4th generation (B8, Typ 8K) · B8 / Typ 8K (MLB); B8.5 facelift from MY2013 · 375 complaints, 217 with mileage
Owners filed 375 complaints with NHTSA about the 2009–2016 Audi A4, and 217 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
Failures are spread across the mileage range, with the middle half between 40,000 and 100,000 miles. The median is 77,800 miles.
The most-reported areas are the engine (36.3% of complaints, typically around 93,710 miles), the steering (10.9% of complaints, typically around 61,415 miles), the transmission and driveline (6.4% of complaints, typically around 56,500 miles).
2 recall campaigns cover this generation.
| System | Complaints | Share | Typical mileage | Middle half |
|---|---|---|---|---|
| Engine | 136 | 36.3% | 93,710 | 68,000–112,000 |
| Steering | 41 | 10.9% | 61,415 | 28,000–88,540 |
| Air Bags | 36 | 9.6% | — | — |
| Power Train | 24 | 6.4% | 56,500 | 3,413–80,000 |
| Fuel/Propulsion System | 23 | 6.1% | 86,000 | 45,607–103,700 |
| Electrical System | 19 | 5.1% | — | — |
| Engine And Engine Cooling | 17 | 4.5% | 23,500 | 4,800–72,000 |
| Unknown Or Other | 16 | 4.3% | — | — |
| Suspension | 9 | 2.4% | — | — |
| Exterior Lighting | 9 | 2.4% | — | — |
| Year | Complaints | With mileage |
|---|---|---|
| 2009 | 150 | 90 |
| 2010 | 77 | 61 |
| 2011 | 17 | 10 |
| 2012 | 23 | 13 |
| 2013 | 28 | 17 |
| 2014 | 38 | 15 |
| 2015 | 24 | 7 |
| 2016 | 18 | 4 |
Complaints about this generation are not spread evenly across the vehicle, and the systems that generate the most of them do not all fail at the same point in a car's life. The median failure across all systems here is 77,800 miles; the figures below show which parts of the car run ahead of that and which run behind.
The engine accounts for 36.3% of complaints (136 reports, 82 of them with a mileage figure), with a median of 93,710 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 68,000 and 112,000 miles.
A single system taking 36.3% of all complaints is a concentration worth noting. It means that for this generation, most of what owners reported came back to one area of the car rather than being distributed across many small faults.
The steering accounts for 10.9% of complaints (41 reports, 29 of them with a mileage figure), with a median of 61,415 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 28,000 and 88,540 miles.
The transmission and driveline accounts for 6.4% of complaints (24 reports, 15 of them with a mileage figure), with a median of 56,500 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 3,413 and 80,000 miles.
The fuel and propulsion system accounts for 6.1% of complaints (23 reports, 17 of them with a mileage figure), with a median of 86,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 45,607 and 103,700 miles.
The engine and its cooling system accounts for 4.5% of complaints (17 reports, 15 of them with a mileage figure), and it fails early — a median of 23,500 miles, well before the vehicle's overall median. Failures clustered this far below the rest of the car usually point to a design or manufacturing problem rather than wear, because wear does not selectively target one system on low-mileage examples. The middle half of these reports falls between 4,800 and 72,000 miles.
Within this generation, complaint volume is not constant across model years. The 2009 model year drew the most — 150 complaints — while 2012 drew the fewest at 23. The median year sits at 33.
That makes 2009 an outlier: roughly 4.5 times the median year of this generation. A single year standing that far apart usually reflects either a first-year issue that was later corrected, or a component change introduced for that year. Anyone shopping this generation has a straightforward reason to prefer a different year, all else being equal.
NHTSA records 2 recall campaigns covering vehicles in this generation. A recall means the manufacturer or the regulator concluded there was a safety defect or a standard was not met, and that a free remedy is owed to owners — including second and later owners.
The campaigns cluster around the airbag system (2). Repeated recalls against the same area of the car generally mean the first remedy did not fully resolve the underlying problem.
Recall status is specific to the individual vehicle, not the model. Checking a VIN against NHTSA's lookup is free and takes under a minute, and it is the only way to know whether a particular car has had the work done.
Of the 375 complaints filed against this generation, 9 reported a crash; 11 reported a fire; 6 reported an injury. Crash-involved reports represent 2.4% of the total.
These are owner-reported outcomes, not verified investigations, and they are not adjusted for how many of these vehicles are on the road. They are included because the distinction between a fault that strands a car and a fault that causes a collision is the one that matters most, and it is not visible in a complaint count alone.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 40,000 and 100,000 miles, with a median of 77,800. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the engine and the steering are where this generation's reports concentrate, so those are the areas worth a specific look. The steering in particular shows a median failure mileage of 61,415, which gives a concrete number to compare against the odometer of any car you are considering.
None of this is a substitute for a pre-purchase inspection on the individual car. Aggregate patterns describe a population; the example in front of you has its own history.
The early EA888 2.0T uses a piston design with 21 mm wrist pins and a ring pack that fails to control oil, producing consumption reported at over one quart per 1,000 miles. Audi initially replaced pistons and rings under warranty, later offering a revised crankcase breather element plus software. Subject of a class action settlement; the revised piston/ring kit is the durable fix.
The hydraulic timing chain tensioner is poorly designed and commonly fails shortly after the warranty period, allowing the chain to go slack and jump a tooth on the camshaft, causing valve-to-piston contact and engine failure. Subject of a US class action filed by plaintiffs across 17 states; Audi revised the tensioner design.
The plastic water pump and integrated thermostat housing crack and leak coolant, a routine failure on this engine family.
Carbon accumulation on the intake valves of the direct-injected 2.0T causing misfires, rough idle and lost power.
| Campaign | Date | Component |
|---|---|---|
| 17V032000 | 2018-03-30 | Air Bags:Frontal:Passenger Side:Inflator Module |
| 16V376000 | 2016-10-31 | Air Bags |