2021 Audi A4 · 3,449 MOT tests
2021 Audi A4 reliability
2021 Audi A4s fail 10.3% of first MOT tests, 23% fewer MOT fails than the average car its age and mileage, ranking 7 of 24 A4 years (3,449 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Audi A4s: 26.5%)
- 10.3%
- first-time fail rate (all Audi A4s: 26.5%)
- fails than cars of the same age and mileage
- 23% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 32,382
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 3,449
- MOT tests, 2022 to 2024
Year on year
2021 against the years either side
- 2020 cars: 26% fewer MOT fails than the average car its age (the 2021 car does worse)
- Weak spot: exhaust, emissions and leaks, 1.1% of tests fail here (67% above cars of the same age and mileage).
- Plates: a 2021 car carries a 70 plate (January–February 2021), or a 21 plate (March–August 2021), or a 71 plate (September–December 2021).
Common problems
What fails on a 2021 Audi A4
Fail rate by area
- Tyres7%
- Suspension1.1%
- Exhaust, emissions and leaks1.1%
- Windscreen, wipers and mirrors0.8%
- Lights and electrics0.8%
- Seat belts and airbags0.6%
- Brakes0.5%
Average for cars of the same age and mileage
Top failures
Tyre ply or cords exposed 1.36%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Tyre tread below 1.6mm 1.36%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre cut reaching ply or cords 1.22%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre tear from structural failure 0.67%
A tear in the tyre's structure means it can fail suddenly, so it must be replaced before the car is driven.
Shock absorber serious fluid leak 0.61%
A shock absorber leaking heavily has likely lost its damping, so the car will handle and brake less safely.
Engine warning light inoperative or lit 0.52%
An engine warning light that is lit or not working can hide faults, so diagnosis is needed before buying.
Common advisories
Tyre worn close to legal limit (7.86%) · Brake pads wearing thin (3.04%) · Tyre slightly damaged or cracking (2.03%) · Nail in tyre, monitor (1.68%) · Tyre has a shallow cut (1.42%) · Brake disc pitted or scored (1.28%)
Other years
Every Audi A4 year
The full picture: Audi A4 reliability. Before you pay for any Audi A4, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2021 Audi A4 reliable?
2021 Audi A4s fail 10.3% of first MOT tests, 23% fewer MOT fails than the average car its age and mileage, ranking 7 of 24 A4 years (3,449 DVSA tests, 2022 to 2024).
What fails on a 2021 Audi A4 MOT?
Most often tyre ply or cords exposed (1.36% of tests), tyre tread below 1.6mm (1.36% of tests), tyre cut reaching ply or cords (1.22% of tests).
How many miles should a 2021 Audi A4 have done?
At its MOT aged about 3, a typical 2021 Audi A4 shows 32,382 miles. Much higher or lower is worth asking about.
What plate is a 2021 car?
A car first registered in 2021 carries a 70 plate (January–February 2021), or a 21 plate (March–August 2021), or a 71 plate (September–December 2021).
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