2021 Audi A4 S Line 40 Tdi Mhev Quat Sa MOT Pass Rate
Pass rate for A4 S Line 40 Tdi Mhev Quat Sa models manufactured in 2021, based on 58 real MOT test results.
Data from official DVSA MOT testing records
This page shows all A4 S Line 40 Tdi Mhev Quat Sa cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa vintage page → (90.9% current pass rate)2021 Audi A4 S Line 40 Tdi Mhev Quat Sa MOT Analysis
The 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa has an MOT pass rate of 91.4% based on 58 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,000 miles on the odometer. With a 8.6% failure rate, the 2021 A4 S Line 40 Tdi Mhev Quat Sa is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa is Tyres, responsible for 27.6% of failures. 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 range from £50–200 per tyre. Suspension is the second most common issue at 3.4%. Non-component advisories follows at 1.7%.
Top failures specific to 2021 models only. The overall A4 S Line 40 Tdi Mhev Quat Sa page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Tyres | 27.6% | 16 |
| 2 | Suspension | 3.4% | 2 |
| 3 | Non-component Advisories | 1.7% | 1 |
Failures per 10,000 Miles
avg. 31,000 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Tyres | 8.90 | 27.6% | 16 |
| Suspension | 1.11 | 3.4% | 2 |
| Non-component advisories | 0.56 | 1.7% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa has an MOT pass rate of 91.4% based on 58 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 31,000 miles on the odometer. With a 8.6% failure rate, the 2021 A4 S Line 40 Tdi Mhev Quat Sa is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to tyres: 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. With relatively low average mileage of 31,000 miles, many of these vehicles are still in good mechanical condition.
Tyres — 27.6% of failures
Tyres issues account for 27.6% of MOT failures on 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa models. 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.
Suspension — 3.4% of failures
Suspension issues account for 3.4% of MOT failures on 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa models. 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.
Non-component advisories — 1.7% of failures
Non-component advisories issues account for 1.7% of MOT failures on 2021 Audi A4 S Line 40 Tdi Mhev Quat Sa models. Non-component advisories issues are a common cause of MOT failure. Regular inspection and maintenance of these components helps ensure your vehicle passes its MOT. Typical repair costs: £100–400. Pre-MOT check: Have this system checked during regular servicing. Look for warning signs like unusual noises, vibrations, or dashboard warning lights.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.