2017 Mazda Cx-3 MOT pass rate: 88.3% (14,373 tests)

2017-registered Mazda Cx-3s passed 88.3% of 14,373 MOT tests in 2023–2025 — 4.3 points better than all UK cars registered in 2017 (84.0%). This is one of the strongest Cx-3 years in the age-adjusted MOT ranking, although the individual car still matters more.

88.3%Pass rate, 2017 cars

104.3Age-adjusted index (100 = average)

14,373Tests analysed

44,168 miMedian mileage at test

88.8% / 85.3%Petrol vs diesel pass rate

Is the 2017 Cx-3 getting worse?

Pass rate of 2017-registered cars across recent test years:

Test year	Pass rate
2023	89.7% +3.9 vs same-age
2024	88.5% +4.7 vs same-age
2025	86.8% +4.4 vs same-age

The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.

What fails on a 2017 Cx-3

#	System	Defects recorded	Share
1	Tyres	808	29.4%
2	Brakes	756	27.5%
3	Suspension	391	14.2%
4	Visibility	308	11.2%
5	Lamps, reflectors and electrical equipment	179	6.5%
6	Seat belts and supplementary restraint systems	148	5.4%

All Cx-3 years compared

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2015	6,996	80.9%	+2.2 pts	58,382
2016	14,521	82.1%	+0.8 pts	52,608
2017 (this page)	14,373	88.3%	+4.3 pts	44,168
2018	16,668	91.1%	+4.8 pts	36,824
2019	20,957	92.6%	+4.2 pts	28,844

Weighing up which year to buy? See the full ranking: Mazda Cx-3 years to avoid.

Buying a 2017 Cx-3? Two checks first

Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

FAQs

Is a 2017 Mazda Cx-3 reliable?

2017-registered examples passed 88.3% of their MOT tests (14,373 tests, 2023–2025), +4.3 points versus all UK cars registered in the same year. At roughly 9 years old with a median 44,168 miles, condition now varies car by car — always check the individual MOT history.

What mileage is too high for a 2017 Cx-3?

The median tested example shows 44,168 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.

Should I buy the petrol or diesel 2017 Cx-3?

In this cohort petrols pass 88.8% of tests against 85.3% for diesels. Mileage and use can explain part of that gap, so treat it as a reason to inspect DPF and emissions history, not a fuel-type verdict.

Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.