2020 Audi A4 S Ln Blk Ed 40 Mhev Sa — MOT failures & pass rate

Across 333 MOT tests analysed for the 2020 Audi A4 S Ln Blk Ed 40 Mhev Sa, the most common recorded failure areas were tyres, visibility and lighting & signalling. Its pass rate of 92.5% was above the average for cars of a similar age (90.5%).

Pass rate

333

MOT tests analysed

7.5%

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 A4 S Ln Blk Ed 40 Mhev Sa
#	Category	% of tests affected	Tests
1	Tyres	6.3%	21
2	Visibility	0.9%	3
3	Lighting & signalling	0.9%	3
4	Suspension	0.6%	2
5	Body, structure & corrosion	0.3%	1

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 A4 S Ln Blk Ed 40 Mhev Sa
#	Failure item	Times recorded
1	Tread depth	12
2	Headlamp aim	5
3	Wipers	2
4	Coil spring	1
5	Passenger's seat	1
6	Mounting	1

Top advisory categories

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

Most common MOT advisories — 2020 Audi A4 S Ln Blk Ed 40 Mhev Sa
#	Category	% of tests with advisory	Tests
1	Tyres	23.7%	79
2	Brakes	6.9%	23
3	Other defects	5.7%	19
4	Suspension	3.6%	12
5	Visibility	0.9%	3
6	Lighting & signalling	0.6%	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 — 2020 A4 S Ln Blk Ed 40 Mhev Sa
Mileage band	Tests	Fail rate
0-30k	162	6.2%
30-60k	146	8.9%

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 — 2020 A4 S Ln Blk Ed 40 Mhev Sa
Dataset year	Tests	Fail rate
2023	103	6.8%
2024	119	8.4%
2025	111	7.2%

What to check before buying a 2020 A4 S Ln Blk Ed 40 Mhev Sa

Before buying a 2020 Audi A4 S Ln Blk Ed 40 Mhev Sa, focus on the areas it most often fails on. Tyres accounted for 6.3% of tests for this year.

Tyres (6.3% 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 (0.9% 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 (0.9% 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 2020 Audi A4 S Ln Blk Ed 40 Mhev Sas pass their MOT?

92.5% of the 333 2020 Audi A4 S Ln Blk Ed 40 Mhev Sa MOT tests in this dataset passed — a 7.5% fail rate.

What is the most common MOT failure on a 2020 Audi A4 S Ln Blk Ed 40 Mhev Sa?

Tyres, recorded in 6.3% of tests, followed by visibility (0.9%).

Does the 2020 A4 S Ln Blk Ed 40 Mhev Sa get worse with mileage?

Its MOT fail rate rises from 6.2% in the 0-30k band to 8.9% in the 30-60k band.

Methodology & source. Based on 333 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.