2021 Audi E-Tron S Line 50 — MOT failures & pass rate

Across 1,080 MOT tests analysed for the 2021 Audi E-Tron S Line 50, the most common recorded failure areas were tyres, visibility and lighting & signalling. Its pass rate of 90.4% was in line with the average for cars of a similar age (91.2%).

Pass rate

1,080

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 E-Tron S Line 50
#	Category	% of tests affected	Tests
1	Tyres	7.7%	83
2	Visibility	2.0%	22
3	Lighting & signalling	1.3%	14
4	Other defects	0.6%	6
5	Seat belts & restraints	0.3%	3
6	Body, structure & corrosion	0.3%	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 E-Tron S Line 50
#	Failure item	Times recorded
1	Tread depth	40
2	Washers	15
3	Headlamp aim	14
4	Wipers	12
5	Registration plates	10
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 E-Tron S Line 50
#	Category	% of tests with advisory	Tests
1	Tyres	25.5%	275
2	Other defects	9.4%	102
3	Visibility	3.5%	38
4	Brakes	1.5%	16
5	Suspension	0.6%	6
6	Body, structure & corrosion	0.2%	2

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 S Line 50
Mileage band	Tests	Fail rate
0-30k	493	9.7%
30-60k	524	9.3%
60-90k	60	11.7%

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 S Line 50
Dataset year	Tests	Fail rate
2024	537	9.3%
2025	529	9.8%

What to check before buying a 2021 E-Tron S Line 50

Before buying a 2021 Audi E-Tron S Line 50, focus on the areas it most often fails on. Tyres accounted for 7.7% of tests for this year.

Tyres (7.7% 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.
Visibility (2.0% 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.
Lighting & signalling (1.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£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 S Line 50s pass their MOT?

90.4% of the 1,080 2021 Audi E-Tron S Line 50 MOT tests in this dataset passed — a 9.6% fail rate.

What is the most common MOT failure on a 2021 Audi E-Tron S Line 50?

Tyres, recorded in 7.7% of tests, followed by visibility (2.0%).

Does the 2021 E-Tron S Line 50 get worse with mileage?

Its MOT fail rate rises from 9.7% in the 0-30k band to 11.7% in the 60-90k band.

Methodology & source. Based on 1,080 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.