audi S4 problems, recalls and owner complaints
What the 2015 Audi S4 has been recalled for and what owners report, from official government data. Updated October 25, 2026.
- 1safety recall
- 1owner complaint
- 0crash reports
- 0fire reports
- 0injuries reported
The least complained-about Audi S4 year on file: 1 complaints, against an average of 14 for the other model years.
Every Audi S4 model year with its number of owner complaints. Pick a year to compare.
What goes wrong with the 2015 Audi S4?
The components named most often in the 1 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
Has the 2015 Audi S4 been recalled?
1 U.S. safety recall. Repairs are free at a franchised dealer; some are done over the air.
Air Bags 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.
Is the 2015 Audi S4 recalled in the UK or Europe?
Recalls issued by the UK's DVSA and through the EU's Safety Gate system that cover this model and build period. European models can differ from U.S. ones, and "years estimated" means the recall gave no build dates, so confirm your own car with your registration or VIN.
EU Safety GateIn certain vehicles, fuel can leak onto the engine fuel rail.Fuel leakage close to a source of ignition may increase the risk of the vehicle catching fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
What do 2015 Audi S4 owners report?
1 of the 1 complaints, the most recent for the most-reported components, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
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 media sources have stated that this is a known engine failure concern between 60-90K miles for this engine. Audi does not recognize this as a safety or warranty concern.
2015 Audi S4: questions owners ask
Is the 2015 Audi S4 reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 1 complaint with NHTSA about the 2015 Audi S4; the most common categories were engine (1, 100%). There is 1 safety recall.
What are the most common problems with the 2015 Audi S4?
Across 1 owner complaint filed with NHTSA, the categories mentioned most often are engine (100% of complaints). One complaint can name several components.
Does the 2015 Audi S4 have any recalls?
Yes. NHTSA lists 1 recall for the 2015 Audi S4; the most recent (campaign 14V667000, 2014-10-24) concerns Air Bags. Recall repairs are free at a franchised dealer; check your VIN at nhtsa.gov/recalls.
Check your own S4
Counts are a starting point, not a verdict: popular models collect more complaints because more of them are on the road, and NHTSA does not verify individual reports. To see whether a recall is still open on your car, enter your VIN at nhtsa.gov/recalls (U.S.) or your registration at check-vehicle-recalls.service.gov.uk (UK). Had a safety problem? Report it to NHTSA; complaints are what trigger investigations and recalls.
Data: NHTSA Office of Defects Investigation recall and complaint databases (public domain), EU Safety Gate alerts (© European Union), retrieved October 25, 2026. Model year 2015 only.