Reliability Report · Multi-Source Data

MG Zs Reliability

The MG Zs (current generation) scores 59/100 on our composite reliability index — average territory — drawn from DVSA data.

Composite Score
59
/ 100
Average
Sources: DVSA · latest 2024
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Buying a MG Zs? Check its VIN history first

Reliability data covers the model. A VIN history report covers the exact MG Zs you're looking at — accident and write-off records, mileage rollback, outstanding finance and theft checks.

carVertical is our one disclosed affiliate partner — we earn a commission if you buy a report. It doesn't affect our reliability scores, which come from TÜV, ADAC, DVSA MOT and NHTSA data.

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 2004–2021 · 2024 report · n=27222
27,222 UK MOT tests · overall 17.1% fail rate vs UK fleet baseline
View source ↗
59
/ 100
DVSA MOT (UK Inspections)
Model years 2003–2020 · 2023 report · n=18264
18,264 UK MOT tests · overall 15.7% fail rate vs UK fleet baseline
View source ↗
59
/ 100

UK MOT Reliability Detail

Based on 27,222 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 35 yrs
54
15.5% fail vs 10.9% fleet
18,573 tests
Age 69 yrs
69
19.6% fail vs 19.2% fleet
7,722 tests
Age 1520 yrs
79
30.5% fail vs 38.8% fleet
927 tests

Most Common MOT Failure Categories

#1
Headlamp
1,435
23.6%
#2
Condition
1,383
22.8%
#3
Wipers
1,194
19.6%
#4
Service brake performance
1,060
17.4%
#5
Brake pads
1,007
16.6%

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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