2020 Audi Q3 S Line 40 S-A — MOT failures & pass rate

Across 3,851 MOT tests analysed for the 2020 Audi Q3 S Line 40 S-A, the most common recorded failure areas were tyres, brakes and visibility. Its pass rate of 94.7% was above the average for cars of a similar age (90.6%).

Pass rate

3,851

MOT tests analysed

5.3%

Fail rate

better than

vs cars of similar age

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 — 2020 Audi Q3 S Line 40 S-A
#	Category	% of tests affected	Tests
1	Tyres	3.2%	124
2	Brakes	1.5%	59
3	Visibility	0.8%	31
4	Lighting & signalling	0.5%	20
5	Seat belts & restraints	0.2%	7
6	Emissions & environmental	0.2%	7

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 — 2020 Audi Q3 S Line 40 S-A
#	Failure item	Times recorded
1	Brake pads	52
2	Tread depth	40
3	Washers	26
4	Headlamp aim	22
5	Brake discs	15
6	Registration plates	7

Top advisory categories

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

Most common MOT advisories — 2020 Audi Q3 S Line 40 S-A
#	Category	% of tests with advisory	Tests
1	Tyres	23.4%	901
2	Brakes	17.6%	677
3	Other defects	6.8%	260
4	Suspension	4.2%	162
5	Visibility	1.9%	73
6	Seat belts & restraints	0.2%	7

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 — 2020 Q3 S Line 40 S-A
Mileage band	Tests	Fail rate
0-30k	2,265	4.1%
30-60k	1,474	7.2%
60-90k	106	6.6%

Failure rate by age

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

By fuel type

Fail rate by fuel type — 2020 Q3 S Line 40 S-A
Fuel	Tests	Fail rate
Petrol	3,067	5.1%
Diesel	784	6.1%

Trend over time

Fail rate by dataset year — 2020 Q3 S Line 40 S-A
Dataset year	Tests	Fail rate
2022	61	0.0%
2023	1,281	5.0%
2024	1,249	5.9%
2025	1,260	5.3%

What to check before buying a 2020 Q3 S Line 40 S-A

Before buying a 2020 Audi Q3 S Line 40 S-A, focus on the areas it most often fails on. Tyres accounted for 3.2% of tests for this year.

Tyres (3.2% 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 (1.5% 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 (0.8% 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 2020 Audi Q3 S Line 40 S-As pass their MOT?

94.7% of the 3,851 2020 Audi Q3 S Line 40 S-A MOT tests in this dataset passed — a 5.3% fail rate.

What is the most common MOT failure on a 2020 Audi Q3 S Line 40 S-A?

Tyres, recorded in 3.2% of tests, followed by brakes (1.5%).

Does the 2020 Q3 S Line 40 S-A get worse with mileage?

Its MOT fail rate rises from 4.1% in the 0-30k band to 6.6% in the 60-90k band.

Methodology & source. Based on 3,851 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.