NHTSA vehicle safety data

2015 Audi S4 Recalls, Ratings & Complaints

The 2015 Audi S4 has 1 NHTSA recall campaign and 1 owner complaint on file as of November 3, 2026. Recall repairs are usually free at an authorized Audi dealer.

NHTSA recall and complaint data for the 2015 Audi S4, plus NCAP crash-test ratings. Recall data is refreshed daily from NHTSA.

2015 Audi S4 owner complaints

Owners have filed 1 complaint with NHTSA about the 2015 Audi S4, describing incidents dated January 9, 2023.

Most-cited components

Engine 1 complaint

Newest complaints

ODI #11501592 · Filed January 13, 2023
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…

Read the full complaint

Front Air Bags may not Deploy on Secondary Impact

NHTSA #14V667000 · Air Bags · NHTSA notice

Reported October 24, 2014 · Volkswagen Group of America, Inc.

Potentially affected: 101,938 vehicles

Repair completion: 95.42% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Manufacturer campaign 69K5 · Owners notified November 11, 2014 · Vehicles built February 16, 2012 – October 21, 2014 (per NHTSA)

Defect description

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.

Safety consequence

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.

Manufacturer remedy

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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

2015 Audi S4 4 DR AWD

out of 5

Overall Safety Rating

Frontal Crash

Driver: 5, Passenger: 5

Side Crash

Driver: 4, Passenger: 5

Side Pole

Rollover

10% rollover risk

Safety Technology

Electronic Stability Control Forward Collision Warning (Optional)

1 owner complaint has been filed with NHTSA for the 2015 Audi S4.

Engine

ODI #11501592

Incident: January 9, 2023 · Filed: January 13, 2023

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.

Other Audi S4 model years

Check your 2015 Audi S4 VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Audi S4 at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

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