Mazda Bongo 2015: MOT failure rate for its age

41.5% of 1,960 MOT tests of the Mazda Bongo first registered in 2015 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 99.9 (95% CI 93.1–106.8; 100 = normal for this model at that age): the 2015 build year is no different from other years of the same model at the same age. This is a rough estimate from a smaller sample.

Mazda Bongo built in 2015 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	41.5	%	all ages tested	2019–2024	1960
Index against this model at the same age (95% CI 93.1–106.8)	99.9	index	100 = normal for this model at that age	2019–2024	1960
Rank among this model's 21 build years	11	of 21	1 = fails least for its age	2019–2024	1960
Tested in 2024	450	tests	median 111,854 miles	2024	450

Built 2015 against Mazda Bongo normal for the age: first-time MOT failure share at each age, age 4: 45.5% vs n/a%; age 6: 37.2% vs 37.8%; age 7: 42.6% vs 41.1%; age 8: 42.5% vs 43%; age 9: 44% vs 44.5%. Axis from 0% to 50%. DVSA MOT bulk data, 2019–2024.

Check a 2015 Mazda Bongo by registration · All Mazda Bongo MOT statistics · Download the build-year table (CSV)

Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).

How does the 2015 Mazda Bongo fail at each age?

Cars built in 2015 were tested at ages 4 to 9 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.

Mazda Bongo built 2015: first-time MOT failure by age, against the model's normal rate at that age (2019–2024)
Age	Tests	Failed, %	95% interval	Normal for this model at that age, %	Index (100 = normal)
4	33 (rough estimate)	45.5	29.8–62	not available	not available
6	511	37.2	33.1–41.5	37.8	98.5
7	502	42.6	38.4–47	41.1	103.6
8	497 (rough estimate)	42.5	38.2–46.8	43	98.6
9	450 (rough estimate)	44	39.5–48.6	44.5	98.9

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 1,993 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

What fails most on the 2015 Mazda Bongo?

The most common failure group on cars built in 2015 is lamps, reflectors and electrical equipment: 52 items per 100 first tests, against 52.3 across all build years of the Mazda Bongo. These counts are not age-adjusted: cars built in 2015 were tested at ages 4 to 9.

Failure items per 100 first tests, Mazda Bongo built 2015 against the Mazda Bongo in all build years (2019–2024, not age-adjusted)
Failure group	Built 2015, per 100	All build years, per 100	Items
Lamps, reflectors and electrical equipment	52	52.3	1,045
Suspension	36.5	56.1	734
Brakes	12.4	16.5	250
Noise, emissions and leaks	11.8	8.9	238
Visibility	11.7	13.1	235

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,010 (initial tests of this build year) · Method: failure items grouped by DVSA's top-level defect groups, per 100 initial tests; groups with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How does 2015 compare with the years around it?

Among the 21 published build years of the Mazda Bongo, 2015 ranks 11 (1 = fails least for its age). 2014: index 103.9. 2016: index 102.1.

Mazda Bongo build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
1998	98.3	91.7–104.9	no different (rough estimate)	1,666
1999	92.6	87.3–98.0	better (rough estimate)	2,621
2000	89.5	84.0–95.0	better (rough estimate)	2,430
2001	85.6	80.5–90.7	better (rough estimate)	2,813
2002	75.3	70.8–79.9	better (rough estimate)	3,104
2003	82.8	77.2–88.3	better (rough estimate)	2,307
2004	92.4	87.4–97.4	better (rough estimate)	3,216
2005	98.7	94.1–103.3	no different (rough estimate)	4,034
2006	107.5	102.4–112.5	worse (rough estimate)	3,521
2007	109.1	104.0–114.2	worse (rough estimate)	3,411
2008	102.3	96.9–107.8	no different (rough estimate)	2,741
2009	101.7	95.3–108.1	no different (rough estimate)	1,942
2010	104.5	98.5–110.5	no different (rough estimate)	2,211
2011	102.4	95.8–109.0	no different (rough estimate)	1,837
2012	101.3	94.1–108.6	no different (rough estimate)	1,555
2013	98.4	91.4–105.4	no different (rough estimate)	1,680
2014	103.9	97.3–110.6	no different (rough estimate)	2,068
2015	99.9	93.1–106.8	no different (rough estimate)	1,960
2016	102.1	94.7–109.4	no different (rough estimate)	1,812
2017	104.1	92.9–115.2	no different (rough estimate)	831
2018	95.7	79.4–112.1	no different (rough estimate)	371

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 48,131 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV

How to cite this page

MOT Risk Index (2026). Mazda Bongo 2015 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/mazda-bongo/2015/

How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.

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