MOT fail rates

Toyota IQ MOT fail rate by age

How often the Toyota IQ fails its MOT at each age, compared with all cars of the same age, and what it fails on. From 67,409 DVSA MOT tests taken 2022 to 2025.

MOT data updated 22 September 2026

At 13 years, the most tested age

MOT fail rate at age 13 (n=15,128)24.3%

All cars at 13 years (n=6,612,160)38.3%

Median mileage at test65,337

All cars, median mileage92,305

37 of 293 model groups with enough tests fail less often at 13 years.

What stands out

At 9 years the Toyota IQ fails 17.1% of MOTs (2,162 tests), 10.0 points below the 27.1% for all cars that age. At 16 years it fails 28.8% (6,064 tests), 13.8 points below the 42.6% average.
The gap is widest at 15 years: 14.7 points below all cars.
Its most common structural or mechanical fail item at 13 years: Rigid brake pipes: excessively corroded, at 2.9 per 100 MOTs.

MOT fail rate by age

Solid line: this model. Dashed line: all cars at the same age.

Toyota IQ: share of MOT tests that failed, by age, against all cars. Ages with fewer than 1,000 tests are not shown.
Age	MOT fail rate	Tests (n)	All cars	Difference	Median mileage
9 years	17.1%	2,162	27.1%	−10.0 pts	40,281 miles
10 years	18.1%	4,483	30.3%	−12.2 pts	46,612 miles
11 years	20.5%	7,051	33.3%	−12.7 pts	52,685 miles
12 years	23.0%	9,967	36.0%	−13.0 pts	59,421 miles
13 years	24.3%	15,128	38.3%	−13.9 pts	65,337 miles
14 years	25.9%	12,611	40.3%	−14.4 pts	69,823 miles
15 years	26.9%	9,943	41.6%	−14.7 pts	73,582 miles
16 years	28.8%	6,064	42.6%	−13.8 pts	77,220 miles

Most common fail items at 13 years

Split into structural or mechanical items and wear items. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.

Structural and mechanical

Fail item	Per 100 MOTs
Rigid brake pipes: excessively corroded Major	2.9
Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt Major	2.4

Out of 15,128 MOTs. A test with two faults counts twice.

Wear and upkeep

Fail item	Per 100 MOTs
Wipers not clearing screen Major	4.8
Side/position light not working Major	3.5
Tyre tread below 1.6 mm Dangerous	2.3
Washers: provides insufficient washer liquid Major	2.1
Brake pads under 1.5 mm Dangerous	1.9
Brake light not working Major	1.7
Headlamp aim: projected beam image is obviously incorrect Major	1.5
Dipped headlight not working Major	1.3

Out of 15,128 MOTs. A test with two faults counts twice.

Other models at 13 years

Model	MOT fail rate	Tests (n)	All cars
Toyota Yaris	32.8%	88,790	38.3%
Toyota Aygo	36.3%	53,131	38.3%
Toyota Auris	34.4%	39,506	38.3%

MOT fail rate by first-use year

Each year has its own page: the fail rate for cars first used that year at each MOT from 2022 to 2025 with at least 1,000 tests, the most common faults at that age, and the car tax and ULEZ rules for that year.

First-use year data updated 28 September 2026.

Latest MOT age with at least 1,000 tests for each first-use year.
First used	Age at test	MOT fail rate	Tests (n)	All cars
2009	16 years in 2025	28.8%	6,049	42.6%
2010	15 years in 2025	27.0%	3,683	41.6%
2011	14 years in 2025	25.5%	2,482	40.3%
2012	13 years in 2025	23.5%	2,328	38.3%
2013	12 years in 2025	22.6%	1,283	36.0%

More on the Toyota IQ

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

Looking at one Toyota IQ?

These are figures for the model, not for one car. The VetTheCar Buying Report looks at a single car: its MOT tests, defects, advisories and mileage readings.

See an example report Browse the car tools

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 22 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources