Reliability Report · Multi-Source Data

Porsche 911 (2015–2017) Reliability

The Porsche 911 (2015–2017) scores 99/100 on our composite reliability index — excellent territory — drawn from DVSA, NHTSA data. Estimated used prices span €25,700–€71,100.

Composite Score
99
/ 100
Excellent
Sources: DVSA · NHTSA · latest 2026
Market Snapshot
Listed model years2015–2017
Est. used price€25,700–€71,100
Documented issues0
Listings in catalogue50
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Reliability data covers the model. A VIN history report covers the exact Porsche 911 you're looking at — accident and write-off records, mileage rollback, outstanding finance and theft checks.

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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=16
16 complaints across 5 sampled year(s); resolved model="911 CARRERA"
View source ↗
100
/ 100
DVSA MOT (UK Inspections)
Model years 2004–2021 · 2024 report · n=76217
76,217 UK MOT tests · overall 5.9% fail rate vs UK fleet baseline
View source ↗
100
/ 100
DVSA MOT (UK Inspections)
Model years 2003–2020 · 2023 report · n=33183
33,183 UK MOT tests · overall 8.9% fail rate vs UK fleet baseline
View source ↗
97
/ 100

UK MOT Reliability Detail

Based on 76,217 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
100
2.6% fail vs 10.9% fleet
9,202 tests
Age 6–9 yrs
100
2.8% fail vs 19.2% fleet
23,044 tests
Age 10–14 yrs
100
4.7% fail vs 32.1% fleet
17,579 tests
Age 15–20 yrs
99
10.4% fail vs 38.8% fleet
26,392 tests

Most Common MOT Failure Categories

#1
Windscreen
4,219
27.5%
#2
Joints
3,693
24.0%
#3
Condition
3,042
19.8%
#4
Catalyst emissions
2,314
15.1%
#5
Headlamp aim
2,099
13.7%

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.

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