2021 Audi E-Tron Black 55 Quat — MOT failures & pass rate

Across 1,407 MOT tests analysed for the 2021 Audi E-Tron Black 55 Quat, the most common recorded failure areas were tyres, lighting & signalling and visibility. Its pass rate of 90.9% was in line with the average for cars of a similar age (91.2%).

Pass rate

1,407

MOT tests analysed

9.1%

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 E-Tron Black 55 Quat
#	Category	% of tests affected	Tests
1	Tyres	7.6%	107
2	Lighting & signalling	1.8%	25
3	Visibility	1.1%	15
4	Other defects	0.7%	10
5	Brakes	0.3%	4
6	Seat belts & restraints	0.1%	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 E-Tron Black 55 Quat
#	Failure item	Times recorded
1	Tread depth	34
2	Headlamp aim	22
3	Registration plates	16
4	Washers	9
5	Tyre pressure monitoring system	7
6	Headlamp cleaning device	4

Top advisory categories

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

Most common MOT advisories — 2021 Audi E-Tron Black 55 Quat
#	Category	% of tests with advisory	Tests
1	Tyres	22.7%	319
2	Other defects	8.3%	117
3	Visibility	4.5%	63
4	Brakes	1.8%	26
5	Suspension	0.4%	5
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 E-Tron Black 55 Quat
Mileage band	Tests	Fail rate
0-30k	579	8.8%
30-60k	701	10.3%
60-90k	114	3.5%

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 E-Tron Black 55 Quat
Dataset year	Tests	Fail rate
2024	693	10.1%
2025	695	8.3%

What to check before buying a 2021 E-Tron Black 55 Quat

Before buying a 2021 Audi E-Tron Black 55 Quat, focus on the areas it most often fails on. Tyres accounted for 7.6% of tests for this year.

Tyres (7.6% 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.
Lighting & signalling (1.8% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
Visibility (1.1% 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 E-Tron Black 55 Quats pass their MOT?

90.9% of the 1,407 2021 Audi E-Tron Black 55 Quat MOT tests in this dataset passed — a 9.1% fail rate.

What is the most common MOT failure on a 2021 Audi E-Tron Black 55 Quat?

Tyres, recorded in 7.6% of tests, followed by lighting & signalling (1.8%).

Does the 2021 E-Tron Black 55 Quat get worse with mileage?

Its MOT fail rate rises from 8.8% in the 0-30k band to 3.5% in the 60-90k band.

Methodology & source. Based on 1,407 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.