2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A — MOT failures & pass rate

Across 429 MOT tests analysed for the 2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A, the most common recorded failure areas were tyres, brakes and emissions & environmental. Its pass rate of 90.4% was in line with the average for cars of a similar age (91.2%).

Pass rate

429

MOT tests analysed

9.6%

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 Q7 Sln Blk Ed 45Tdi Mhev Qto A
#	Category	% of tests affected	Tests
1	Tyres	6.1%	26
2	Brakes	2.6%	11
3	Emissions & environmental	1.4%	6
4	Lighting & signalling	0.7%	3
5	Visibility	0.7%	3
6	Seat belts & restraints	0.5%	2

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 Q7 Sln Blk Ed 45Tdi Mhev Qto A
#	Failure item	Times recorded
1	Tread depth	15
2	Brake pads	6
3	Service brake performance	6
4	Malfunction indicator lamp	5
5	SRS malfunction indicator lamp	2
6	Brake discs	2

Top advisory categories

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

Most common MOT advisories — 2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A
#	Category	% of tests with advisory	Tests
1	Tyres	17.3%	74
2	Brakes	16.6%	71
3	Other defects	13.8%	59
4	Visibility	5.4%	23
5	Seat belts & restraints	0.9%	4
6	Lighting & signalling	0.9%	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 Q7 Sln Blk Ed 45Tdi Mhev Qto A
Mileage band	Tests	Fail rate
0-30k	147	9.5%
30-60k	240	10.4%
60-90k	41	4.9%

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 Q7 Sln Blk Ed 45Tdi Mhev Qto A
Dataset year	Tests	Fail rate
2024	211	10.0%
2025	206	9.2%

What to check before buying a 2021 Q7 Sln Blk Ed 45Tdi Mhev Qto A

Before buying a 2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A, focus on the areas it most often fails on. Tyres accounted for 6.1% of tests for this year.

Tyres (6.1% 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 (2.6% 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.
Emissions & environmental (1.4% of tests): More common on older diesels (DPF/EGR) — can be expensive; check for warning lights and smoke. Typical repair: £100–£600.

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 Q7 Sln Blk Ed 45Tdi Mhev Qto As pass their MOT?

90.4% of the 429 2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A MOT tests in this dataset passed — a 9.6% fail rate.

What is the most common MOT failure on a 2021 Audi Q7 Sln Blk Ed 45Tdi Mhev Qto A?

Tyres, recorded in 6.1% of tests, followed by brakes (2.6%).

Does the 2021 Q7 Sln Blk Ed 45Tdi Mhev Qto A get worse with mileage?

Its MOT fail rate rises from 9.5% in the 0-30k band to 4.9% in the 60-90k band.

Methodology & source. Based on 429 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.