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moderate Owners of the 2015 Audi A6 have filed 6 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
| Model year | engine complaints |
|---|---|
| 2012 A6 | 10 |
| 2013 A6 | 7 |
| 2014 A6 | 5 |
| 2015 A6 (this page) | 6 |
| 2016 A6 | 11 |
| 2017 A6 | 3 |
| 2019 A6 | 6 |
Of the 6 engine complaints filed for the 2015 Audi A6, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
All 2 active engine recalls on this vehicle land at critical or severe — none classified moderate.
Engine accounts for 27% of all owner complaints filed against this vehicle, across 3 categories tracked.
A blocked pump or a short-circuited pump can increase the risk of a fire.
If the coolant pump overheats, it can increase the risk of a fire.
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
full bulletin at NHTSA ↗This bulletin provides informaiton when the engine is not running smoothly, misfiring.
full bulletin at NHTSA ↗This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
full bulletin at NHTSA ↗This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
full bulletin at NHTSA ↗This bulletin provides information regarding UV leak additive for finding oil leaks.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
Coolant sprayed on engine components due to leaking Coolant /Water pump. Coolant level is falling below minimum level - Problem confirmed by the dealer 1. Water pump 2. Coolant sprayed onto engine components - potential fire hazard 3. Confirmed by dealer 4. Unknown 5, Umknown
The contact owns a 2015 Audi A6. The contact stated that while driving on neighborhood roads at approximately 25 MPH, the coolant warning light was illuminated. The contact proceeded to park on the side of the road and walk to her residence to pick up coolant to refill the coolant tank. The vehicle was then taken to the independent mechanic where it was diagnosed that the coolant tank needed to…
The defect of water pump used by this model causes coolant leakage and a serious overheating problem that triggers the temperature warning light. It is a safety risk without repairing this.
Tl* the contact owns a 2015 Audi a6. The contact received notification of NHTSA campaign number: 18v229000 (engine and engine cooling); however, the parts to do the repair were unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The contact called a local dealer (Audi north orlando, 139 n. Oregon st., sanford, fl 32771) and was…
The contact owns a 2015 Audi A6. The contact stated while driving 65 MPH, the oil warning light illuminated. The contact veered to the side of the road and called for roadside assistance. The vehicle was towed to a local dealer to be diagnosed. The contact was informed that the oil level was extremely low due to an oil leak. The contact was informed that the timing chain kit and camshaft cover…
It's a documented issue but not catastrophic. 6 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
Based on the 6 complaints filed, engine issues most often appear around 80,667 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Yes — 2 active recall(s) cover engine issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.