2021 Audi E-Tron S Line 55 — MOT failures & pass rate
Across 2,967 MOT tests analysed for the 2021 Audi E-Tron S Line 55, the most common recorded failure areas were tyres, lighting & signalling and visibility. Its pass rate of 92.0% was in line with the average for cars of a similar age (91.2%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 6.8% | 202 |
| 2 | Lighting & signalling | 1.1% | 32 |
| 3 | Visibility | 0.7% | 20 |
| 4 | Other defects | 0.4% | 11 |
| 5 | Road wheels | 0.2% | 6 |
| 6 | Suspension | 0.1% | 4 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Tread depth | 74 |
| 2 | Headlamp aim | 30 |
| 3 | Registration plates | 16 |
| 4 | Attachment | 14 |
| 5 | Wipers | 11 |
| 6 | Washers | 9 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 20.9% | 619 |
| 2 | Other defects | 9.1% | 269 |
| 3 | Visibility | 3.3% | 98 |
| 4 | Brakes | 3.0% | 89 |
| 5 | Lighting & signalling | 0.5% | 14 |
| 6 | Suspension | 0.3% | 10 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 1,138 | 8.8% |
| 30-60k | 1,637 | 7.2% |
| 60-90k | 170 | 10.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2023 | 30 | 0.0% |
| 2024 | 1,538 | 9.4% |
| 2025 | 1,399 | 6.6% |
What to check before buying a 2021 E-Tron S Line 55
Before buying a 2021 Audi E-Tron S Line 55, focus on the areas it most often fails on. Tyres accounted for 6.8% of tests for this year.
- Tyres (6.8% 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 (1.1% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Visibility (0.7% 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 S Line 55s pass their MOT?
92.0% of the 2,967 2021 Audi E-Tron S Line 55 MOT tests in this dataset passed — a 8.0% fail rate.
What is the most common MOT failure on a 2021 Audi E-Tron S Line 55?
Tyres, recorded in 6.8% of tests, followed by lighting & signalling (1.1%).
Does the 2021 E-Tron S Line 55 get worse with mileage?
Its MOT fail rate rises from 8.8% in the 0-30k band to 10.0% in the 60-90k band.
Methodology & source. Based on 2,967 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.