Reliability Report · Multi-Source Data

Audi A6 (2015–2017) Reliability

The Audi A6 (2015–2017) scores 75/100 on our composite reliability index — good territory — drawn from ADAC, DVSA, NHTSA data. The most-flagged failure mode is mmi infotainment freeze / boot failure, typically surfacing between 80,000 and 180,000 km. Workshop repair runs €400–€1,200. In total we track 2 documented issues for this model — ranked by severity below. Estimated used prices span €13,700–€24,000.

Composite Score
75
/ 100
Good
Sources: ADAC · DVSA · NHTSA · latest 2026
Market Snapshot
Listed model years2015–2017
Est. used price€13,700–€24,000
Documented issues2
Listings in catalogue23
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Reliability by Source

Each independent organization measures reliability differently. TÜV reports inspection defect rates by age band. ADAC reports pan-European breakdowns per 1,000 vehicles. NHTSA aggregates US consumer complaints. DVSA MOT data is the UK fleet's annual safety inspection — every car 3+ years old. Lower variance across sources = higher confidence in the composite.

NHTSA (US Complaints)
Model years 2013–2019 · 2026 report · n=237
237 complaints across 5 sampled year(s); resolved model="A6"
View source ↗
64
/ 100
ADAC (European Auto Club)
All model years · 2025 report
6.9/1000 breakdowns
View source ↗
69
/ 100
DVSA MOT (UK Inspections)
Model years 2004–2021 · 2024 report · n=194838
194,838 UK MOT tests · overall 15.4% fail rate vs UK fleet baseline
View source ↗
86
/ 100
DVSA MOT (UK Inspections)
Model years 2003–2020 · 2023 report · n=119624
119,624 UK MOT tests · overall 17.7% fail rate vs UK fleet baseline
View source ↗
81
/ 100

UK MOT Reliability Detail

Based on 194,838 MOT tests in the UK during the 2024 reporting period. Score for each age band reflects this model's fail rate vs the UK-fleet baseline fail rate at the same age — a generation-aware metric.

Age 3–5 yrs
82
7.6% fail vs 10.9% fleet
20,127 tests
Age 6–9 yrs
87
11.0% fail vs 19.2% fleet
74,329 tests
Age 10–14 yrs
88
17.4% fail vs 32.1% fleet
68,536 tests
Age 15–20 yrs
83
26.5% fail vs 38.8% fleet
31,846 tests

Most Common MOT Failure Categories

#1
Windscreen
15,596
26.1%
#2
Condition
15,261
25.5%
#3
Joints
10,799
18.1%
#4
Tread depth
9,918
16.6%
#5
Registration plate lamp(s)
8,234
13.8%

Categories ranked across all MOT tests of this model in the UK during the 2024 period. "Condition" covers cosmetic / wear issues; suspension and braking dominate the rest.

Known Issues

Specific failure modes documented across European workshops, owner forums, and TSBs. Costs in EUR (and USD reference) reflect typical retail European labor + parts ranges — specialist shops at the low end, dealer pricing at the high end.

MMI infotainment freeze / boot failure
Typical at 80,000–180,000 km
C7 A6 MMI / RMC head unit freezes on cold start or fails to boot; software flash often clears, hardware replacement on persistent cases.
€400–€1,200medium
Air suspension compressor failure (Allroad / Avant adaptive air)
Typical at 90,000–180,000 km
C6/C7 Allroad and air-suspended A6 compressor fails; car sags overnight, leak detection often finds air-strut perish too.
€800–€2,500high

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