Reliability Report · Multi-Source Data

Mazda B Series Reliability

The Mazda B Series (current generation) scores 71/100 on our composite reliability index — good territory — drawn from DVSA data.

Composite Score
71
/ 100
Good
Sources: DVSA · latest 2024
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Buying a Mazda B Series? Check its VIN history first

Reliability data covers the model. A VIN history report covers the exact Mazda B Series 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.

DVSA MOT (UK Inspections)
Model years 2004–2009 · 2024 report · n=842
842 UK MOT tests · overall 36.0% fail rate vs UK fleet baseline
View source ↗
73
/ 100
DVSA MOT (UK Inspections)
Model years 2003–2008 · 2023 report · n=982
982 UK MOT tests · overall 39.7% fail rate vs UK fleet baseline
View source ↗
69
/ 100

UK MOT Reliability Detail

Based on 842 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 1520 yrs
73
36.0% fail vs 38.8% fleet
842 tests

Most Common MOT Failure Categories

#1
Joints
735
31.6%
#2
Ball joint dust cover
465
20.0%
#3
Chassis condition
437
18.8%
#4
Headlamp
345
14.8%
#5
Rear fog lamp
345
14.8%

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.

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