2021 Audi Q3 S Line Black Ed 35 — MOT failures & pass rate

Across 1,375 MOT tests analysed for the 2021 Audi Q3 S Line Black Ed 35, the most common recorded failure areas were tyres, brakes and visibility. Its pass rate of 91.0% was in line with the average for cars of a similar age (91.2%).

Pass rate

1,375

MOT tests analysed

8.9%

Fail rate

in line with

vs cars of similar age

3.5

Avg age at test (yrs)

How it compares

Fail rate for this model-year against the segment and national averages for cars of a similar age.

Top failure categories

Most common MOT failure areas — 2021 Audi Q3 S Line Black Ed 35
#	Category	% of tests affected	Tests
1	Tyres	5.5%	75
2	Brakes	2.8%	38
3	Visibility	1.4%	19
4	Lighting & signalling	0.5%	7
5	Seat belts & restraints	0.3%	4
6	Suspension	0.2%	3

Percentage of tests with at least one failure recorded in each category.

Most common specific failures

The exact components most often recorded as failures — more specific than the categories above.

Most frequently recorded failure items — 2021 Audi Q3 S Line Black Ed 35
#	Failure item	Times recorded
1	Brake pads	40
2	Tread depth	38
3	Washers	18
4	Headlamp aim	10
5	Attachment	6
6	Tyre pressure monitoring system	5

Top advisory categories

Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.

Most common MOT advisories — 2021 Audi Q3 S Line Black Ed 35
#	Category	% of tests with advisory	Tests
1	Tyres	21.8%	300
2	Brakes	12.7%	174
3	Other defects	9.8%	134
4	Suspension	3.3%	45
5	Visibility	2.0%	28
6	Lighting & signalling	0.3%	4

Failure rate by mileage

Higher-mileage cars tend to fail more — often the most useful guide to real condition.

MOT fail rate by recorded mileage band.

Fail rate by recorded mileage — 2021 Q3 S Line Black Ed 35
Mileage band	Tests	Fail rate
0-30k	786	7.8%
30-60k	544	10.7%
60-90k	41	9.8%

Failure rate by age

How this model-year's MOT fail rate climbs as the cars get older.

Trend over time

Fail rate by dataset year — 2021 Q3 S Line Black Ed 35
Dataset year	Tests	Fail rate
2024	697	9.8%
2025	655	7.9%

What to check before buying a 2021 Q3 S Line Black Ed 35

Before buying a 2021 Audi Q3 S Line Black Ed 35, focus on the areas it most often fails on. Tyres accounted for 5.5% of tests for this year.

Tyres (5.5% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
Brakes (2.8% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Visibility (1.4% of tests): Wipers, washers, mirrors and screen damage — usually inexpensive, but check for chips in the driver's line of sight. Typical repair: £15–£150.

Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.

Frequently asked questions

How many 2021 Audi Q3 S Line Black Ed 35s pass their MOT?

91.0% of the 1,375 2021 Audi Q3 S Line Black Ed 35 MOT tests in this dataset passed — a 8.9% fail rate.

What is the most common MOT failure on a 2021 Audi Q3 S Line Black Ed 35?

Tyres, recorded in 5.5% of tests, followed by brakes (2.8%).

Does the 2021 Q3 S Line Black Ed 35 get worse with mileage?

Its MOT fail rate rises from 7.8% in the 0-30k band to 9.8% in the 60-90k band.

Methodology & source. Based on 1,375 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.