Audi S4 Avant MOT Pass Rate
Overall pass rate across all manufacture years, based on 5,474 real MOT test results. Failure rate: 22.2%.
Data from official DVSA MOT testing records
Audi S4 Avant MOT Reliability Overview
The Audi S4 Avant is a less common vehicle in the UK, with 5,474 MOT test results recorded in our database spanning 12 manufacture years. It has an overall MOT pass rate of 77.8% and a failure rate of 22.2%, which is well above the UK average of approximately 37%.
Based on this data, the Audi S4 Avant earns a "Excellent" reliability rating. The average Audi S4 Avant presents for MOT with approximately 84,751 miles on the clock. Manufacture year matters: 2011 models achieve the highest pass rate at 88.2%, while 1999 models have the lowest at 54.1%. This 34.1 percentage point difference suggests notable variation in build quality or component durability across production years.
The most common MOT failure for the Audi S4 Avant is Suspension, affecting 19.7% of all tests. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. The second most common issue is Tyres at 16.4%. Brakes rounds out the top three at 11.4%. Together, these top 3 failure categories account for a significant portion of all MOT failures for this model.
Top failures across all manufacture years combined. Individual year pages may show different top failures.
What Fails Most
Best Year to Buy
📈 How Each Vintage Ages
📉 How Age Affects Reliability
MOT failure rate by vehicle age for the Audi S4 Avant. The dashed red line marks when the manufacturer warranty typically expires (3 years).
Line chart showing MOT failure rate by vehicle age from 3 to 16 years, with warranty expiry marked at 3 years.
💡 What does the warranty cliff mean?
The Audi S4 Avant ages relatively gracefully. The failure rate increase of 7% after warranty is below average, suggesting good long-term reliability. Peak failure occurs at age 16 (34.9% fail rate).
Note: pass rates may improve for very old vehicles due to survivorship bias — only well-maintained cars remain on the road.
Pass Rate by Manufacture Year
* High Fail Rate badge indicates an MOT pass rate below 65% (failure rate above 35%).
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Suspension | 20.9% | 1,146 |
| 2 | Tyres | 18.1% | 989 |
| 3 | Lamps, Reflectors And Electrical Equipment | 15.0% | 818 |
| 4 | Brakes | 12.2% | 670 |
| 5 | Driver's View Of The Road | 3.0% | 166 |
| 6 | Noise, Emissions And Leaks | 3.0% | 162 |
| 7 | Body, Chassis, Structure | 2.3% | 124 |
| 8 | Exhaust, Fuel And Emissions | 1.8% | 98 |
| 9 | Non-component Advisories | 1.2% | 66 |
| 10 | Registration Plates And Vin | 1.2% | 65 |
| 11 | Steering | 1.1% | 62 |
| 12 | Visibility | 1.1% | 58 |
| 13 | Identification Of The Vehicle | 0.9% | 50 |
| 14 | Seat Belts And Supplementary Restraint Systems | 0.5% | 29 |
Failures per 10,000 Miles
avg. 84,751 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Suspension | 2.47 | 20.9% | 1,146 |
| Tyres | 2.13 | 18.1% | 989 |
| Lamps & Electrical | 1.76 | 15.0% | 818 |
| Brakes | 1.44 | 12.2% | 670 |
| Visibility | 0.49 | 4.1% | 224 |
| Noise, emissions and leaks | 0.35 | 3.0% | 162 |
| Body & Structure | 0.27 | 2.3% | 124 |
| Emissions & Exhaust | 0.21 | 1.8% | 98 |
| Non-component advisories | 0.14 | 1.2% | 66 |
| Registration Plates and VIN | 0.14 | 1.2% | 65 |
| Steering | 0.13 | 1.1% | 62 |
| Identification of the vehicle | 0.11 | 0.9% | 50 |
| Seat Belts | 0.06 | 0.5% | 29 |
🚗 Similar Cars to Consider
Mileage at MOT
The average Audi S4 Avant has 84,751 miles when tested for MOT.
📊 Mileage-Adjusted Failure Rate
How often this car fails MOT relative to how much it's driven — a fairer comparison than raw pass rate.
The Audi S4 Avant has a mileage-adjusted failure rate of 2.62% per 10,000 miles driven. The average across all makes is 5.38%, so this model is better than average.
About Audi S4 Avant MOT Data
The Audi S4 Avant is a less common vehicle in the UK, with 5,474 MOT test results recorded in our database spanning 12 manufacture years. It has an overall MOT pass rate of 77.8% and a failure rate of 22.2%, which is well above the UK average of approximately 37%.
For Audi S4 Avant owners, these results suggest a reliable vehicle that generally passes its MOT without major issues. Focus your pre-MOT checks on suspension and tyres for the best chance of a first-time pass. Use our detailed year-by-year breakdown and failure analysis below to understand how your specific S4 Avant is likely to perform.
Suspension — 19.7% of failures
Suspension issues account for 19.7% of MOT failures on the Audi S4 Avant. Suspension failures typically involve worn bushes, leaking shock absorbers, broken coil springs, and damaged suspension arms. These affect ride quality, tyre wear, and road holding. Typical repair costs: £200–500. Pre-MOT check: Look for uneven tyre wear, listen for clunking over bumps, and check if the car pulls to one side. A bouncy ride suggests worn shock absorbers. Visually inspect coil springs for cracks.
Tyres — 16.4% of failures
Tyres issues account for 16.4% of MOT failures on the Audi S4 Avant. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Brakes — 11.4% of failures
Brakes issues account for 11.4% of MOT failures on the Audi S4 Avant. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Frequently Asked Questions
What is the MOT pass rate for the Audi S4 Avant?
Based on 5,474 MOT tests in our database, the Audi S4 Avant has an overall pass rate of 77.8% (22.2% fail rate).
What are the most common MOT failures on a Audi S4 Avant?
The top 3 reasons a Audi S4 Avant fails its MOT are: 1. Suspension (19.7%), 2. Tyres (16.4%), 3. Brakes (11.4%). Check these areas before booking your MOT.
Is the Audi S4 Avant reliable?
With a 22.2% MOT failure rate, the S4 Avant is more reliable than average compared to the UK average of ~40%.
What should I check before an MOT on my Audi S4 Avant?
Based on failure data, focus on: Suspension (19.7%); Tyres (16.4%); Brakes (11.4%). These are the areas most likely to cause a fail. Also check all lights, tyres (minimum 1.6mm tread), and windscreen condition — these are quick wins that apply to all cars.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.