Audi S4 reliability, MPG and running costs
Figures updated
The Audi S4 is a car. In 2024 MOT tests it scored 193 for reliability (100 is average), ranking 26 of 442, and 15.2% failed first time against a UK average of 28.5%. Its most common MOT failure is condition (1.5% of tests).
Ranked 26 of 442 cars in the 2024 MOT Reliability League
In 2024, 2,274 Audi S4s aged 3 to 20 had an MOT and 15.2% failed first time (UK average 28.5%). Taking age and mileage into account, the Audi S4 is 48% less likely to fail than the average car of the same age and mileage. At the first MOT, at three years old, 6.2% failed (UK 12.7%).
First-time fail rate
15.2%
UK 28.5%
Fail rate at 3 years
6.2%
UK 12.7%
Average miles a year
8,700
Typical age at test: 10 years
Audi S4 MOT failure rate by age
Most common Audi S4 MOT faults
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.5% of tests
- Pins and bushes: pin or bush excessively worn1.5% of tests
- Condition: has ply or cords exposed1.4% of tests
- Coil spring: fractured or broken1.0% of tests
- Malfunction indicator lamp: inoperative or indicates a malfunction0.9% of tests
- Tread depth: tread depth below requirements of 1.6mm0.9% of tests
What the Audi S4 fails on
| Area | Tests failing | vs similar cars |
|---|---|---|
| Tyres | 4.9% | ▼ 26% less often |
| Suspension | 4.3% | ▼ 53% less often |
| Lights and electrics | 4.1% | ▼ 66% less often |
| Exhaust and emissions | 2.1% | ▼ 39% less often |
| Brakes | 1.6% | ▼ 78% less often |
| Body and structure | 1.5% | ▼ 62% less often |
| Visibility | 1.1% | ▼ 78% less often |
| Seat belts and airbags | 0.6% | ▼ 51% less often |
| Steering | 0.3% | ▼ 87% less often |
| Wheels | 0.2% | ▼ 43% less often |
How much is road tax on a Audi S4?
Any Audi S4 first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates).
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Frequently asked questions
›Is the Audi S4 reliable?
Its MOT record is better than average: the Audi S4 is 48% less likely to fail than the average car of the same age and mileage, with a reliability score of 193 in our 2024 league (100 is average).
›What are common problems with the Audi S4?
The most common MOT fault is “Condition: has a cut in excess of the requirements deep enough to reach the ply or cords”, found in 1.5% of tests.
›How much is road tax on a Audi S4?
Any Audi S4 first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates).
›How many Audi S4s fail their MOT?
15.2% of Audi S4s aged 3 to 20 failed their MOT first time in 2024, and 6.2% failed at their first MOT.
Sources: DVSA anonymised MOT tests 2024, all versions of the Audi S4 combined (Open Government Licence v3.0). How we calculate the league.