Problems · NHTSA complaints

2015 Audi A4 problems

Owners filed 44 complaints about the 2015 Audi A4 with NHTSA between Dec 2014 and Jul 2026. The most-cited component is engine (16).

Complaints
44
Filed with NHTSA
Crashes
4
Reported by owners
Fires
0
Reported by owners
Injuries
6
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine16
  2. Electrical system7
  3. Power train6
  4. Engine and engine cooling4
  5. Air bags4
  6. Fuel/propulsion system3
  7. Steering3
  8. Exterior lighting2
  9. Structure2
  10. Forward collision avoidance1
  11. Visibility/wiper1
  12. Seat belts1
  13. Wheels1
  14. Back over prevention1

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 27, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20141
20151
20161
20172
201813
20198
20202
20214
20224
20232
20242
20253
20261

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Engine

16 reports
“Oil consumption is extremely high this vehicle burns way to much oil in short amount of time. Oil has to be added every 300 to 400 miles and there are no leaks present”
Owner complaint to NHTSAFiled Jul 15, 2026EngineODI 11750557

Electrical system

7 reports
“MMI system worked during test drive and then NOT worked after final sale: Safety systems included: The Multi Media Interface (MMI) system is an in-car user interface media system developed by Audi, and was launched at the 2001 Frankfurt Motor Show. MMI operates a large number of in car entertainment components, car electronics, and other functions. The list below indicates systems controllable by MMI. However, depending on the car model, along with version specified, only some functions will be available. Satellite navigation Radio tuner Media sources Telephone HVAC, climate control Car setup (e.g. central locking), global audio settings, suspension settings Rear view camera and parking sensors Driver information (e.g. fuel economy…) User manual Apple CarPlay 2014 and later model.”
Owner complaint to NHTSAFiled Mar 12, 2023Electrical system, Unknown or other, Forward collision avoidanceODI 11511420

Power train

6 reports
“The engine failed while I was driving. The car did not show any warning lamps, messages or other symptoms, it just jumped and died. I had the car towed to my mechanic. The mechanic thought it was the starter, but then realized the chain had broken and it hit other parts of the engine, including the pistons catastrophically. The engine is not reparable. My safety was a risk as the car died on a busy road. Audi has asked that I bring the car, at my expense for them to inspect, without offering anything. I have a letter from them indicating that they will not help. ABS SYSTEM and Brake Actuator that is failing or defective. Vehicle was taken to the dealer but was not repaired.”
Owner complaint to NHTSAFiled Jan 12, 2022Power train, EngineODI 11447143

Engine and engine cooling

4 reports
“The contact owns a 2015 Audi A4. The contact stated that when the vehicle was started, the coolant warning light illuminated. The vehicle was turned off and restarted after 20 minutes, and the coolant warning light was no longer illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 141,177.”
Owner complaint to NHTSAFiled Dec 4, 2025Engine and engine coolingODI 11703017

Air bags

4 reports4 crashes
“TL* THE CONTACT OWNS A 2015 AUDI A4. THE CONTACT STATED THAT WHILE DRIVING AT 30 MPH, SHE ATTEMPTED TO AVOID HITTING ANOTHER VEHICLE THAT HAD DARTED IN FRONT OF HER VEHICLE. DESPITE HER BEST EFFORTS, THE CONTACT CLIPPED THE RIGHT PASSENGER SIDE OF THE OTHER VEHICLE WHICH CAUSED SEVERE DAMAGE TO THE FRONT END OF HER VEHICLE. THE AIR BAGS DID NOT DEPLOY UPON IMPACT. THE CONTACT'S DAUGHTER HIT HEAD ON THE BACK OF THE DRIVER SEAT AND JAMMED HER THUMB; NO OTHER INJURIES WERE REPORTED AND NO MEDICAL ATTENTION WAS NEEDED. A POLICE REPORT WAS FILED AT THE SCENE. THE VEHICLE WAS TOWED TO AN INDEPENDENT TOW YARD AND HAD YET TO BE INSPECTED BY INSURANCE. THE MANUFACTURER NOR THE DEALER HAD YET TO BE NOTIFIED OF THE FAILURE. THE VEHICLE HAD YET TO BE REPAIRED.THE FAILURE MILEAGE WAS APPROXIMATELY 46,000.”
Owner complaint to NHTSAFiled Nov 16, 2020Air bagsCrash reportedODI 11374934

Fuel/propulsion system

3 reports
“Spark plug for damaged due to oil seeping into it. This could lead to overheating of engine or cylinders getting damaged potentially leading to vehicle malfunction when I drive. Audi inspected the part and recommended to reseal the top of the engine. There was a warning for check engine which led to identifying the problem”
Owner complaint to NHTSAFiled Feb 18, 2025Engine, Fuel/propulsion systemODI 11643290
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 27, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.