Toyota iQ 2010: MOT failure rate for its age

22.9% of 22,823 MOT tests of the Toyota iQ first registered in 2010 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 101.2 (95% CI 98.4–103.9; 100 = normal for this model at that age): the 2010 build year is no different from other years of the same model at the same age.

Toyota iQ built in 2010 at a glance
Measure	Value	Unit	Compared with	Years	Tests
Failed first time	22.9	%	all ages tested	2019–2024	22823
Index against this model at the same age (95% CI 98.4–103.9)	101.2	index	100 = normal for this model at that age	2019–2024	22823
Rank among this model's 6 build years	4	of 6	1 = fails least for its age	2019–2024	22823
Tested in 2024	3711	tests	median 70,245 miles	2024	3711

Built 2010 against Toyota iQ normal for the age: first-time MOT failure share at each age, age 9: 20% vs 20.8%; age 10: 21.7% vs 21.1%; age 11: 21.9% vs 22.2%; age 12: 22.8% vs 23%; age 13: 25.2% vs 23.9%; age 14: 26.2% vs 25.2%. Axis from 0% to 30%. DVSA MOT bulk data, 2019–2024.

Check a 2010 Toyota iQ by registration · All Toyota iQ 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 2010 Toyota iQ fail at each age?

Cars built in 2010 were tested at ages 9 to 14 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.

Toyota iQ built 2010: 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)
9	3,972	20	18.8–21.3	20.8	96.2
10	3,732	21.7	20.4–23.1	21.1	102.8
11	3,788	21.9	20.6–23.3	22.2	98.7
12	3,790	22.8	21.5–24.2	23	98.9
13	3,830	25.2	23.9–26.6	23.9	105.7
14	3,711	26.2	24.8–27.7	25.2	104.1

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 22,823 (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 2010 Toyota iQ?

The most common failure group on cars built in 2010 is lamps, reflectors and electrical equipment: 12.9 items per 100 first tests, against 11.9 across all build years of the Toyota iQ. These counts are not age-adjusted: cars built in 2010 were tested at ages 9 to 14.

Failure items per 100 first tests, Toyota iQ built 2010 against the Toyota iQ in all build years (2019–2024, not age-adjusted)
Failure group	Built 2010, per 100	All build years, per 100	Items
Lamps, reflectors and electrical equipment	12.9	11.9	2,945
Visibility	9.5	9.1	2,160
Brakes	9.1	8.8	2,085
Suspension	7.5	7.3	1,709
Tyres	5.7	5.1	1,312

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 22,823 (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 2010 compare with the years around it?

Among the 6 published build years of the Toyota iQ, 2010 ranks 4 (1 = fails least for its age). 2009: index 102.7. 2011: index 101.4.

Toyota iQ build years: index against the model at the same age (2019–2024)
Build year	Index (100 = normal)	95% interval	Verdict	Tests
2009	102.7	100.6–104.8	worse	38,393
2010	101.2	98.4–103.9	no different	22,823
2011	101.4	97.9–104.9	no different	15,181
2012	97.8	94.1–101.5	no different	14,059
2013	94.3	89.3–99.4	better	7,887
2014	83.5	77.2–89.7	better	5,041

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 103,384 (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). Toyota iQ 2010 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/toyota-iq/2010/

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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