2021 Audi Q4 E-tron S Line 40 MOT Pass Rate
Pass rate for Q4 E-tron S Line 40 models manufactured in 2021, based on 2,429 real MOT test results.
Data from official DVSA MOT testing records
This page shows all Q4 E-tron S Line 40 cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 Audi Q4 E-tron S Line 40 vintage page → (89.0% current pass rate)2021 Audi Q4 E-tron S Line 40 MOT Analysis
The 2021 Audi Q4 E-tron S Line 40 has an MOT pass rate of 89.0% based on 2,429 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 30,356 miles on the odometer. With a 11.0% failure rate, the 2021 Q4 E-tron S Line 40 is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 Audi Q4 E-tron S Line 40 is Tyres, responsible for 17.8% 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. Lamps, reflectors and electrical equipment is the second most common issue at 1.7%. Non-component advisories follows at 1.5%.
Top failures specific to 2021 models only. The overall Q4 E-tron S Line 40 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 | 17.8% | 432 |
| 2 | Lamps, Reflectors And Electrical Equipment | 1.7% | 41 |
| 3 | Non-component Advisories | 1.5% | 36 |
| 4 | Visibility | 1.3% | 32 |
| 5 | Suspension | 0.9% | 23 |
| 6 | Seat Belts And Supplementary Restraint Systems | 0.5% | 13 |
| 7 | Identification Of The Vehicle | 0.5% | 12 |
| 8 | Brakes | 0.4% | 9 |
| 9 | Body, Chassis, Structure | 0.1% | 3 |
Failures per 10,000 Miles
avg. 30,356 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 |
|---|---|---|---|
| Tyres | 5.86 | 17.8% | 432 |
| Lamps & Electrical | 0.56 | 1.7% | 41 |
| Non-component advisories | 0.49 | 1.5% | 36 |
| Visibility | 0.43 | 1.3% | 32 |
| Suspension | 0.31 | 0.9% | 23 |
| Seat Belts | 0.18 | 0.5% | 13 |
| Identification of the vehicle | 0.16 | 0.5% | 12 |
| Brakes | 0.12 | 0.4% | 9 |
| Body & Structure | 0.04 | 0.1% | 3 |
| Wheels | 0.01 | 0.0% | 1 |
| Noise, emissions and leaks | 0.01 | 0.0% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 Audi Q4 E-tron S Line 40 has an MOT pass rate of 89.0% based on 2,429 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 30,356 miles on the odometer. With a 11.0% failure rate, the 2021 Q4 E-tron S Line 40 is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 Audi Q4 E-tron S Line 40, 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 30,356 miles, many of these vehicles are still in good mechanical condition.
Tyres — 17.8% of failures
Tyres issues account for 17.8% of MOT failures on 2021 Audi Q4 E-tron S Line 40 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.
Lamps, reflectors and electrical equipment — 1.7% of failures
Lamps, reflectors and electrical equipment issues account for 1.7% of MOT failures on 2021 Audi Q4 E-tron S Line 40 models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Non-component advisories — 1.5% of failures
Non-component advisories issues account for 1.5% of MOT failures on 2021 Audi Q4 E-tron S Line 40 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.